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SUMMARY:What Really Makes an Accretion Disk MAD - Prof. Mitchell C. Begelm
 an (University of Colorado\, Boulder)
DTSTART:20230518T150000Z
DTEND:20230518T160000Z
UID:TALK201046@talks.cam.ac.uk
CONTACT:107123
DESCRIPTION:The concept of a Magnetically Arrested Disk (MAD) is interesti
 ng because it provides a way to maximize the extraction of spin energy fro
 m the central black hole\, potentially powering jets.  But how and whether
  they can be formed in nature is controversial.  I will discuss some basic
  physical ideas underpinning MADs and argue that they may be relatively ea
 sy to form and maintain\, but not quite in the way proponents have suggest
 ed.   In addition to being a key element in modeling results from the Even
 t Horizon Telescope\, MADs may be crucial for solving a number of longstan
 ding puzzles in accretion disk theory.\n
LOCATION:Hoyle Lecture Theatre - Details will be sent by email
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