Distant X-ray Galaxy Clusters

Details Distant X-ray Galaxy Clusters Distant X-ray Galaxy Clusters

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop...17f&link_type=abstract

Spitzer Proposal ID #17

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Scientific paper

We will measure the rest-frame 1.6um luminosity function of galaxies in x-ray selected clusters with z > 0.6. We expect to reach a depth of L*+4 at z=1. The sample consists of about 40 clusters with redshifts of up to 2.2, primarily selected from the Rosat Deep Cluster Survey, augmented by other clusters with z > 0.6 and known to have x-ray emission, and a few z > 1 clusters around radio galaxies for which the velocity dispersion or Faraday rotation implies a massive cluster is present. Locally, rest 1.6um emission correlates linearly with a galaxy's dynamical mass. X-ray emission arises from the intracluster medium, which dominates the baryonic mass in local galaxy clusters. Hence the 1.6um luminosity function in x-ray selected clusters as a function of redshift can be usefully compared to models for the growth of structure.

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