BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-3336
DTSTART:20140417T203000Z
DTEND:20140417T100000Z
DTSTAMP:20260419T193434Z
LAST-MODIFIED:20140325T141914Z
LOCATION:4421 Sterling Hall
SUMMARY:The Fermi Bubbles: Possible Nearby Laboratory for AGN Jet Acti
 vity\, Astronomy Colloquium\, Karen Yang\, University of Michigan
DESCRIPTION:One of the most important discoveries of the Fermi Gamma-r
 ay Space Telescope is the detection of two giant bubbles extending 50 
 degrees above and below the Galactic center (GC). The symmetry about t
 he GC of the Fermi bubbles suggests some episode of energy injection f
 rom the GC\, possibly related to past jet activity of the central acti
 ve galactic nuclei (AGN). Thanks to the proximity to the GC\, the Ferm
 i Bubbles are excellent laboratories for studying cosmic rays (CRs)\, 
 Galactic magnetic field\, and AGN feedback in general. Using three-dim
 ensional magnetohydrodynamic simulations that include relevant CR phys
 ics\, I will show how leptonic AGN jets can explain the key characteri
 stics of the Fermi bubbles and the spatially correlated features obser
 ved in the X-ray\, microwave\, and radio wavelengths. I will also disc
 uss how we use our simulations in combination with the multi-wavelengt
 h data to obtain constraints on the composition of the Fermi bubbles. 
URL:https://www.physics.wisc.edu/events/?id=3336
END:VEVENT
END:VCALENDAR