AAS 201st Meeting, January, 2003
Session 5. Galaxy Clusters and Cosmology
Poster, Monday, January 6, 2003, 9:20am-6:30pm, Exhibit Hall AB

[Previous] | [Session 5] | [Next]

[5.02] The Isodecrement Size-Temperature Scaling Relation

E.D. Reese (UC Berkeley), J.J. Mohr (University of Illinois, Urbana-Champaign), J.E. Carlstrom (University of Chicago)

Clusters of galaxies appear to be regular objects, illustrated by scaling relations of global properties of galaxy clusters. Nearby galaxy clusters and simulations of galaxy clusters show a tight correlation between the X-ray isophotal size of a galaxy cluster and its X-ray temperature. With a simple model for clusters and standard models for the redshift evolution of clusters we expect that the X-ray isophotal size-temperature (ST) relation does not evolve with redshift.

We explore a similar ST relation for Sunyaev-Zel'dovhich Effect (SZE) data, the isodecrement size-temperature relation. The slope of the SZE ST relation is expected to be much steeper than its X-ray counterpart. However, with the standard models for the redshift evolution of clusters and a simple cluster model, the SZE ST relation is not expected to evolve with redshift. We discuss the current state of the SZE ST relation and the requirements neccesary to determine cosmological parameters.

EDR acknowledges support from Chandra Fellowship grant PF1-20020, awarded through the Chandra Science Center, which is operated by the Smithsonian Astrophysical Observatory for NASA under under contract NAS8-39073. JJM acknowledges support from NASA LTSA award NAG5-11415. JEC acknowledges support from NASA LTSA grant NAG5-7986.

[Previous] | [Session 5] | [Next]

Bulletin of the American Astronomical Society, 34, #4
© 2002. The American Astronomical Soceity.