Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..apr.e2002m&link_type=abstract
American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As
Astronomy and Astrophysics
Astrophysics
Scientific paper
Galaxy cluster surveys that probe the high redshift (z>0.5) universe can potentially provide a wealth of information about the amount and nature of the dark matter and dark energy. Interpreting these surveys requires accurate connections between the cluster virial mass and the cluster observables like the X-ray luminosity, the Sunyaev-Zeldovich effect luminosity and the X-ray emission weighted temperature. These mass-temperature or mass-luminosity scaling relations are expected to evolve with redshift, reflecting the increasing density of the universe at higher redshift. We test these expectations by examining cluster scaling relations at different redshifts. The new Chandra and XMM-Newton observatories allow studies of cluster scaling relations out to intermediate and high redshift with much higher precision than possible with previous missions. We present the results of an ongoing analysis of the evolution of galaxy cluster scaling relations carried out with data from Chandra, other X-ray missions, and cm-wave radio observations. To date, our analysis reveals evolution of cluster structure on the scale of the virial region that appears to be consistent with theoretical expectations.
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