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PRODID:UW-Madison-Physics-Events
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UID:UW-Physics-Event-4745
DTSTART:20180215T213000Z
DTEND:20180215T230000Z
DTSTAMP:20260419T054857Z
LAST-MODIFIED:20180206T203242Z
LOCATION:4421 Sterling Hall\, Coffee at 3:30 pm\, Talk begins 3:45 pm
SUMMARY:The Microphysics of AGN Feedback \, Astronomy Colloquium\, Kar
 en Yang\, University of Maryland
DESCRIPTION:Feedback from active galactic nuclei (AGN) is one of the m
 ost important processes governing the formation and evolution of galax
 ies and galaxy clusters. It is believed to be responsible for inhibiti
 ng the formation of massive galaxies and for solving the long-standing
  "cooling-flow problem" in galaxy clusters. A lot of understanding of 
 AGN feedback has been gained using hydrodynamic simulations\; however\
 , some of the relevant physical processes are unresolvable or not capt
 ured by pure hydrodynamics\, such as plasma effects and cosmic-ray (CR
 ) physics. In this talk\, I will present how we use simulations that i
 ncorporate this "microphysics" to understand how AGN jets feedback on 
 galactic and cluster scales. Specifically\, I will discuss the roles o
 f thermal conduction and CRs in addition to purely hydrodynamic models
 . I will also talk about how we could use multi-messenger observations
  of the Fermi bubbles as a nearby aboratory for studying AGN feedback.
  Finally\, I will conclude with open questions and future prospects of
  applying simulations beyond hydrodynamics to various interesting astr
 ophysical systems.
URL:https://www.physics.wisc.edu/events/?id=4745
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