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PRODID:https://murmitoyen.com/events/vanille/udem/
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UID:69dad4bb103dc
DTSTAMP:20260411T190947
DTSTART:20180227T103000
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DTEND:20180227T103000
URL:https://murmitoyen.com/events/vanille/udem/detail/810347-clusters-of-ga
 laxies-as-astrophysical-laboratories
LOCATION:Université de Montréal - Pavillon Claire-McNicoll\, 2900\, chemi
 n de la Tour\, Montréal\, QC\, Canada\, H3T 1J6
SUMMARY:Clusters of galaxies as astrophysical laboratories
DESCRIPTION:Conférencière :Irina Zhuravleva (Stanford)
\nClusters of gala
 xies are the largest\, gravitationally-bound objects in the Universe. They
  are mainly filled with dark matter\, hot\, X-ray-emitting gas and stars. 
 Being the largest and most massive\, clusters are important cosmological p
 robes for tracing the growth of structures in the Universe over time. X-ra
 y\, radio and sub-millimeter observations allow us to study a variety of a
 strophysical phenomena in the hot gas\, the evolution of giant elliptical 
 galaxies\, the interactions between supermassive black holes and intraclus
 ter medium (ICM). Despite significant progress over the past decade\, ther
 e are still many questions which are poorly understood. What are the prope
 rties of turbulence and bulk motions of the gas? How do supermassive black
  holes transfer their energy to the ICM? How important are transport proce
 sses\, such as gas viscosity and thermal conduction? Does magnetic field a
 ffect the ICM plasma? How to accelerate particles and explain the origin o
 f the observed radio halos? In my talk\, I will discuss recent progress th
 at has been done to address these questions. In particular\, I will show h
 ow X-ray images of galaxy clusters can be used to measure velocity power s
 pectra\, the equation of state of gas perturbations driven by the black ho
 le - hot gas interaction\, and to directly see the effects of magnetic fie
 lds and plasma instabilities on hot gas. I will highlight recent results f
 rom new\, high-resolution spectral data from the Hitomi satellite. Finally
 \, I will discuss near and more distant future perspectives in the field.
  
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