BEGIN:VCALENDAR VERSION:2.0 PRODID:-//the-center-of-gravity.com//Calendar//EN METHOD:PUBLISH NAME:Calendar X-WR-CALNAME:Calendar REFRESH-INTERVAL;VALUE=DURATION:PT1H X-PUBLISHED-TTL:PT1H X-WR-TIMEZONE:Europe/Copenhagen BEGIN:VTIMEZONE TZID:Europe/Copenhagen BEGIN:STANDARD DTSTART:19961027T030000 RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10 TZNAME:CET TZOFFSETFROM:+0200 TZOFFSETTO:+0100 END:STANDARD BEGIN:DAYLIGHT DTSTART:19810329T020000 RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=3 TZNAME:CEST TZOFFSETFROM:+0100 TZOFFSETTO:+0200 END:DAYLIGHT END:VTIMEZONE BEGIN:VEVENT SUMMARY:Gravitational Wave Lensing: wave optics and GW231123 — Héctor V illarrubia-Rojo DTSTART;TZID=Europe/Copenhagen:20260113T131500 DTEND;TZID=Europe/Copenhagen:20260113T141500 DTSTAMP:20260917T041158Z UID:event-6@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20251120T143957Z DESCRIPTION:Light travelling through the Universe is deflected by the inte rvening gravitational fields\, a phenomenon known as gravitational lensing . This effect was an early prediction of General Relativity (GR) and it ha s become an essential tool in astronomy.The existence of gravitational wav es was another prediction of GR\, but in this case we had to wait until 20 15 for the first detection. Since then\, hundreds of events have been dete cted in LVK\, a number that will increase significantly in the next observ ing run and with future detectors like LISA and the Einstein Telescope.\n \nThis large number of detections guarantees the eventual observation of l ensed gravitational waves. Similarly to light\, gravitational waves are af fected by intervening matter\, but with some important differences\, e.g. they can experience diffraction. In this talk I will discuss the phenomen ology of gravitational wave lensing\, highlighting some key differences wi th light and focusing in the wave-optics regime. Finally\, I will cover th e exciting implications of the recently announced event GW231123\, which c an beconsidered to be the first serious candidate for a lensed GW. LAST-MODIFIED:20260109T172222Z LOCATION:NBI Blegdamsvej 17\, Auditorium A URL:http://the-center-of-gravity.com/calendar/event/6/ END:VEVENT BEGIN:VEVENT SUMMARY:Strong Meetings — Strong Group DTSTART;TZID=Europe/Copenhagen:20260115T104500 DTEND;TZID=Europe/Copenhagen:20260115T120000 DTSTAMP:20260917T041158Z UID:event-109@the-center-of-gravity.com RRULE:FREQ=WEEKLY;UNTIL=20260620T215959Z;BYDAY=TH EXDATE;TZID=Europe/Copenhagen:20260402T104500,20260514T104500 CATEGORIES:Meeting CREATED:20260916T141203Z LAST-MODIFIED:20260916T141203Z LOCATION:Hb1 URL:http://the-center-of-gravity.com/calendar/event/109/ END:VEVENT BEGIN:VEVENT SUMMARY:Seminar — Daniele Oriti DTSTART;TZID=Europe/Copenhagen:20260121T133000 DTEND;TZID=Europe/Copenhagen:20260121T143000 DTSTAMP:20260917T041158Z UID:event-9@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20260113T134226Z DESCRIPTION:QG Seminar LAST-MODIFIED:20260113T134226Z LOCATION:Auditorium A URL:http://the-center-of-gravity.com/calendar/event/9/ END:VEVENT BEGIN:VEVENT SUMMARY:Seminar — Marina David DTSTART;TZID=Europe/Copenhagen:20260127T131500 DTEND;TZID=Europe/Copenhagen:20260127T141500 DTSTAMP:20260917T041158Z UID:event-10@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20260113T134341Z DESCRIPTION:CoG Seminar LAST-MODIFIED:20260113T134341Z LOCATION:Auditorium A URL:http://the-center-of-gravity.com/calendar/event/10/ END:VEVENT BEGIN:VEVENT SUMMARY:Seminar — Mariana Carrillo Gonzalez DTSTART;TZID=Europe/Copenhagen:20260128T133000 DTEND;TZID=Europe/Copenhagen:20260128T143000 DTSTAMP:20260917T041158Z UID:event-11@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20260113T134603Z DESCRIPTION:QG Seminar LAST-MODIFIED:20260113T134603Z LOCATION:Auditorium A URL:http://the-center-of-gravity.com/calendar/event/11/ END:VEVENT BEGIN:VEVENT SUMMARY:Seminar — Thomas Van Riet DTSTART;TZID=Europe/Copenhagen:20260204T133000 DTEND;TZID=Europe/Copenhagen:20260204T143000 DTSTAMP:20260917T041158Z UID:event-12@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20260113T134729Z DESCRIPTION:QG Seminar LAST-MODIFIED:20260113T134729Z LOCATION:Auditorium A URL:http://the-center-of-gravity.com/calendar/event/12/ END:VEVENT BEGIN:VEVENT SUMMARY:Strong Seminars — Adrien Kuntz & Bruno Bucciotti DTSTART;TZID=Europe/Copenhagen:20260209T110000 DTEND;TZID=Europe/Copenhagen:20260209T120100 DTSTAMP:20260917T041158Z UID:event-22@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20260204T154444Z DESCRIPTION:Speaker: Adrien KuntzTitle: Green function of the Poschl-Telle r potentialAbstract: Many features of the ringdown have remained obscure u ntil today: is there a well-defined and unique way to define the starting time of the ringdown? How do quasi-normal mode amplitudes grow before reac hing a constant value? What other kinds of signals are present in the wave form right after the merger? Knowing the Green function of a black hole wo uld allow us to solve all of these questions in a precise way. Since the s eminal paper of Leaver\, little work has been done to compute the full tim e-domain Green function of black holes. I will show that it is possible to exactly solve the Green function of a toy-model approximating the Regge-W heeler-Zerilli equations\, namely the Poschl-Teller potential. Several sur prises come out of the computation: the existence of exponentially growing modes right before the ringdown starting time\, and the presence of addit ional redshift modes (distinct from QNM) during the ringdown.* * *Speaker: Bruno BucciottiTitle: Black hole perturbations and spectral instabilities Abstract:I will discuss work in progress on how weak background fields mod ify black hole quasinormal mode spectra. Two examples will be presented: s lowly rotating Kerr as a perturbation of Schwarzschild\, and external fiel ds produced by distant sources. I will conclude with brief remarks on spec tral instabilities\, which may naively make the problem appear ill-defined . LAST-MODIFIED:20260208T165127Z LOCATION:Auditorium A URL:http://the-center-of-gravity.com/calendar/event/22/ END:VEVENT BEGIN:VEVENT SUMMARY:Seminar — Fay Dowker DTSTART;TZID=Europe/Copenhagen:20260211T133000 DTEND;TZID=Europe/Copenhagen:20260211T143000 DTSTAMP:20260917T041158Z UID:event-13@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20260113T134823Z DESCRIPTION:QG Seminar LAST-MODIFIED:20260113T134823Z LOCATION:Auditorium A URL:http://the-center-of-gravity.com/calendar/event/13/ END:VEVENT BEGIN:VEVENT SUMMARY:Seminar — Benjamin Knorr DTSTART;TZID=Europe/Copenhagen:20260218T133000 DTEND;TZID=Europe/Copenhagen:20260218T143000 DTSTAMP:20260917T041158Z UID:event-20@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20260127T161708Z LAST-MODIFIED:20260127T161708Z LOCATION:Auditorium A URL:http://the-center-of-gravity.com/calendar/event/20/ END:VEVENT BEGIN:VEVENT SUMMARY:Testing Modified Gravity with Gravitational Wave Lensing — Seren a Giardino DTSTART;TZID=Europe/Copenhagen:20260224T131500 DTEND;TZID=Europe/Copenhagen:20260224T141500 DTSTAMP:20260917T041158Z UID:event-25@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20260223T121835Z DESCRIPTION:Gravitational waves are inevitably lensed as they propagate th rough the universe\, leading to deflection\, magnification\, and novel int eractions between GW polarizations\, which can produce distinctive signatu res of modified gravity theories. In particular\, scalar-tensor models wit h screening mechanisms\, such as symmetron gravity\, introduce effective m ass terms for GWs and result in lens-induced dispersion\, a frequency-depe ndent phase shift of the waveform. This dispersive effect can be significa ntly enhanced in screened environments and may\, in extreme cases\, inhibi t GW propagation through certain astrophysical bodies\, effectively turnin g them into reflectors. I will present a formalism that extends beyond the geometric optics approximation\, enabling precise characterization of the se phenomena and opening up novel avenues to use gravitational wave lensin g as a testing ground for theories of dynamical dark energy. LAST-MODIFIED:20260223T121904Z LOCATION:Auditorium A URL:http://the-center-of-gravity.com/calendar/event/25/ END:VEVENT BEGIN:VEVENT SUMMARY:Seminar — Miguel Montero DTSTART;TZID=Europe/Copenhagen:20260225T133000 DTEND;TZID=Europe/Copenhagen:20260225T143000 DTSTAMP:20260917T041158Z UID:event-14@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20260113T135138Z DESCRIPTION:QG Seminar LAST-MODIFIED:20260113T135138Z LOCATION:Auditorium A URL:http://the-center-of-gravity.com/calendar/event/14/ END:VEVENT BEGIN:VEVENT SUMMARY:From Searches to Inference: Towards the Discovery of Lensed Gravi tational Waves — Juno Chan DTSTART;TZID=Europe/Copenhagen:20260227T100000 DTEND;TZID=Europe/Copenhagen:20260227T130000 DTSTAMP:20260917T041158Z UID:event-18@the-center-of-gravity.com CATEGORIES:PhD Defense CREATED:20260120T164518Z LAST-MODIFIED:20260210T074616Z LOCATION:Auitorium A URL:http://the-center-of-gravity.com/calendar/event/18/ END:VEVENT BEGIN:VEVENT SUMMARY:Nonlinear Dynamics in General Relativity — Jaime Redondo-Yuste DTSTART;TZID=Europe/Copenhagen:20260306T130000 DTEND;TZID=Europe/Copenhagen:20260306T160000 DTSTAMP:20260917T041158Z UID:event-23@the-center-of-gravity.com CATEGORIES:PhD Defense CREATED:20260210T155617Z LAST-MODIFIED:20260210T155617Z LOCATION:Auditorium A URL:http://the-center-of-gravity.com/calendar/event/23/ END:VEVENT BEGIN:VEVENT SUMMARY:Seminar — Béatrice Bonga DTSTART;TZID=Europe/Copenhagen:20260309T131500 DTEND;TZID=Europe/Copenhagen:20260309T141500 DTSTAMP:20260917T041158Z UID:event-15@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20260113T135942Z DESCRIPTION:CoG Seminar LAST-MODIFIED:20260113T135942Z LOCATION:Auditorium A URL:http://the-center-of-gravity.com/calendar/event/15/ END:VEVENT BEGIN:VEVENT SUMMARY:Spacetime in Turmoil: Insights into Merging Black Holes and Neutro n Stars from Computational Relativistic Astrophysics — Elias Most DTSTART;TZID=Europe/Copenhagen:20260310T131500 DTEND;TZID=Europe/Copenhagen:20260310T141500 DTSTAMP:20260917T041158Z UID:event-16@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20260113T140222Z DESCRIPTION:Black holes and neutron stars are at the heart of many high-en ergy astrophysical phenomena and continue to inspire several aspects of mo dern theoretical physics and astrophysics. Powering some of the most lumi nous transients in the universe across the electromagnetic band and the gr avitational wave spectrum\, merging compact binaries are prime targets for current and future multi-messenger astronomy. Leveraging advances in mode rn computational relativistic astrophysics and numerical relativity enable s us to uncover novel insights into this extreme side of the relativistic universe. In this talk\, I will show some of the most recent developments in this field\, including how merging neutron stars can power the stronges t shocks in the universe\, or how strong magnetic fields may alter the evo lution of supermassive black hole binaries\, and can enable new electromag netic transients in the upcoming age of space-based gravitational wave det ections\, and how we can leverage new scale-bridging technologies to conn ect micro and macro scales in these problems LAST-MODIFIED:20260308T032844Z LOCATION:Auditorium A URL:http://the-center-of-gravity.com/calendar/event/16/ END:VEVENT BEGIN:VEVENT SUMMARY:PhD Defense — Kai Hendriks DTSTART;TZID=Europe/Copenhagen:20260313T140000 DTEND;TZID=Europe/Copenhagen:20260313T170000 DTSTAMP:20260917T041158Z UID:event-19@the-center-of-gravity.com CATEGORIES:PhD Defense CREATED:20260127T122026Z LAST-MODIFIED:20260127T122851Z LOCATION:Auditorium A URL:http://the-center-of-gravity.com/calendar/event/19/ END:VEVENT BEGIN:VEVENT SUMMARY:WeakLeaks: EMRI into self-gravitating bosonic fields structures — Caio Filipe Bezerra Macedo DTSTART;TZID=Europe/Copenhagen:20260316T110000 DTEND;TZID=Europe/Copenhagen:20260316T120000 DTSTAMP:20260917T041158Z UID:event-26@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20260225T120900Z DESCRIPTION:EMRIs observable by LISA provide precision probes of strong gr avity and astrophysical environments. I discuss relativistic modelling of inspirals embedded in ultralight scalar fields\, showing how scalar deplet ion and dynamical friction modify gravitational-wave emission. I then conn ect these results to boson stars and exotic compact objects\, emphasizing observable signatures that may reveal dark-matter physics through gravitat ional waves. LAST-MODIFIED:20260225T120900Z LOCATION:Auditorium A URL:http://the-center-of-gravity.com/calendar/event/26/ END:VEVENT BEGIN:VEVENT SUMMARY:Exploring Quantum Features of de Sitter Space from an Observer’s Perspective — Watse Sybesma DTSTART;TZID=Europe/Copenhagen:20260324T131500 DTEND;TZID=Europe/Copenhagen:20260324T141500 DTSTAMP:20260917T041158Z UID:event-28@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20260323T163034Z DESCRIPTION:Black holes provide an abiding source for puzzles that highlig ht tensions between quantum effects and gravity. In this context the infor mation paradox is arguable the most notorious puzzle. Studying and resolvi ng tensions that arise in such puzzles teaches us about quantum gravity\, which is an outstanding problem. Meanwhile\, our expanding universe is wel l approximated by de Sitter space\, for which notions of quantum gravity r emain elusive. In this talk I will carefully review and adopt lessons from studying black holes and use those to learn about de Sitter space. I will especially explore thermodynamics and complexity in de Sitter space in th e context of recent discussions advocating an explicit inclusion of an obs erver. LAST-MODIFIED:20260323T163034Z LOCATION:Auditorium A URL:http://the-center-of-gravity.com/calendar/event/28/ END:VEVENT BEGIN:VEVENT SUMMARY:A Guided Tour Into a Black Hole — Center of Gravity DTSTART;TZID=Europe/Copenhagen:20260324T191500 DTEND;TZID=Europe/Copenhagen:20260324T212000 DTSTAMP:20260917T041158Z UID:event-21@the-center-of-gravity.com CATEGORIES:Outreach CREATED:20260128T100213Z DESCRIPTION:Join us on a journey into one of the universe’s most extreme phenomena and discover the mysteries of black holes. If you were to fall into a black hole\, would you be able to see your feet as you fall? If bla ck holes are\, as their name suggests\, black\, how do physicists manage t o observe them? And\, perhaps most importantly\, what are black holes\, an d how do we know they exist in the first place? In recent years\, these as trophysical objects have received a great deal of attention from both the research community and the general public\, especially following the first gravitational-wave detection in 2015 by the Laser Interferometer Gravitat ional-Wave Observatory (LIGO). Despite this surge of scientific progress\, these cosmic giants remain mysterious\, and their properties counterintui tive\, making black holes a perfect topic to explore\, question\, and demy stify together. In this event\, physicists at the Niels Bohr Institute\, A riadna\, Leart\, and Lucía\, will take you on a guided tour to the heart of a black hole. You will learn what black holes are\, how they form\, and how we observe them. Join us on this fascinating journey\, where there wi ll be plenty of opportunities to ask questions\, share your curiosity\, an d take part in the discussion!Please find more information at the Planetar ium website. LAST-MODIFIED:20260916T140414Z LOCATION:Planetarium\, Gl. Kongevej 10\, 1610 København V URL:http://the-center-of-gravity.com/calendar/event/21/ END:VEVENT BEGIN:VEVENT SUMMARY:Gravitational Wave Lensing of BBHs from Active Galactic Nuclei — Samson Leong DTSTART;TZID=Europe/Copenhagen:20260325T143000 DTEND;TZID=Europe/Copenhagen:20260325T153000 DTSTAMP:20260917T041158Z UID:event-27@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20260323T141049Z DESCRIPTION:Accretion disks in active galactic nuclei (AGN) have been prop osed as efficient formation channels for massive binary black holes (BBHs) . These environments are unique astrophysical laboratories in which dynami cal interactions and gas-assisted migration can efficiently gather and mer ge BBHs. In particular\, these BBHs are expected to merge in the vicinity of the central supermassive black hole (SMBH)\, which can act as a gravita tional lens for the gravitational waves (GWs) they emit. Such a lensing co nfiguration\, with the source and lens at close separation\, is unique bec ause it produces a large opening angle between the images. This leads to distinctive signatures in the observed signals that encode both lensing an d environmental information. This feature leads to unique observational si gnatures that can be exploited for detection. I will first discuss the pro spects for detecting such lensed GW signals with current and future observ atories. I will then describe the characteristic phenomenologies of these systems\, with particular emphasis on the effects of the large opening ang le. Finally\, I will conclude by highlighting the potential astrophysical insights that such observations can provide.Seminar by Samson Leong (Chine se University of Hong Kong). LAST-MODIFIED:20260323T141159Z LOCATION:Hb1 URL:http://the-center-of-gravity.com/calendar/event/27/ END:VEVENT BEGIN:VEVENT SUMMARY:The quest do detect (exceptional) gravitational-wave sources — M arek Szczepanczyk DTSTART;TZID=Europe/Copenhagen:20260407T131500 DTEND;TZID=Europe/Copenhagen:20260407T141500 DTSTAMP:20260917T041158Z UID:event-30@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20260402T133704Z DESCRIPTION:Gravitational Wave Astronomy has already demonstrated its pote ntial to explore the Universe\, but we are still at the beginning of this journey. While we regularly observe gravitational waves from compact binar ies\, we do not know what we may discover next. In the first part of my ta lk\, I will discuss the role of model-independent searches (also known as gravitational-wave burst searches) in this exploration. I will focus on th e coherent WaveBurst\, the types of searches\, the latest developments\, a nd future prospects. As it uses minimal assumptions about the signal model s\, it can detect compact binaries with special properties. It can also de tect sources where exact signal models are not available\, such as core-co llapse supernovae\, which will be the focus of the second part of my prese ntation. The next nearby event will be one of the most exciting astronomic al events of the century. I will discuss the current search status and fut ure prospects. Finally\, I will summarize the first International Gravitat ional-Wave Network SN2025gw Symposium on gravitational waves from core-col lapse supernovae (Warsaw\, 21-25 July 2025). LAST-MODIFIED:20260422T181726Z LOCATION:Auditorium A URL:http://the-center-of-gravity.com/calendar/event/30/ END:VEVENT BEGIN:VEVENT SUMMARY:Relativistic and Carroll particles in Mielke--Baekler Spacetimes: Teleparallel ideas in 2+1 dimensions at work — Joaquim Gomis DTSTART;TZID=Europe/Copenhagen:20260422T133000 DTEND;TZID=Europe/Copenhagen:20260422T143000 DTSTAMP:20260917T041158Z UID:event-29@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20260326T155644Z DESCRIPTION:Seminar by Joaquim Gomis\, University of Barcelona\, Honorary Professor of Physics.Abstract: The Mielke--Baekler spacetimes are three-di mensional reductive homogeneous spaces together with a choice of invariant connection which is compatible with a lorentzian metric. The spacetimes g eneralise Minkowski and (anti)de~Sitter spacetimes in that the invariant m etric connection can have torsion\, a peculiarity of three dimensions. Usi ng the techniques of nonlinear realisations\, we construct worldline actio ns for massive spinning particles moving in these spacetimes. We pay parti cular attention to the so-called teleparallel branch\, in which the curvat ure vanishes. We show in this case that the spinning particle trajectories are geodesic relative to a Weitzenböck connection or\, equivalently\, as a Papapetrou-type equation with a spin-curvature force in the Levi-Civita description. We also present the canonical action and discuss the resulti ng physical degrees of freedom.  We then take the carrollian limit of the se geometries and introduce the carrollian analogues of the Mielke--Baekle r spacetimes and repeat the analysis in that case. LAST-MODIFIED:20260418T125848Z LOCATION:Hb1 URL:http://the-center-of-gravity.com/calendar/event/29/ END:VEVENT BEGIN:VEVENT SUMMARY:Resurgence of high-energy string amplitudes — Xavier Kervyn DTSTART;TZID=Europe/Copenhagen:20260427T150000 DTEND;TZID=Europe/Copenhagen:20260427T160000 DTSTAMP:20260917T041158Z UID:event-81@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20260421T155509Z DESCRIPTION:Seminar by Xavier Kervyn\, Max Planck Institute\, MunichAbstra ct: In this talk\, I will discuss the asymptotic structure of the fixed-an gle high-energy limit of tree-level string amplitudes from various perspec tives. I will show that the resulting 1/α′ expansion is governed by Ber noulli-number data rather than the multiple zeta values familiar from the low-energy expansion around α′=0\, and illustrate how resurgence promot es these divergent series to transseries with nontrivial Stokes phenomena at four points. I will also comment on extensions to higher multiplicity t hrough difference equations\, evidence a framework unifying low- and high- energy features\, and discuss the connection between Stokes phenomena\, in tersection numbers and the double-copy. This is based on work in collabora tion with Stephan Stieberger. LAST-MODIFIED:20260422T131849Z LOCATION:Hb1 URL:http://the-center-of-gravity.com/calendar/event/81/ END:VEVENT BEGIN:VEVENT SUMMARY:Friday Bar DTSTART;TZID=Europe/Copenhagen:20260501T151500 DTEND;TZID=Europe/Copenhagen:20260501T170000 DTSTAMP:20260917T041158Z UID:event-85@the-center-of-gravity.com CATEGORIES:Social CREATED:20260427T090529Z LAST-MODIFIED:20260427T091140Z LOCATION:CoG Lounge URL:http://the-center-of-gravity.com/calendar/event/85/ END:VEVENT BEGIN:VEVENT SUMMARY:Rotating black hole instability in BFSS — Jun Liu DTSTART;TZID=Europe/Copenhagen:20260513T121500 DTEND;TZID=Europe/Copenhagen:20260513T131500 DTSTAMP:20260917T041158Z UID:event-86@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20260512T130128Z DESCRIPTION:Speaker: Jun Liu\, University of Cambridge\n\nAbstract: I will discuss black holes in Einstein gravity described dually by a quantum mec hanics — the BFSS matrix model — in the ’t Hooft limit. If the black hole is static\, the dual description is an ensemble of states in strongl y coupled quantum mechanics. The thermal physics of such a black hole is w ell understood on both sides of the duality. However\, much less is known if the black hole is rotating. I will show that beyond a critical rotation \, the black hole is unstable towards perturbations that break the isometr y along the rotation angle. I will argue that this is signal for a new fam ily of black holes — rotating black bars — branching off from this ins tability. This would be interpreted as a symmetry-breaking phase transitio n in a spinning ensemble of BFSS. I will also discuss related observations in the weakly coupled limit of the matrix theory. LAST-MODIFIED:20260512T130128Z LOCATION:Hb1 URL:http://the-center-of-gravity.com/calendar/event/86/ END:VEVENT BEGIN:VEVENT SUMMARY:Real-Time Path Integrals\, Caustics and Interference in Cosmology — Job Leon Feldbrugge DTSTART;TZID=Europe/Copenhagen:20260519T131500 DTEND;TZID=Europe/Copenhagen:20260519T141500 DTSTAMP:20260917T041158Z UID:event-87@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20260515T124708Z DESCRIPTION:Interference is one of the most universal phenomena in nature\ , as exemplified by the real-time Feynman path integral. Despite the ubiqu ity of interference patterns\, their evaluation has often proven challengi ng. This is especially apparent when considering lensing in astrophysics i n the wave optics regime and when studying quantum cosmology using the pat h integral for gravity. The oscillatory integrals involved are frequently conditionally convergent\, converge slowly\, and artefacts such as depende nce on unphysical cut-offs can be difficult to avoid. Traditionally\, thes e oscillatory integrals are approximated with saddle point methods. Howeve r\, determining which saddle points to include can be a tricky exercise.Us ing Picard-Lefschetz theory — a general\, exact method for handling mult idimensional oscillatory integrals — I will present an unambiguous defin ition of the real-time path integral and an efficient numerical method for its evaluation. I will show that we can unambiguously identify the releva nt instantons using resurgence theory. By going beyond the WKB approximati on\, we obtain asymptotic series whose interrelations enable us to detect which instantons contribute to the path integral. The resulting propagator consists of an interference pattern governed by the caustics of the under lying classical system. These methods pave the way to the study of real-ti me dynamical systems in our quantum Universe. LAST-MODIFIED:20260515T125955Z LOCATION:Hb1 URL:http://the-center-of-gravity.com/calendar/event/87/ END:VEVENT BEGIN:VEVENT SUMMARY:Extreme-mass-ratio inspirals in scalar cloud environments — Rich ard Brito DTSTART;TZID=Europe/Copenhagen:20260603T131500 DTEND;TZID=Europe/Copenhagen:20260603T141500 DTSTAMP:20260917T041158Z UID:event-88@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20260528T084306Z DESCRIPTION:Speaker: Richard Brito is an assistant professor at the Instit uto Superior Técnico in Lisbon. Abstract: Future space-based gravitationa l-wave observatories like LISA will open a unique avenue to study the envi ronments surrounding black holes. Intermediate and extreme mass-ratio insp irals will spend thousands to millions of cycles in the sensitivity range of \\these detectors\, allowing subtle environmental effects to accumulate in the gravitational waveform. In this seminar I will discuss the dynamic s and gravitational-wave signatures of EMRIs evolving in scalar cloud envi ronments — bosonic condensates that can grow around spinning black holes through superradiance\, and which also serve as a useful proxy for modell ing more complex environments. I will give an overview of recent efforts t o model these systems through fully relativistic perturbative calculations \, including ongoing work to incorporate eccentric and inclined orbits. I will then highlight some of the interesting phenomena that have emerged fr om these studies\, such as delayed inspirals\, resonant excitations of the cloud's modes in the strong-field regime\, and evidence for non-integrabl e geodesic motion once the cloud's self-gravity is taken into account. LAST-MODIFIED:20260528T084540Z LOCATION:Auditorium A URL:http://the-center-of-gravity.com/calendar/event/88/ END:VEVENT BEGIN:VEVENT SUMMARY:Karl 'n Karl: A Double-Act of Gravity and Analytic Magic — Kevin Grosvenor DTSTART;TZID=Europe/Copenhagen:20260716T131500 DTEND;TZID=Europe/Copenhagen:20260716T141500 DTSTAMP:20260917T041158Z UID:event-90@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20260708T074340Z DESCRIPTION:Speaker: Kevin Grosvenor\, National Institute of Physics\, Uni versity of the Philippines Diliman\, Associate Professor\n \nAbstract: The history of gravitational physics contains many remarkable characters\, but few pairings are as unexpectedly fruitful as Karl Schwarzschild and K arl Heun. Schwarzschild's exact solutions of Einstein's equations describe some of the most important compact objects in general relativity\, while Heun's equations appear throughout mathematical physics as one of the most general classes of exactly solvable differential equations. In recent wor k\, these two Karls have repeatedly found themselves sharing the same stag e.\n \nIn this talk\, I will present two examples in which scalar-field dynamics in strong gravitational fields reveal hidden analytic structure. The first concerns the massive\, non-minimally coupled Klein–Gordon equ ation in the interior Schwarzschild solution describing a constant-density relativistic star. By uncovering an underlying Fuchsian structure\, the r adial equation can be solved exactly in terms of Heun functions\, leading to analytic solutions throughout the stellar interior and novel behavior n ear the Buchdahl compactness limit.\n \nThe second example involves mas sive charged scalar fields around Kerr–Newman black holes. Here\, exact analytic methods can be used to characterize quasibound states and superra diant instabilities\, yielding closed-form instability regions and scalar- mass thresholds without relying on traditional approximations. LAST-MODIFIED:20260715T115620Z LOCATION:Hb1 URL:http://the-center-of-gravity.com/calendar/event/90/ END:VEVENT BEGIN:VEVENT SUMMARY:Strong Seminar — Diogo Ribeiro DTSTART;TZID=Europe/Copenhagen:20260727T131500 DTEND;TZID=Europe/Copenhagen:20260727T141500 DTSTAMP:20260917T041158Z UID:event-98@the-center-of-gravity.com CREATED:20260731T091836Z DESCRIPTION:Title: The Hitchhiker's guide to the Galactic CenterAbstract: The Galactic Center (GC) is the closest laboratory for studying the enviro nment around a supermassive black hole (SMBH). Besides giving us valuable insight into what such environments may look like in other galaxies\, it i s the cleanest laboratory for testing our understanding of gravity near su permassive compact objects.In this talk I will take you on a journey to th e GC\, give an overview of the GC science case\, and highlight how current observations with the GRAVITY instrument at the Very Large Telescope are pushing our understanding of gravity and of the central parts of our galax y to unprecedented precision. In particular\, I will present the first sel f-consistent test of the Parametrized Post-Newtonian parameters near a SMB H\; the discovery of a star sensitive to the spin of Sgr A*\; and the dete ction of orbital motion near the innermost stable circular orbit. I will c onclude by discussing how these results are just the first few steps on th e road to an experimental test of the no-hair theorem. LAST-MODIFIED:20260731T091836Z LOCATION:HB1 URL:http://the-center-of-gravity.com/calendar/event/98/ END:VEVENT BEGIN:VEVENT SUMMARY:The semiclassical energy outflux emerging from a collapsing shell — Noa Zilberman DTSTART;TZID=Europe/Copenhagen:20260728T131500 DTEND;TZID=Europe/Copenhagen:20260728T141500 DTSTAMP:20260917T041158Z UID:event-96@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20260727T085356Z DESCRIPTION:Noa Zilberman (Princeton University) When a compact object col lapses to form a black hole\, quantum field theory predicts the emission o f an energy outflux to future null infinity\, which later relaxes to Hawki ng radiation. Within the semiclassical framework\, we derive a simple\, cl osed form\, analytical expression for the energy outflux emitted from a sp herical thin null shell collapsing to form a black hole. In particular\, t his energy outflux vanishes (quadratically in r-2M) as the shell approache s the horizon. This result refutes claims that the Hawking energy outflux originates from the collapsing body\, showing instead that it develops in a broad strong-field region. Additionally\, this vanishing implies that se miclassical backreaction cannot prevent or significantly affect the classi cal process of gravitational collapse and horizon formation (as sometimes claimed). This talk is based on the joint work arXiv:2503.00622 with Amos Ori. LAST-MODIFIED:20260727T085432Z LOCATION:Auditorium A URL:http://the-center-of-gravity.com/calendar/event/96/ END:VEVENT BEGIN:VEVENT SUMMARY:Strong Seminar — Taillte May DTSTART;TZID=Europe/Copenhagen:20260820T131500 DTEND;TZID=Europe/Copenhagen:20260820T143000 DTSTAMP:20260917T041158Z UID:event-105@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20260916T080332Z DESCRIPTION:Title: Black hole perturbations\, nonlinearities\, and new phy sicsAbstract: Understanding and quantifying beyond leading order effects e nables more accurate tests of General Relativity and of physics beyond the Standard Model. Here I discuss vacuum gravitational perturbations as well as superradiant scalar\, vector\, and tensor boson perturbations. First\, I explore the nonlinear behavior of gravitational perturbations on a Kerr black hole. The ringdown gravitational wave signal\, during the final sta ge of binary black hole mergers\, contains important information about the properties of the remnant black hole\, and can be used to perform clean t ests of general relativity. However\, interpreting the loudest portion of the ringdown signal requires understanding the role of nonlinearities and their potential impact on modeling this phase using linearised theory. Nex t\, I discuss nonlinear effects in beyond the standard model particle dyna mics around black holes. Oscillating clouds of ultralight bosons can grow around spinning black holes through superradiance. This makes black hole o bservations powerful probes of ultralight bosonic fields. Understanding an d modelling nonlinear effects is important in accurately testing the exist ence of these fields. LAST-MODIFIED:20260916T080852Z LOCATION:Auditorium A URL:http://the-center-of-gravity.com/calendar/event/105/ END:VEVENT BEGIN:VEVENT SUMMARY:CoG Meetings — CoG Group DTSTART;TZID=Europe/Copenhagen:20260901T121500 DTEND;TZID=Europe/Copenhagen:20260901T131500 DTSTAMP:20260917T041158Z UID:event-101@the-center-of-gravity.com RRULE:FREQ=WEEKLY;UNTIL=20261215T225959Z;INTERVAL=2;BYDAY=TU EXDATE;TZID=Europe/Copenhagen:20261013T121500,20261027T121500 CATEGORIES:Meeting CREATED:20260831T162913Z LAST-MODIFIED:20260916T135747Z LOCATION:Hb1 URL:http://the-center-of-gravity.com/calendar/event/101/ END:VEVENT BEGIN:VEVENT SUMMARY:Strong Meetings — Strong Group DTSTART;TZID=Europe/Copenhagen:20260910T104500 DTEND;TZID=Europe/Copenhagen:20260910T120000 DTSTAMP:20260917T041158Z UID:event-50@the-center-of-gravity.com RRULE:FREQ=WEEKLY;UNTIL=20270620T215959Z;BYDAY=TH EXDATE;TZID=Europe/Copenhagen:20261217T104500,20261224T104500,20261231T104 500,20270107T104500,20270325T104500,20270506T104500 CATEGORIES:Meeting CREATED:20260408T053556Z LAST-MODIFIED:20260916T135225Z LOCATION:Hb1 URL:http://the-center-of-gravity.com/calendar/event/50/ END:VEVENT BEGIN:VEVENT SUMMARY:Strong Seminar — Thomas Sotiriou DTSTART;TZID=Europe/Copenhagen:20260910T131500 DTEND;TZID=Europe/Copenhagen:20260910T143000 DTSTAMP:20260917T041158Z UID:event-106@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20260916T080513Z DESCRIPTION:Title: Black hole hair and gravitational waves as probes of ne w physicsAbstract: The last 10 years gravitational wave observations have allowed us to finally probe the strong field\, nonlinear dynamics of gravi ty and have produced interesting bounds on deviations from General Relativ ity and the existence of new light fields. In the same period our theoreti cal understanding of how such deviation can arise and get imprinted on wav eforms have also progressed significantly. I will draw some lesson from th is theoretical progress and discuss how it can inform the way we search of new physics with gravitational waves. LAST-MODIFIED:20260916T080836Z LOCATION:Auditorium A URL:http://the-center-of-gravity.com/calendar/event/106/ END:VEVENT BEGIN:VEVENT SUMMARY:Motion Through Matter in Curved Space — Conor Dyson DTSTART;TZID=Europe/Copenhagen:20260911T103000 DTEND;TZID=Europe/Copenhagen:20260911T140000 DTSTAMP:20260917T041158Z UID:event-97@the-center-of-gravity.com CATEGORIES:PhD Defense CREATED:20260729T124256Z LAST-MODIFIED:20260729T124256Z LOCATION:Auditorium A URL:http://the-center-of-gravity.com/calendar/event/97/ END:VEVENT BEGIN:VEVENT SUMMARY:CoG Meetings — CoG Group DTSTART;TZID=Europe/Copenhagen:20260922T121500 DTEND;TZID=Europe/Copenhagen:20260922T131500 DTSTAMP:20260917T041158Z UID:event-102@the-center-of-gravity.com RRULE:FREQ=WEEKLY;UNTIL=20261215T225959Z;INTERVAL=2;BYDAY=TU CATEGORIES:Meeting CREATED:20260831T163150Z LAST-MODIFIED:20260831T163150Z LOCATION:Auditorium A URL:http://the-center-of-gravity.com/calendar/event/102/ END:VEVENT BEGIN:VEVENT SUMMARY:Strong Seminar — Sophia Yi DTSTART;TZID=Europe/Copenhagen:20261007T131500 DTEND;TZID=Europe/Copenhagen:20261007T143000 DTSTAMP:20260917T041158Z UID:event-107@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20260916T080628Z LAST-MODIFIED:20260916T080859Z LOCATION:Auditorium A URL:http://the-center-of-gravity.com/calendar/event/107/ END:VEVENT BEGIN:VEVENT SUMMARY:Strong Seminar — Richard Dyer DTSTART;TZID=Europe/Copenhagen:20261026T124500 DTEND;TZID=Europe/Copenhagen:20261026T140000 DTSTAMP:20260917T041158Z UID:event-108@the-center-of-gravity.com CATEGORIES:Seminar CREATED:20260916T082604Z LAST-MODIFIED:20260916T082604Z LOCATION:Auditorium A URL:http://the-center-of-gravity.com/calendar/event/108/ END:VEVENT BEGIN:VEVENT SUMMARY:CoG Meetings — CoG Group DTSTART;TZID=Europe/Copenhagen:20270105T121500 DTEND;TZID=Europe/Copenhagen:20270105T131500 DTSTAMP:20260917T041158Z UID:event-103@the-center-of-gravity.com RRULE:FREQ=WEEKLY;UNTIL=20270630T215959Z;INTERVAL=2;BYDAY=TU EXDATE;TZID=Europe/Copenhagen:20270216T121500,20270622T121500 CATEGORIES:Meeting CREATED:20260831T163557Z LAST-MODIFIED:20260916T140058Z LOCATION:Hb1 URL:http://the-center-of-gravity.com/calendar/event/103/ END:VEVENT BEGIN:VEVENT SUMMARY:CoG Meetings — CoG Group DTSTART;TZID=Europe/Copenhagen:20270112T121500 DTEND;TZID=Europe/Copenhagen:20270112T131500 DTSTAMP:20260917T041158Z UID:event-104@the-center-of-gravity.com RRULE:FREQ=WEEKLY;UNTIL=20270630T215959Z;INTERVAL=2;BYDAY=TU EXDATE;TZID=Europe/Copenhagen:20270309T121500,20270323T121500,20270629T121 500 CATEGORIES:Meeting CREATED:20260831T163748Z LAST-MODIFIED:20260916T140004Z LOCATION:Auditorium A URL:http://the-center-of-gravity.com/calendar/event/104/ END:VEVENT BEGIN:VEVENT SUMMARY:CoG Colloquium — Claudia de Rham DTSTART;TZID=Europe/Copenhagen:20270309T160000 DTEND;TZID=Europe/Copenhagen:20270309T170000 DTSTAMP:20260917T041158Z UID:event-100@the-center-of-gravity.com CATEGORIES:Colloquium CREATED:20260815T073614Z LAST-MODIFIED:20260916T141551Z LOCATION:Auditorium A URL:http://the-center-of-gravity.com/calendar/event/100/ END:VEVENT BEGIN:VEVENT SUMMARY:The Center of Gravity Inauguration DTSTART;VALUE=DATE:20250905 DTEND;VALUE=DATE:20250905 DTSTAMP:20260917T041158Z UID:page-39@the-center-of-gravity.com CREATED:20250619T075008Z LAST-MODIFIED:20251011T091124Z URL:http://the-center-of-gravity.com/features/the-center-of-gravity-inaugu ration/ END:VEVENT BEGIN:VEVENT SUMMARY:5th Meeting on Gravitational Wave Science in Scandinavia DTSTART;VALUE=DATE:20250515 DTEND;VALUE=DATE:20250515 DTSTAMP:20260917T041158Z UID:page-53@the-center-of-gravity.com CREATED:20250704T124200Z LAST-MODIFIED:20260507T103514Z URL:http://the-center-of-gravity.com/features/5th-meeting-on-gravitational -wave-science-in-scandinavia/ END:VEVENT BEGIN:VEVENT SUMMARY:The School on Gravity: From Motion to Commotion DTSTART;VALUE=DATE:20260622 DTEND;VALUE=DATE:20260627 DTSTAMP:20260917T041158Z UID:page-71@the-center-of-gravity.com CREATED:20250717T131420Z LAST-MODIFIED:20260818T050511Z URL:http://the-center-of-gravity.com/features/the-school-on-gravity-from-m otion-to-commotion-2026/ END:VEVENT BEGIN:VEVENT SUMMARY:Celebrating the First Decade of Gravitational Wave Astronomy DTSTART;VALUE=DATE:20250915 DTEND;VALUE=DATE:20250915 DTSTAMP:20260917T041158Z UID:page-82@the-center-of-gravity.com CREATED:20250904T082405Z LAST-MODIFIED:20251011T090947Z URL:http://the-center-of-gravity.com/features/celebrating-the-first-decade -of-gravitational-wave-astronomy/ END:VEVENT BEGIN:VEVENT SUMMARY:Reflections on Gravity - The Center of Gravity Retreat 2026 DTSTART;VALUE=DATE:20260903 DTEND;VALUE=DATE:20260905 DTSTAMP:20260917T041158Z UID:page-111@the-center-of-gravity.com CREATED:20251229T163753Z LAST-MODIFIED:20260910T091145Z URL:http://the-center-of-gravity.com/features/reflections-on-gravity-the-c enter-of-gravity-retreat-2026/ END:VEVENT BEGIN:VEVENT SUMMARY:The CoG Colloquia: A Tale of Many H0 DTSTART;TZID=Europe/Copenhagen:20260303T160000 DTEND;TZID=Europe/Copenhagen:20260303T170000 DTSTAMP:20260917T041158Z UID:page-116-session-1@the-center-of-gravity.com CATEGORIES:Colloquium CREATED:20260108T161013Z DESCRIPTION:Licia Verde is an ICREA professor at Instituto de Ciencias del Cosmos\, Universitat de Barcelona (ICCUB) where she leads the Cosmology & amp\; Large-Scale Structures research group. She is scientific director of the ICCUB and scientific director of JCAP. Her research focuses on the la rge-scale structure of the universe\, the cosmic microwave background\, ga laxy surveys and statistical tools to analyse and interpret cosmological d ata. LAST-MODIFIED:20260916T171850Z LOCATION:Niels Bohr Institute\, Auditorium A URL:http://the-center-of-gravity.com/features/the-cog-colloquia/the-speake rs/#block-34257c50-1907-412b-8b4f-1613da997f87 END:VEVENT BEGIN:VEVENT SUMMARY:The CoG Colloquia: Experimental Evidence for the Existence of Blac k Holes and their Cosmic Evolution Reinhard Genzel DTSTART;TZID=Europe/Copenhagen:20260421T160000 DTEND;TZID=Europe/Copenhagen:20260421T170000 DTSTAMP:20260917T041158Z UID:page-116-session-2@the-center-of-gravity.com CATEGORIES:Colloquium CREATED:20260108T161013Z DESCRIPTION:Reinhard Genzel is one of the Directors of Max Planck Institut e for Extraterrestrial Physics\, Professor in the Graduate School of the U niversity of California\, Berkeley and an Honorary Professor at the Ludwig Maximilian University\, Munich. In 2020\, he received the Nobel Prize in Physics\, jointly with Andrea Ghez\, for the discovery of a supermassive c ompact object at the centre of our galaxy. Through the development of cutt ing-edge infrared instrumentation\, his research has transformed our under standing of the extreme environments around black holes and the co-evoluti on of galaxies. These studies have also enabled remarkable tests of genera l relativity in the universe’s most extreme gravitational settings. LAST-MODIFIED:20260916T171850Z LOCATION:Niels Bohr Institute\, Auditorium A URL:http://the-center-of-gravity.com/features/the-cog-colloquia/the-speake rs/#block-ac5f3c2a-0676-451a-9813-f065760e9bb6 END:VEVENT BEGIN:VEVENT SUMMARY:The CoG Colloquia: What Wigner’s Friend Teaches Us About Quantum Gravity Paradoxes DTSTART;TZID=Europe/Copenhagen:20260602T160000 DTEND;TZID=Europe/Copenhagen:20260602T170000 DTSTAMP:20260917T041158Z UID:page-116-session-3@the-center-of-gravity.com CATEGORIES:Colloquium CREATED:20260108T161013Z DESCRIPTION:Renato Renner is Professor in the Department of Physics at ETH Zürich and Head of the Institute for Theoretical Physics. His research e xplores the deep intersection of physical laws and information theory. He is widely known for foundational contributions to quantum information\, in cluding the development of rigorous frameworks that establish the security of quantum communication. Beyond applications\, Renner’s work addresses profound conceptual questions at the heart of modern physics\, shedding l ight on how physical reality is described by different observers and how p rinciples of quantum information can inform our understanding of thermodyn amics\, gravity\, and the black hole information paradox. LAST-MODIFIED:20260916T171850Z LOCATION:Niels Bohr Institute\, Auditorium A URL:http://the-center-of-gravity.com/features/the-cog-colloquia/the-speake rs/#block-ced71b68-9981-44c9-be01-63a34770177b END:VEVENT BEGIN:VEVENT SUMMARY:The CoG Colloquia: Can Cosmology Decide? The Problem of Dark Energ y Pedro Ferreira DTSTART;TZID=Europe/Copenhagen:20261027T160000 DTEND;TZID=Europe/Copenhagen:20261027T170000 DTSTAMP:20260917T041158Z UID:page-116-session-4@the-center-of-gravity.com CATEGORIES:Colloquium CREATED:20260108T161013Z DESCRIPTION:Pedro G. Ferreira is the Head of Astrophysics at the Universit y of Oxford and the Director of the Beecroft Institute of Particle Physics and Cosmology. He studied and worked at Imperial College in London\, at t he University of California at Berkeley and at CERN in Geneva. He won the Gerald Whitrow Prize 2022 and the Eddington Medal 2024 of the Royal Astron omical Society. Professor Ferreira’s area of expertise is cosmology wher e he has studied the relic radiation left over from the Big Bang\, the nat ure of dark matter and dark energy\, and has led the way in studying alter natives to Einstein’s theory of General Relativity. His book\, “The Pe rfect Theory: A Century of Geniuses and the Battle over General Relativity ” was shortlisted for the 2014 Royal Society Winton Science Book Prize. LAST-MODIFIED:20260916T171850Z LOCATION:Niels Bohr Institute\, Auditorium A URL:http://the-center-of-gravity.com/features/the-cog-colloquia/the-speake rs/#block-74a95a56-666a-4b7b-9a77-fb51135a44cf END:VEVENT BEGIN:VEVENT SUMMARY:CoG Arts and Science Residency 2026: Application Opening DTSTART;VALUE=DATE:20260101 DTEND;VALUE=DATE:20260102 DTSTAMP:20260917T041158Z UID:page-120-session-12@the-center-of-gravity.com CREATED:20260116T062331Z DESCRIPTION:Art and science are different ways of expressing our human cu riosity and our desire to understand the cosmos. Both often involve deali ng with the unknown.The Center of Gravity (CoG) at the Niels Bohr Institut e (NBI) is a Center of Excellence to understand the gravitational interact ion and the cosmos. The Astrophysical and Cosmological Relativity (ACR) d epartment at the Max Planck Institute for Gravitational Physics (Albert E instein Institute\, AEI)\, excels in theoretical gravitational-wave resea rch. The CoG and ACR department are hubs for new ideas on the foundations of gravity and physics. To learn more about our work\, please use our we bsites: https://the-center-of-gravity.com/about-us/ and https://www.aei.mp g.de/astro-cosmo-rel. Together\, we are currently inviting proposals for artist residencies of up to three months at each site\, who will engage w ith the research of the CoG and the ACR department.We welcome original\, bold\, and ambitious proposals. Projects may take various forms across a rtistic disciplines\, including visual arts\, music\, literature\, and ot hers\, provided they engage with themes such as black holes\, gravitation al waves\, and the concept of time. LAST-MODIFIED:20260916T161024Z LOCATION:Online URL:http://the-center-of-gravity.com/features/cog-arts-and-science-residen cy-2026/about-the-residency/#block-c8c19904-ec15-47bd-b11e-b4ba6a1eb252 END:VEVENT BEGIN:VEVENT SUMMARY:CoG Arts and Science Residency 2026: Application Deadline DTSTART;VALUE=DATE:20260331 DTEND;VALUE=DATE:20260401 DTSTAMP:20260917T041158Z UID:page-120-session-13@the-center-of-gravity.com CREATED:20260116T062331Z DESCRIPTION:Art and science are different ways of expressing our human cu riosity and our desire to understand the cosmos. Both often involve deali ng with the unknown.The Center of Gravity (CoG) at the Niels Bohr Institut e (NBI) is a Center of Excellence to understand the gravitational interact ion and the cosmos. The Astrophysical and Cosmological Relativity (ACR) d epartment at the Max Planck Institute for Gravitational Physics (Albert E instein Institute\, AEI)\, excels in theoretical gravitational-wave resea rch. The CoG and ACR department are hubs for new ideas on the foundations of gravity and physics. To learn more about our work\, please use our we bsites: https://the-center-of-gravity.com/about-us/ and https://www.aei.mp g.de/astro-cosmo-rel. Together\, we are currently inviting proposals for artist residencies of up to three months at each site\, who will engage w ith the research of the CoG and the ACR department. We welcome original \, bold\, and ambitious proposals. Projects may take various forms across artistic disciplines\, including visual arts\, music\, literature\, and others\, provided they engage with themes such as black holes\, gravitati onal waves\, and the concept of time. LAST-MODIFIED:20260916T161024Z LOCATION:Online URL:http://the-center-of-gravity.com/features/cog-arts-and-science-residen cy-2026/about-the-residency/#block-c8c19904-ec15-47bd-b11e-b4ba6a1eb252 END:VEVENT BEGIN:VEVENT SUMMARY:Black Hole Week 2026: Paint Black Holes with Light! DTSTART;TZID=Europe/Copenhagen:20260822T120000 DTEND;TZID=Europe/Copenhagen:20260822T160000 DTSTAMP:20260917T041158Z UID:page-130-session-5@the-center-of-gravity.com CATEGORIES:Outreach CREATED:20260214T151650Z DESCRIPTION:Ready to meet a black hole? Join us at the Round Tower for a f amily-friendly workshop where science and art collide! Children of all age s can discover the mysteries of black holes with real scientists from the Center of Gravity at the Niels Bohr Institute. Start by exploring what bla ck holes are through fun talks led by experts. Then let your imagination t ake over as you draw your own black holes with crayons before creating glo wing works of art by painting with light. Along the way\, you'll experimen t\, ask big questions\, and uncover cosmic surprises through hands-on acti vities. Whether you're an aspiring astronaut\, an artist\, or simply curio us about the universe\, there's something for everyone. Come create\, expl ore\, and discover the invisible wonders of space! LAST-MODIFIED:20260916T172855Z LOCATION:The Round Tower URL:http://the-center-of-gravity.com/features/black-hole-week-2026/program /#block-0bd41243-599c-443d-8af9-f71ccd3b57a3 END:VEVENT BEGIN:VEVENT SUMMARY:Black Hole Week 2026: Discover Black Holes Through Comic Books! - Book launch DTSTART;TZID=Europe/Copenhagen:20260822T170000 DTEND;TZID=Europe/Copenhagen:20260822T180000 DTSTAMP:20260917T041158Z UID:page-130-session-6@the-center-of-gravity.com CATEGORIES:Outreach CREATED:20260214T151650Z DESCRIPTION:When scientists from the Niels Bohr Institute’s Center of Gr avity join forces with artists from Graphic Storytelling at TAW VIA in Vib org\, cutting-edge research on black holes transforms into fascinating vis ual stories. Join our book launch at Comic Garden\, and explore the comics on public display at Kongens Nytorv. More info at www.blackholecomicbook. com LAST-MODIFIED:20260916T172855Z LOCATION:Comic Garden URL:http://the-center-of-gravity.com/features/black-hole-week-2026/program /#block-9ca990b0-b106-4cb1-9aca-f47d2da860dc END:VEVENT BEGIN:VEVENT SUMMARY:Black Hole Week 2026: Discover Black Holes Through Comic Books! - Public display DTSTART;VALUE=DATE:20260820 DTEND;VALUE=DATE:20260830 DTSTAMP:20260917T041158Z UID:page-130-session-7@the-center-of-gravity.com CATEGORIES:Outreach CREATED:20260214T151650Z DESCRIPTION:When scientists from the Niels Bohr Institute’s Center of Gr avity join forces with artists from Graphic Storytelling at TAW VIA in Vib org\, cutting-edge research on black holes transforms into fascinating vis ual stories. Join our book launch at Comic Garden\, and explore the comics on public display at Kongens Nytorv. More info at www.blackholecomicbook. com LAST-MODIFIED:20260916T172855Z LOCATION:Kongens Nytorv URL:http://the-center-of-gravity.com/features/black-hole-week-2026/program /#block-9ca990b0-b106-4cb1-9aca-f47d2da860dc END:VEVENT BEGIN:VEVENT SUMMARY:Black Hole Week 2026: Black Holes: When Light Falls In DTSTART;TZID=Europe/Copenhagen:20260826T190000 DTEND;TZID=Europe/Copenhagen:20260826T200000 DTSTAMP:20260917T041158Z UID:page-130-session-8@the-center-of-gravity.com CATEGORIES:Outreach CREATED:20260214T151650Z DESCRIPTION:Black holes are among the most fascinating and mysterious obje cts in the universe. They bend space and time\, trap light\, and challenge everything we know about physics. But what exactly are black holes\, and how can we study something that cannot be seen? Join us at the Round Tower for an inspiring evening talk with Dr. Lorena Magaña Zertuche from the N iels Bohr Institute as we explore how black holes form\, what happens when light falls into them\, and how scientists use cutting-edge technology to uncover the secrets of these cosmic giants\, offering a fascinating glimp se into one of nature's greatest mysteries and the discoveries that are re shaping our understanding of the cosmos.Language: EnglishEntrance fee: 110 kr for adults\, 80 kr. for students\, free for childrenGet your tickets h ere LAST-MODIFIED:20260916T172855Z LOCATION:The Round Tower URL:http://the-center-of-gravity.com/features/black-hole-week-2026/program /#block-bfdd6534-e524-4753-a6f3-4e28fc75aa64 END:VEVENT BEGIN:VEVENT SUMMARY:Black Hole Week 2026: Your Borrowed Stardust DTSTART;TZID=Europe/Copenhagen:20260826T200000 DTEND;TZID=Europe/Copenhagen:20260826T231500 DTSTAMP:20260917T041158Z UID:page-130-session-9@the-center-of-gravity.com CATEGORIES:Outreach CREATED:20260214T151650Z DESCRIPTION:An immersive live performance connecting us to the edge of bla ck holes\, weaving movement\, spoken word\, live music\, and installation.  As an audience\, you will be invited to inhabit the shared space and par ticipate as we venture towards cosmological scales. Three opportunities in one night\, three journeys into the unknown\, each its own perturbation\ , each being a unique signal. Choose your entry on the 26th of August: P rimordial 20:00–20:45\; Binary 21:15–22:00\; Collision 22:30–23:1 5. Holding us at the event horizon\, this performance is an invitation to journey playfully into how we generate meaning as part of our cosmos. Buy your tickets here LAST-MODIFIED:20260916T172855Z LOCATION:KoncertKirken\, Blågårds Plads URL:http://the-center-of-gravity.com/features/black-hole-week-2026/program /#block-9a2a4fe3-dcaa-4357-8832-d8a46aec7b11 END:VEVENT BEGIN:VEVENT SUMMARY:Black Hole Week 2026: Between Science and Fiction DTSTART;TZID=Europe/Copenhagen:20260827T150000 DTEND;TZID=Europe/Copenhagen:20260827T160000 DTSTAMP:20260917T041158Z UID:page-130-session-10@the-center-of-gravity.com CATEGORIES:Outreach CREATED:20260214T151650Z DESCRIPTION:Where does science end and science fiction begin? Join us at G loria Biograf for a special screening of Gravity\, preceded by an introduc tion from physicists at the Center of Gravity. Together\, we will explore the real science of gravity and the physics of space\, and how our underst anding of the universe inspires the worlds we imagine on screen.Get your t ickets here LAST-MODIFIED:20260916T172855Z LOCATION:Gloria Biograf URL:http://the-center-of-gravity.com/features/black-hole-week-2026/program /#block-ba70a6c3-6cc7-4922-b6c3-d387ec8155cc END:VEVENT BEGIN:VEVENT SUMMARY:Black Hole Week 2026: Science & Cocktails DTSTART;TZID=Europe/Copenhagen:20260829T190000 DTEND;TZID=Europe/Copenhagen:20260829T200000 DTSTAMP:20260917T041158Z UID:page-130-session-11@the-center-of-gravity.com CATEGORIES:Outreach CREATED:20260214T151650Z DESCRIPTION:Come and join us for a cocktail\, while some of the world-lead ing figures in science explain what black holes are\, how we see them and why we want to know them. A mojito will do. More information can be found here. LAST-MODIFIED:20260916T172855Z LOCATION:DR Koncerthuset URL:http://the-center-of-gravity.com/features/black-hole-week-2026/program /#block-a6b3c6d3-5668-4127-82fe-932e860744d8 END:VEVENT END:VCALENDAR