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J. A. Irwin, C. R. Mullis (European Southern Observatory), R. A. Dupke, J. N. Bregman (University of Michigan)
While nearly all hydrodynamical simulations of the hot gas contained within clusters of galaxies predict a rapid decline in the temperature of the hot gas outside of ~50% of the virial radius, observational evidence of this decline has been sparse, owing to low X-ray count rates at large radii. In this poster, we use multiple offset XMM-Newton observations to determine the temperature (and abundance) behavior of the cluster gas at large (~70% of the virial radius) radii within A1795, one of the brightest relaxed clusters in the local Universe. We will compare the observations to simulations and discuss the implications of our results.
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Bulletin of the American Astronomical Society, 36 #3
© 2004. The American Astronomical Soceity.