Mathematics – Logic
Scientific paper
Dec 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...19710713r&link_type=abstract
American Astronomical Society, 197th AAS Meeting, #107.13; Bulletin of the American Astronomical Society, Vol. 32, p.1583
Mathematics
Logic
Scientific paper
We present Chandra X-ray Observatory data for several clusters of galaxies over a range of temperatures and redshifts. X-ray surface brightness profiles are produced for each cluster. Mass profiles are calculated for the inner 300 kpc of each cluster and compared with cold dark matter profiles from the literature. We find that the profile presented in Moore et. al. (1999) produces a reasonable fit to the cluster mass distributions while maintaining best fit parameters consistent with cosmological and structure formation constraints (e.g., the epoch of cluster formation). The Navarro, Frenk, and White (1996) profile is found to reproduce the behavior of observed cluster mass distributions but fails to maintain best fit parameters consistent with cosmological constraints. When normalized to the dark matter profile virial mass equivalent M200, the measured mass distributions are found to be self-similar. Each cluster is also compared with the King approximation to an isothermal sphere, and all are found to be highly inconsistent with a flat density core.
David Laurence P.
Robertson Brant E.
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