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SUMMARY:The Phase Space of Clusters at z ~ 1 as a Tool for Understanding t
 he Satellite Quenching Process - Adam Muzzin (Leiden Observatory)
DTSTART:20140221T143000Z
DTEND:20140221T153000Z
UID:TALK50997@talks.cam.ac.uk
DESCRIPTION:The position vs. velocity phase space of cluster galaxies enco
 des the accretion history of galaxies onto the cluster\, and is therefore 
 a powerful tool for differentiating between dynamically-young and   dynami
 cally-old populations. Using a sample of > 400 spectroscopic  members in 1
 0 rich clusters at z ~ 1 from the GCLASS survey\, I will show that the pop
 ulations of quiescent\, star-forming\, and post-starburst galaxies in the 
 clusters reside in distinctive regions of\nposition-velocity phase space. 
 In particular\, post-starburst galaxies are located in a "ring" at small c
 lustercentric radii\, but high clustercentric velocities. A comparison to 
 numerical simulations shows that we can reproduce the phase space location
  of the post-starbursts if they are the descendants of a star-forming popu
 lation that quench\nrapidly after their first crossing of approximately ha
 lf the cluster\nvirial radius. This location and timescale for quenching p
 rovide some\nconstraints on the possible mechanisms for environmental quen
 ching\, and\nI will discuss these.
LOCATION:Martin Ryle Seminar Room\, KICC
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