A Non-Parametric Approach to Modeling Clusters of Galaxies

Details A Non-Parametric Approach to Modeling Clusters of Galaxies A Non-Parametric Approach to Modeling Clusters of Galaxies

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004head....8.0212p&link_type=abstract

American Astronomical Society, HEAD meeting #8, #02.12; Bulletin of the American Astronomical Society, Vol. 36, p.905

Astronomy and Astrophysics

Astronomy

Scientific paper

We present a new method for analyzing X-ray data from clusters of galaxies. The method uses hundreds of X-ray emitting plasma "blobs". Each blob is assigned its own temperature, abundances, position, luminosity, and size. The X-ray data for this complex model is generated by Monte Carlo simulations for both XMM-Newton RGS and EPIC data. Iterations of blob parameters are performed using Markov chains and a complete set of statistical realizations that are consistent with the observations are obtained. We apply the method to RGS observations of Perseus and M87. This approach demonstrates in a model-independent context the failure of the cooling flow model and places detailed spatially-resolved emission measure constraints on cooling flow models. We also present EPIC results of Abell 1689 using this approach. We expect that these techniques will lead to an easier comparison of X-ray results with those of weak/strong lensing and SZ observations in future studies.

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