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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-4308
DTSTART:20161020T203000Z
DTEND:20161020T220000Z
DTSTAMP:20260419T060122Z
LAST-MODIFIED:20160927T204322Z
LOCATION:4421 Sterling Hall\, Coffee and cookies 3:30 PM\, Talk at 3:4
 5 PM
SUMMARY:A Connection Between Stellar Coronae and Black-Hole Accretion-
 Disk Coronae\, Astronomy Colloquium\, Prof. Ehud Behar\, Department of
  Physics and  Asher Space Research Institute Technion\, Visiting Profe
 ssor Department of Astronomy University of Maryland\, College Park
DESCRIPTION:Stellar coronae are known for their million degree plasma 
 that is magnetically energized and emits bright X-rays.<br>
\nThe X-ra
 y source in black hole accretion disks is also referred to as a corona
 \, although its observed properties\, e.g.\, spectra\, luminosity\, te
 mperature\, and variability are remarkably different from those of ste
 llar coronae.<br>
\nIn fact\, the physical mechanisms controlling accr
 etion disk coronae remain largely unknown.<br>
\nThe colloquium will s
 how that radio and mm observations of active galaxies (AGN) could be k
 ey to understanding the X-ray coronae of super-massive black holes. Th
 ese suggest that perhaps stellar and accretion-disk coronae have more 
 in common than meets the eye (or the telescope).
URL:https://www.physics.wisc.edu/events/?id=4308
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