Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.254...30g&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 254, Jan. 1, 1992, p. 30-50.
Astronomy and Astrophysics
Astronomy
83
Active Galaxies, Astronomical Catalogs, Infrared Astronomy, Sky Surveys (Astronomy), X Ray Astronomy, Active Galactic Nuclei, Continuous Radiation, Infrared Sources (Astronomy), Quasars, Seyfert Galaxies, X Ray Sources
Scientific paper
Infrared and X-ray data from the IRAS and Einstein satellites have been compiled for a total of 269 quasars, Seyferts, emission-line and normal galaxies. It is found that galaxies with soft X-ray to infrared flux ratios greater than about 0.01 are almost certain to show broad-line optical emission. For the full IRAS/Einstein ensemble, a significant correlation between luminosities is found in the 60-micron and 0.5-4.5 keV bands. A strong offset separates broad line from normal and narrow-line galaxies. The jump toward higher X-ray emission in broad-line galaxies is interpreted as evidence for the increasing importance of a nonthermal nuclear source. The analysis of the empirical relationship between LX and L60 microns for normal and narrow optical emission-line galaxies makes it possible to convert 60-micron IRAS luminosity functions into estimates of the 2-keV X-ray luminosity function of IR-emitting galaxies.
Anderson Scott F.
Green Paul J.
Ward Martin J.
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