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SUMMARY:How do the most luminous black holes accrete and expel gas? - Matt
 hew Liska (Georgia Tech)
DTSTART:20250509T103000Z
DTEND:20250509T113000Z
UID:TALK230116@talks.cam.ac.uk
CONTACT:Sandro Tacchella
DESCRIPTION:The gravitational pull of a black hole attracts gas and forms 
 an accretion disk where the interplay between hydromagnetic processes and 
 the warping of space-time releases gravitational energy in the form of rad
 iation\, relativistic jets\, and winds. Most gas falls into supermassive b
 lack holes when the accretion rate approaches the Eddington limit (L=Ledd)
 \, at which point radiation pressure overcomes gravity. To date\, our know
 ledge of such `luminous’ black hole accretion disks mostly relies on sem
 i-analytical models\, supplemented by a limited set of numerical simulatio
 ns. In my talk I will discuss new insights gained from state-of-the-art ra
 diative general relativistic magnetohydrodynamics (GRMHD) simulations of a
 ccretion near the Eddington limit such as the formation of a hot corona\, 
 disk truncation\, and other physical processes driving the spectral evolut
 ion of luminous black holes. I will finish my talk by discussing the chall
 enges and opportunities the next-generation of GRMHD simulations will brin
 g in developing a comprehensive understanding of black hole accretion acro
 ss the luminosity spectrum.\n
LOCATION:Hoyle Lecture Theatre 
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