Joint Analysis of Chandra X-ray Observations and Sunyaev-Zeldovich
Effect Imaging to Determine the Distance to the Galaxy Cluster MS0451.6-0305
Jessica Gaskin(University of Alabama at Huntsville) Marshall Joy (Marshall Space Flight Center), John Carlstrom (University of Chicago), Megan Donahue (Space Telescope Science Institute), Sandeep Patel (Marshall Space Flight Center), Erik Reese (University of Chicago)
[Contributed talk, 15min.]
Results are presented for Chandra/ACIS-S and Owens Valley Radio Observatory (OVRO) Sunyaev-Zeldovich effect (SZE) observations of MS0451.6-0305. We use a maximum-likelihood joint fit spatial analysis of the X-ray and SZE datasets to determine the X-ray surface brightness, core radius, power law index , background level, SZE decrement, and their associated uncertainties. These quantities are combined with the Chandra-determined electron temperature to obtain an estimate for the angular diameter distance to the cluster, DA.
CATEGORY: CLUSTERS OF GALAXIES