The radial distribution of morphological types of galaxies in X-ray clusters

Details The radial distribution of morphological types of galaxies in X-ray clusters The radial distribution of morphological types of galaxies in X-ray clusters

Jul 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...215..401m&link_type=abstract

Astrophysical Journal, Part 1, vol. 215, July 15, 1977, p. 401-407.

Mathematics

Logic

176

Galactic Clusters, Radial Distribution, Red Shift, Spiral Galaxies, X Ray Sources, Astronomical Spectroscopy, Morphological Indexes

Scientific paper

Galaxies have been classified in six clusters which are known to emit X-rays. It is found that in all cases the ratio of the surface density of spiral galaxies to that of S0's increases outward. Moreover, there is a correlation between the velocity dispersion of the galaxies in a cluster and the overall proportion of S0's among disk galaxies. These facts are interpreted as support for Gunn and Gott's (1972) hypothesis that S0's are produced from spirals by a process in which the interstellar gas in spirals is swept out as these galaxies move through the hot gas presumed to be responsible for the X-ray emission. A further test of this hypothesis is suggested, and redshift measurements are presented for galaxies in several X-ray clusters.

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