A limit to the X-ray luminosity of nearby normal galaxies

Details A limit to the X-ray luminosity of nearby normal galaxies A limit to the X-ray luminosity of nearby normal galaxies

Jul 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979stin...7931114w&link_type=abstract

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Astronomy and Astrophysics

Astronomy

Extraterrestrial Radiation, Galactic Clusters, Luminosity, Radio Galaxies, Seyfert Galaxies, X Ray Astronomy, X Ray Density Measurement, X Ray Sources, Background Radiation, Bremsstrahlung, Diffuse Radiation, Emissivity, Heao

Scientific paper

Emission is studied at luminosities lower than those for which individual discrete sources can be studied. It is shown that normal galaxies do not appear to provide the numerous low luminosity X-ray sources which could make up the 2-60 keV diffuse background. Indeed, upper limits suggest luminosities comparable with, or a little less than, that of the galaxy. This is consistent with the fact that the average optical luminosity of the sample galaxies within approximately 20 Mpc is slightly lower than that of the galaxy. An upper limit of approximately 1% of the diffuse background from such sources is derived.

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