Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998tx19.confe.539r&link_type=abstract
Abstracts of the 19th Texas Symposium on Relativistic Astrophysics and Cosmology, held in Paris, France, Dec. 14-18, 1998. Eds.:
Astronomy and Astrophysics
Astrophysics
Scientific paper
Distribution functions of internal parameters of galaxy clusters can place important constraints on cosmological scenarios. Especially the mass function can be used e. g. to constrain the amplitude of the initial density fluctuations. We compiled a complete X-ray flux-limited sample of the brightest clusters in the ROSAT All-Sky Survey, excluding the galactic band. We reanalysed the clusters using mainly high exposure pointed observations and determined internal parameters individually for each cluster in a homogeneous way. Shape parameters of the X-ray images and correlations of properties including the gas temperature were determined. The cluster gas mass and gravitational mass function were derived assuming hydrostatic equilibrium for the intra cluster gas.
Böhringer Hans
Reiprich Thomas H.
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