An X-ray and optical study of the cluster of galaxies Abell 754

Details An X-ray and optical study of the cluster of galaxies Abell 754 An X-ray and optical study of the cluster of galaxies Abell 754

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...308..530f&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 308, Sept. 15, 1986, p. 530-539.

Astronomy and Astrophysics

Astrophysics

62

Astronomical Spectroscopy, Galactic Clusters, Visible Spectrum, X Ray Spectra, Brightness Distribution, Dark Matter, Red Shift, Spectrum Analysis, Surface Properties

Scientific paper

X-ray and optical data for A754 are used to study the relative distribution of the luminous and dark matter in this dense, rich cluster of galaxies with X-ray luminosity comparable to that of the Coma Cluster. A quantitative statistical comparison is made of the galaxy positions with the total mass responsible for maintaining the X-ray emitting gas in hydrostatic equilibrium. A simple bimodal model which fits both the X-ray and optical data suggests that the galaxies are distributed consistently with the projected matter distribution within the region covered by the X-ray map (0.5-1 Mpc). The X-ray and optical estimates of the mass in the central region of the cluster are 2.9 x 10 to the 14th and 3.6 + or - 0.5 x 10 to the 14th solar masses, respectively.

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