Other
Scientific paper
Mar 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982phdt.........4r&link_type=abstract
Ph.D. Thesis California Univ., Berkeley.
Other
3
Classifications, Emission Spectra, Galaxies, Optical Properties, Quasars, X Rays, Active Galactic Nuclei, Active Galaxies, Correlation, Luminosity, Red Shift, Spectrum Analysis
Scientific paper
This work deals with the two major known classes of extragalactic X-ray emitters: clusters of galaxies, and active galactic nuclei. HEAO 1 A-2 LED spectra of eight clusters of galaxies--the Virgo, Perseus, Coma, and Centaurus clusters, Abell 2147, SC 1329-314, Abell 2319, and Abell 133-- are presented. L shell iron lines at 1.1 keV were observed in the spectrum of the Virgo cluster, indicating the presence of approximately cosmic abundances of heavy elements in this cluster. Spectral analysis indicates that at least two spectral components are required to describe the emission from the Centaurus cluster, Abell 2147, and SC 2139-314. The spectra of the other five clusters are adequately represented by isothermal models. The X-ray and optical properties of the eight clusters are discussed in the light of the evolutionary classification scheme proposed by Forman and Jones (1982). New optical identifications of forty-three objects from a sample of 145 serendipitous Einstein X-ray sources are presented. Twenty-eight are identified with active galaxies and quasars.
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