A statistical analysis of the Einstein normal galaxy sample. III - Radio and X-ray properties of elliptical and S0 galaxies

Details A statistical analysis of the Einstein normal galaxy sample. III - Radio and X-ray properties of elliptical and S0 galaxies A statistical analysis of the Einstein normal galaxy sample. III - Radio and X-ray properties of elliptical and S0 galaxies

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...312..111f&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 312, Jan. 1, 1987, p. 111-121.

Astronomy and Astrophysics

Astronomy

33

Elliptical Galaxies, Galactic Structure, Radio Sources (Astronomy), Seyfert Galaxies, X Ray Sources, Galactic Clusters, Galactic Nuclei, Heao 2, Interstellar Matter, Luminosity, Radio Spectra

Scientific paper

A sample of 20 elliptical and S0 galaxies has been observed at 4.75 GHz using the Effelsberg 100 m telescope. These galaxies are part of a sample of 29 early-type galaxies observed in the X-rays with the Einstein Observatory which was the object of a previous statistical analysis.The authors performed a statistical analysis of the radio, X-ray, and optical properties of the sample. They find that the radio luminosity of radio-quiet elliptical and S0 galaxies is correlated with their X-ray luminosity, but not with their blue luminosity. These results agree with the picture of radio nuclear sources in early-type galaxies being accreting compact objects. The fuel could be provided by the radiatively cooling X-ray emitting gas present in these galaxies, thus explaining the correlation of radio and X-ray luminosities.

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