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UID:UW-Physics-Event-3911
DTSTART:20160422T203000Z
DTEND:20160422T213000Z
DTSTAMP:20260308T041730Z
LAST-MODIFIED:20160419T162146Z
LOCATION:2241 Chamberlin Hall
SUMMARY:First Results from Hitomi\, Physics Department Colloquium\, Ri
 chard Mushotzky\, University of Maryland/Goddard Space Flight Center
DESCRIPTION:I will present the Hitomi mission and its present status. 
 Hitomi is a Japanese/US x-ray spectroscopy satellite that was launched
  in Feb 2016. It carried a wide range of instruments but I will focus 
 on the results from the Soft X-ray Spectrometer\, a new technology x-r
 ay spectrometer with an energy resolution of  ~4.9 eV \,~30x better th
 an previously achieved in the E>2 keV band.  The  first observation wa
 s that of the Perseus cluster\, a nearby very luminous cluster of gala
 xies and the prototype for the interaction of  an active galaxy and th
 e x-emitting hot gas in the cluster. The hot gas is the dominant baryo
 nic component in the cluster and its physical properties are crucial t
 o understanding  how clusters\, the largest structures in the universe
 \, form and evolve.  <br>
\nThe SXS measured for the first time  the v
 elocity field of the  hot gas and shows the power of precision x-ray s
 pectroscopy . The richness of this data set will allow future measurem
 ents of the abundance of several elements to better than 5% precision\
 , constraints on resonance scattering and already has challenged prese
 nt atomic physics models.
URL:https://www.physics.wisc.edu/events/?id=3911
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