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SUMMARY:Probing Black Hole Winds with SimBAL: Mapping the Physics of Broad
  Absorption Line Quasar Outflows - Hyunseop (Joseph) Choi (Université de 
 Montréal)
DTSTART:20250410T103000Z
DTEND:20250410T110000Z
UID:TALK229804@talks.cam.ac.uk
CONTACT:Steven Brereton
DESCRIPTION:Broad absorption line (BAL) quasars provide striking evidence 
 of energetic winds driven by accreting supermassive black holes. These out
 flows are thought to play a crucial role in regulating black hole growth a
 nd the host star formation rate\, as well as shaping the evolution of gala
 xies\; however\, their physical properties—such as radius and energetics
 —remain poorly constrained. Our group has developed SimBAL\, a spectral 
 synthesis tool that enables detailed\, physically motivated modeling of BA
 L quasar spectra. It has allowed us to perform a detailed spectral analysi
 s of a large sample of BAL quasars for the first time and to characterize 
 multi-phase outflows in a quasar discovered at the Epoch of Reionization. 
 I will demonstrate SimBAL's unique strengths by discussing the results fro
 m several projects and how our group has taken a systematic approach to in
 vestigate the physics of black hole winds. Lastly\, I will introduce the 4
 MOST–Gaia Purely Astrometric Quasar Survey\, an upcoming spectroscopic s
 urvey uniquely designed to deliver the first large-scale\, color-independe
 nt quasar reference sample.
LOCATION:Ryle Meeting Room\, KICC
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