The properties of infrared galaxies in the local universe

Details The properties of infrared galaxies in the local universe The properties of infrared galaxies in the local universe

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....101..354s&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 101, Feb. 1991, p. 354-361. Research supported by NASA.

Astronomy and Astrophysics

Astronomy

182

Galaxies, Infrared Sources (Astronomy), Universe, Infrared Astronomy Satellite, Interstellar Matter, Luminosity

Scientific paper

The 60-micron selected IRAS Bright Galaxy Sample is used as a starting point to derive additional complete flux-limited samples of extragalactic objects at 12, 25, and 100 microns. With these complete samples the luminosity functions at all IRAS wavelengths are derived for the local universe. These luminosity functions are used to determine the infrared emission of the local universe. The maximum in the energy output of galaxies occurs at 100 microns. The infrared emission of galaxies at 12 and 25 micron represents about 30 percent of the total infrared luminosity in the local universe. The mean infrared colors of infrared selected galaxies vary systematically with infrared luminosity; the ratio Snu (60 microns)/Snu(100 microns) increases and Snu(12 microns)/Snu(25 microns) decreases with increasing infrared luminosity.

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