Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-08-19
Astronomy and Astrophysics
Astrophysics
submitted to the ApJ; 20 pages
Scientific paper
We present a spectroscopic deprojection analysis of a sample of ten relaxed galaxy clusters. We use an empirical F-test derived from a set of Markov Chain Monte Carlo simulations to determine if the core plasma in each cluster could contain multiple phases. We derive non-parametric baryon density and temperature profiles, and use these to construct total gravitating mass profiles. We compare these profiles with the standard halo parameterizations. We find central density slopes roughly consistent with the predictions of LCDM: $-1 \lesssim d\log(\rho)/d\log(r) \lesssim -2$. We constrain the core size of each cluster and, using the results of cosmological simulations as a calibrator, place an upper limit of ~0.1 cm^2/g = 0.2 b(GeV/c^2)^{-1} (99% confidence) on the dark matter particle self-interaction cross section.
Arabadjis John S.
Bautz Mark W.
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