Events List

DateEvent TypeSpeaker
04/01/2025Astro SeminarBart Ripperda [ + ]
04/01/2025Informal Astro TalkRaagini Patki [ + ]
04/02/2025HEP Journal Club [ + ]
04/02/2025HEP SeminarCsaba Csaki [ + ]
04/03/2025Physics Dept ColloquiumAlessandra Buonanno [ + ]
04/04/2025Special SeminarDalimil Mazac [ + ]
04/04/2025Hep-Th Discussion SessionCalkins [ + ]
04/08/2025Astro SeminarMagdalena Siwek [ -- ]

Title: Signatures of Circumbinary Disk Dynamics in Astrophysical Binary Populations
Abstract: Pulsar Timing Arrays (PTAs) have found compelling evidence for the existence of a Gravitational Wave Background (GWB): a ‘hum’ of low-frequency gravitational waves that permeates the Universe, emitted by the loudest gravitational wave (GW) sources in the Universe: Massive Black Hole Binaries (MBHBs). In gas-rich galactic nuclei, MBHB evolution is expected to be accompanied by interaction with circumbinary accretion disks (CBDs). In this talk I will show that, i) accretion from CBDs increases the amplitude of the GWB, but that CBD-induced orbital expansion has a negligible effect, ii) the mass ratio evolution and `eccentricity attractor' derived from CBD simulations is expected to induce a strong signature in the MBHB population, and that iii) evidence for such a signature has already been found in stellar binaries. Finally, I will discuss how the accretion from CBDs may enable multi-messenger detection of these systems through electromagnetic follow-up, and present preliminary models of the diverse electromagnetic signatures emitted by MBHBs in CBDs. (2:00 PM - 3:00 PM, 726 Broadway, 940, CCPP Seminar)
04/09/2025HEP Journal Club [ + ]
04/09/2025HEP SeminarLorenzo Ricci [ + ]
04/09/2025Cosmic Happy HourCammie Norton [ + ]
04/10/2025Physics Dept ColloquiumJesse Thaler [ + ]
04/11/2025Hep-Th Discussion SessionCalkins [ + ]
04/14/2025Special SeminarMisha Shaposhnikov [ + ]
04/15/2025Astro SeminarJulien Lavalle [ + ]
04/16/2025HEP Journal Club [ + ]
04/16/2025HEP SeminarMichael Baker [ + ]
04/18/2025Hep-Th Discussion SessionCalkins [ + ]
04/21/2025CCPP Brown BagMarius Kongsore [ + ]
04/21/2025Informal HEP TalkNat Levine [ + ]
04/22/2025Astro SeminarGabriela Sato-Polito [ + ]
04/23/2025HEP Journal Club [ + ]
04/23/2025HEP SeminarGiovanni Villadoro [ + ]
04/25/2025Informal HEP TalkWeiguang Cao [ + ]
04/25/2025Hep-Th Discussion SessionCalkins [ + ]
04/28/2025CCPP Brown BagMarcus DuPont [ + ]
04/29/2025Astro SeminarRisa Wechsler [ + ]
04/29/2025Oral DefenseJoan La Madrid [ + ]
04/30/2025Oral DefenseCalvin Chen [ + ]
04/30/2025HEP SeminarHarikrishnan Ramani [ + ]
04/30/2025HEP Journal Club [ + ]
05/01/2025Physics Dept ColloquiumLyman Page [ + ]
05/02/2025Hep-Th Discussion SessionCalkins [ + ]
05/06/2025Astro SeminarTetyana Pitik [ + ]
05/07/2025HEP Journal Club [ + ]
05/07/2025HEP SeminarHowie Haber [ + ]
05/07/2025HEP SeminarHowie Haber [ + ]
05/09/2025Hep-Th Discussion SessionCalkins [ + ]
05/14/2025HEP Journal Club [ + ]
09/11/2025Physics Dept ColloquiumWendy Freeman [ + ]