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Published February 1991 | Published
Journal Article Open

The properties of infrared galaxies in the local universe


The 60 µm 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 µm. 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 µm. The infrared emission of galaxies at 12 and 25 µm represents ~30% of the total infrared luminosity in the local Universe. The mean infrared colors of infrared selected galaxies vary systematically with infrared luminosity; the ratio S^v(60 µm)/S_v( 100 µm) increases and S_v(12 µm)/Sv(25 µm) decreases with increasing infrared luminosity.

Additional Information

© 1991 American Astronomical Society. Received 9 August 1990; revised 21 September 1990. We thank D. B. Sanders, J. L. Puget, and M. Malkan for useful discussions. This work was supported in part by the NASA Astrophysics Data Program, and in part by the NASA Long Term Space Astrophysics Research Program.

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Published - 1991AJ____101__354S.pdf


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