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UID:UW-Physics-Event-8420
DTSTART:20230928T203000Z
DTEND:20230928T213000Z
DTSTAMP:20260414T051707Z
LAST-MODIFIED:20230908T174232Z
LOCATION:4421 Sterling Hall
SUMMARY:The Census of Supermassive Black Holes over Cosmic Time\, Astr
 onomy Colloquium\, Jonathan Trump\, University of Connecticut
DESCRIPTION:Supermassive black holes are a critical ingredient in our 
 Universe. They are the most luminous persistent sources in the sky\, i
 n both photons and gravitational waves\, and they play an essential ro
 le in the formation and growth of galaxies. My research seeks a compre
 hensive census of black holes using two complementary approaches. Firs
 t\, I will show how pioneering new SDSS time-domain spectroscopy enabl
 es a census of black hole mass\, growth rate\, and spin over most of c
 osmic time. I will also present the forecast for Rubin/LSST discovery 
 of binary black holes: the electromagnetic counterparts to gravitation
 al echoes seen in pulsar timing and (eventually) LISA. Meanwhile the f
 irst year of JWST observations has revealed a surprisingly active earl
 y Universe\, with a large number of massive black holes identified in 
 z>5 galaxies. This implies a significant population of heavy black hol
 e seeds and suggests that accreting black hole play a significant role
  in reionizing the Universe. The next generation of time-domain\, spac
 e-telescope\, and multi-messenger experiments make it a truly bright t
 ime for understanding the dark nature of black hole astrophysics.
URL:https://www.physics.wisc.edu/events/?id=8420
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