1. A DeepChandraObservation of the Distant Galaxy Cluster MS 1137.5+6625
- Author
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John E. Carlstrom, Laurence P. David, Leon P. Van Speybroeck, Erik D. Reese, Laura Grego, William R. Forman, Jan M. Vrtilek, and Marshall Joy
- Subjects
Physics ,Astrophysics::High Energy Astrophysical Phenomena ,Conjunction (astronomy) ,Astrophysics (astro-ph) ,Angular diameter distance ,Astrophysics::Instrumentation and Methods for Astrophysics ,FOS: Physical sciences ,Astronomy and Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,Redshift ,symbols.namesake ,Optical imaging ,Space and Planetary Science ,Cluster (physics) ,symbols ,Galaxy cluster ,Hubble's law - Abstract
We present results from a deep Chandra observation of MS1137.5+66, a distant (z=0.783) and massive cluster of galaxies. Only a few similarly massive clusters are currently known at such high redshifts; accordingly, this observation provides much-needed information on the dynamical state of these rare systems. The cluster appears both regular and symmetric in the X-ray image. However, our analysis of the spectral and spatial X-ray data in conjunction with interferometric Sunyaev-Zel'dovich effect data and published deep optical imaging suggests the cluster has a fairly complex structure. The angular diameter distance we calculate from the Chandra and Sunyaev-Zel'dovich effect data assuming an isothermal, spherically symmetric cluster implies a low value for the Hubble constant for which we explore possible explanations., Comment: 16 pages, 6 figures, submitted to ApJ
- Published
- 2004
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