Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...342...83s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 342, July 1, 1989, p. 83-99. Research supported by the University of Califo
Astronomy and Astrophysics
Astronomy
113
Active Galactic Nuclei, Infrared Sources (Astronomy), Seyfert Galaxies, Astronomical Catalogs, Color-Color Diagram, Far Infrared Radiation, Infrared Astronomy Satellite, Luminosity, Red Shift
Scientific paper
An all-sky 12 micron flux-limited sample of active galaxies was selected from the IRAS Point Source Catalog. Most of the sample galaxies are in existing catalogs, and 99 percent have measured redshifts. The 12-micron and the far-infrared luminosity functions of active and normal galaxies are derived using IRAS co-added data. A total of 22 percent of the sample galaxies harbor active nuclei. The sample consists almost equally of Seyfert 1, Seyfert 2, and LINER nuclei. The derived luminosity fuctions for Seyfert 1 and Seyfert 2 galaxies are indistinguishable from those of the optically selected CfA sample. Thus, 12 micron selection is the most efficient available technique for finding complete active galaxy samples.
Malkan Matthew A.
Spinoglio Luigi
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