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CATEGORIES:Galaxies Discussion Group
SUMMARY:How do the most luminous black holes accrete and e
 xpel gas? - Matthew Liska (Georgia Tech)
DTSTART;TZID=Europe/London:20250509T113000
DTEND;TZID=Europe/London:20250509T123000
UID:TALK230116AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/230116
DESCRIPTION:The gravitational pull of a black hole attracts ga
 s and forms an accretion disk where the interplay 
 between hydromagnetic processes and the warping of
  space-time releases gravitational energy in the f
 orm of radiation\, relativistic jets\, and winds. 
 Most gas falls into supermassive black holes when 
 the accretion rate approaches the Eddington limit 
 (L=Ledd)\, at which point radiation pressure overc
 omes gravity. To date\, our knowledge of such `lum
 inous’ black hole accretion disks mostly relies on
  semi-analytical models\, supplemented by a limite
 d set of numerical simulations. In my talk I will 
 discuss new insights gained from state-of-the-art 
 radiative general relativistic magnetohydrodynamic
 s (GRMHD) simulations of accretion near the Edding
 ton limit such as the formation of a hot corona\, 
 disk truncation\, and other physical processes dri
 ving the spectral evolution of luminous black hole
 s. I will finish my talk by discussing the challen
 ges and opportunities the next-generation of GRMHD
  simulations will bring in developing a comprehens
 ive understanding of black hole accretion across t
 he luminosity spectrum.\n
LOCATION:Hoyle Lecture Theatre 
CONTACT:Sandro Tacchella
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