BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:3
UID:UW-Physics-Event-5138
DTSTART:20191115T213000Z
DURATION:PT1H0M0S
DTSTAMP:20260415T061028Z
LAST-MODIFIED:20191111T193210Z
LOCATION:2241 Chamberlin Hall
SUMMARY:Black Hole Ergomagnetospheres\, Electromagnetic Jets and Eject
 ion Disks\, Physics Department Colloquium\,  Roger Blandford\, KIPAC\,
  Stanford
DESCRIPTION:Recent\, remarkable  images made by the EHT collaboration 
 exhibit a ring of emission\, presumably orbiting a six billion solar m
 ass black hole. It is proposed that what is observed is not a gas toru
 s but an extensive “ ergomagnetosphere" that connects mechanically t
 o a much larger ``ejection disk’’ and that\,  in sources like M87\
 , the electromagnetic jets and the disk are mostly powered by black ho
 le spin\, not accretion. Implications for general active galactic nucl
 ei and other sources of relativistic jets will be briefly discussed.
URL:https://www.physics.wisc.edu/events/?id=5138
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