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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
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SEQUENCE:3
UID:UW-Physics-Event-8973
DTSTART:20251031T203000Z
DTEND:20251031T213000Z
DTSTAMP:20260413T083854Z
LAST-MODIFIED:20251027T135243Z
LOCATION:Chamberlin 2241
SUMMARY:Stellar Graveyards and Shifting Paradigms in Gravitational-wav
 e Astrophysics\, Physics Department Colloquium\, Imre Bartos\, Univers
 ity of Florida
DESCRIPTION:Gravitational-wave astronomy has transformed our understan
 ding of the universe’s most extreme objects. In less than a decade\,
  the LIGO and Virgo observatories have revealed a rich population of m
 erging black holes and neutron stars\, uncovering systems that challen
 ge long-standing expectations from stellar evolution. We now see black
  holes that are heavier\, more numerous\, and sometimes more complex t
 han any previously known\, hinting at environments where they can coll
 ide\, merge\, and grow repeatedly. One such environment may lie in the
  accretion disks of active galactic nuclei\, which can act as cosmic â
 €śstellar graveyards” that serve as black-hole assembly lines. In th
 ese dense\, gas-rich regions\, black holes may form binaries\, merge m
 ultiple times\, and even produce electromagnetic or neutrino counterpa
 rts. In this talk I will first review how gravitational-wave discoveri
 es have reshaped astrophysics\, highlighting what we have learned abou
 t compact objects and their origins. I will then explore how the AGN-d
 isk scenario may represent the next paradigm shift\, connecting gravit
 ational waves and electromagnetic radiation into a unified multimessen
 ger picture.
URL:https://www.physics.wisc.edu/events/?id=8973
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