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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-1555
DTSTART:20090605T203000Z
DTEND:20090605T220000Z
DTSTAMP:20260422T213800Z
LAST-MODIFIED:20090529T165338Z
LOCATION:4534 Sterling Hall
SUMMARY:Clustering of accreting supermassive blackholes: An X-ray pers
 pective\, SPECIAL SEMINAR TALK\, Yuxuan Yang\, University of Illinois
DESCRIPTION:> n the CDM structure formation scenario galaxies traces t
 he large scale structure in a biased way. On large scales\, the bias i
 s determined by the mass of the galaxies.  Recent advances in large ar
 ea surveys have made it possible for very accurate statistical studies
  of galaxies in the context of structure formation. Such studies have 
 revealed some interesting correlations between galaxy properties and t
 heir large scale bias.  Active galactic nuclei (AGNs) play an importan
 t role in galaxy formation. Correlations between AGN properties and th
 eir bias provides an interesting perspective on the host galaxy of AGN
 s and their dark matter halos. Observationally\, AGNs selected in diff
 erent electromagnetic wave bands selects particular features of AGNs i
 n those bands. Hard X-ray emission from AGNs originates from the inner
  accretion disk. The radiation is close to isotropic and is not strong
 ly affected by absorption. Comparing to selection methods optical or I
 R\, hard X-ray yields the least biased sample of accreting supermassiv
 e blackholes. In this talk\, I discuss some recent progress in the stu
 dy of AGN clustering using hard X-ray observations. I also present som
 e new results using data from Chandra surveys (CLASXS\, CLANS\, CDFN\,
  CDFS)\, and the SWIFT/BAT survey. The combination of low and high red
 shift AGN sample allow us to constrain on the evolutionary stage of AG
 N host galaxies.<br>
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URL:https://www.physics.wisc.edu/events/?id=1555
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