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UID:69db741649446
DTSTAMP:20260412T062942
DTSTART:20170921T123000
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URL:https://murmitoyen.com/events/vanille/udem/detail/784934-fade-to-black-
 the-origin-of-changing-look-quasars-john-ruan-mcgill
LOCATION:Pavillon Roger-Gaudry \, 2900\, boul. Édouard-Montpetit\, Local M
 -415\, Montréal\, QC\, Canada
SUMMARY:Fade to Black: The Origin of Changing-Look Quasars - John Ruan (McG
 ill)
DESCRIPTION:Résumé:
\n 
\nThe proliferation of wide-field multi-epoch im
 aging surveys has now opened a new window to the time-domain for discovery
  of new and rare time-variable phenomena. From these surveys\, the recent 
 discovery of ‘changing-look’ quasars poses potential challenges to our u
 nderstanding of accretion onto supermassive black holes. In this phenomeno
 n\, luminous quasars suddenly fade into quiescent galaxies over timescales
  of just a few years\, a factor of 10000 faster than expected. I will exam
 ine different explanations for the origin of changing-look quasars\, and d
 iscuss their incredible usefulness in probing accretion physics\, supermas
 sive black hole feedback\, and galaxy evolution over cosmic time.
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