Mathematics – Logic
Scientific paper
May 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...221..745l&link_type=abstract
Astrophysical Journal, Part 1, vol. 221, May 1, 1978, p. 745-755.
Mathematics
Logic
23
Galactic Clusters, Luminous Intensity, X Ray Sources, Astronomical Catalogs, Galactic Radiation, Latitude Measurement, Red Shift
Scientific paper
A complete optical survey has been made of 31 unidentified high-galactic-latitude (at least 10 deg in absolute value) X-ray sources from the Uhuru and MX catalogs south of declination -27 deg. Thirteen clusters of galaxies (Abell distance classes not exceeding) are proposed as optical identifications. Using all presently available data, the distribution according to Rood and Sastry (1971) morphological type of X-ray clusters is found to be consistent with that of the overall Abell population. Both cD-B and L-C-F-I clusters are observed in the same X-ray luminosity range above 10 to the 44th power ergs/s. The absence of cD-B X-ray clusters below 4 by 10 to the 43rd power ergs/s is found to be independent of a possible cutoff in their X-ray luminosity function. X-ray luminosity and velocity dispersion are found to be correlated for both one-cluster and two-cluster interpretations of the redshift data for A2255 and A2319.
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