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PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:2
UID:UW-Physics-Event-6698
DTSTART:20211028T203000Z
DTEND:20211028T220000Z
DTSTAMP:20260414T192235Z
LAST-MODIFIED:20211025T194917Z
LOCATION:4421 Sterling Hall\, Coffee and Cookies at 3:30 pm\, Talk sta
 rts at 3:45 pm
SUMMARY:Probing Dynamic Intracluster Medium: Insights from X-ray Surfa
 ce Brightness Fluctuations\, Astronomy Colloquium\, Irina Zhuravleva \
 , University of Chicago
DESCRIPTION:Clusters of galaxies are mainly filled with dark matter an
 d hot\, X-ray emitting gas. They evolve through matter accretion along
  cosmic filaments\, violent mergers\, feedback from active galactic nu
 clei (AGN). Despite being very dynamic environments\, the processes th
 at drive gas motions in the intracluster medium (ICM)\, the properties
  of turbulence and relevant plasma physics remain poorly explored. In 
 this talk\, I will mainly focus on observational efforts to probe thes
 e physics. A recent analysis of X-ray surface brightness fluctuations 
 in the central regions of bright\, nearby galaxy clusters provided con
 straints on velocity power spectra\, effective equation of state of sm
 all-scale perturbations produced by AGN feedback\, and directly probed
  how magnetic fields modify small-scale density perturbations of the g
 as\, affecting its transport properties. At the end of the talk\, exci
 ting possibilities to probe gas motions and plasma physics in the ICM 
 with near-future XRISM observatory will be discussed.<br>
\n
\nWe stro
 ngly encourage you to attend the colloquium in person. If that is
\nim
 possible\, it is available over zoom at the following link:
\n
\nhttps
 ://uwmadison.zoom.us/j/97022414044?pwd=cnljYzF0cFZJMUhiWkNWUnkvVDBZZz0
 9
\n
URL:https://www.physics.wisc.edu/events/?id=6698
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