A measurement of the mass fluctuation spectrum from the cluster X-ray temperature function

Details A measurement of the mass fluctuation spectrum from the cluster X-ray temperature function A measurement of the mass fluctuation spectrum from the cluster X-ray temperature function

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...372..410h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 372, May 10, 1991, p. 410-418.

Statistics

Computation

344

Galactic Clusters, Mass Distribution, Mass Spectra, Temperature Distribution, X Ray Astronomy, Computational Astrophysics, Many Body Problem, Power Spectra

Scientific paper

A statistically complete sample of galaxy clusters is presented which also has complete X-ray temperature information. Using this sample, the cluster bolometric luminosity and temperature functions are derived. The temperature function constrains the shape and amplitude of the mass fluctuation power spectrum. For a power law, i.e., with the fluctuation power spectrum proportional to k exp n, n = -(1.7 + 0.65, - 0.35), and an amplitude is obtained which implies that the rms value of delta-M/M is 0.59 + or - 0.02 on a scale of 8/h Mpc at the present epoch.

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