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PRODID:UW-Madison-Physics-Events
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UID:UW-Physics-Event-4308
DTSTART:20161020T203000Z
DTEND:20161020T220000Z
DTSTAMP:20240319T092312Z
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.
\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.
\nIn fact\, the physical mechanisms controlling accr
etion disk coronae remain largely unknown.
\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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