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SUMMARY:What Can Tidal Disruption Events Teach Us About Black Hole Accreti
 on? - Mitch Begelman\, JILA Colorado
DTSTART:20150219T163000Z
DTEND:20150219T173000Z
UID:TALK57136@talks.cam.ac.uk
CONTACT:Simon Hodgkin
DESCRIPTION:For a year or more after a star is tidally disrupted by a blac
 k hole\, debris can fall back at a rate that greatly exceeds the Eddington
  limit.   Both observations and theoretical arguments indicate that mass l
 oss is unable to regulate the rate at which matter is actually swallowed b
 y the hole\, leading to black hole growth rates and energy outputs that ca
 n exceed the Eddington limit by orders of magnitude.   I will explain why 
 regulation fails in such a case\, and how this alternate mode of black hol
 e growth could also be crucial for gamma-ray bursts and the rapid growth o
 f supermassive black holes during the epoch of galaxy formation.   I will 
 also suggest that hyperaccreting black holes may be associated with the fa
 stest jets\, and that these are propelled by radiation pressure instead of
  magnetic forces.
LOCATION:Sackler Lecture Theatre\, IoA (tea at 4:00 pm)
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