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Title:
The IRAS bright galaxy sample. II - The sample and luminosity function
Authors:
Soifer, B. T.; Sanders, D. B.; Madore, B. F.; Neugebauer, G.; Danielson, G. E.; Elias, J. H.; Lonsdale, Carol J.; Rice, W. L.
Affiliation:
AA(Palomar Observatory, Pasadena, CA), AB(Palomar Observatory, Pasadena, CA), AC(Palomar Observatory, Pasadena, CA), AD(Palomar Observatory, Pasadena, CA; David Dunlap Observatory, Richmond Hill, Canada), AE(Palomar Observatory; California Institute of Technology, Pasadena)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 320, Sept. 1, 1987, p. 238-257. NASA-NSF-NSERC-supported research. (ApJ Homepage)
Publication Date:
09/1987
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Cosmic Dust, Galactic Nuclei, Infrared Sources (Astronomy), Interstellar Gas, Seyfert Galaxies, Stellar Luminosity, Far Infrared Radiation, Galactic Evolution, Infrared Astronomy Satellite, Light (Visible Radiation), Morphology, Sky Surveys (Astronomy), Stellar Evolution
DOI:
10.1086/165536
Bibliographic Code:
1987ApJ...320..238S

Abstract

A statistically complete sample of 324 of the brightest infrared galaxies discovered at 60 microns in the IRAS all-sky survey is described. The results show that far-infrared emission is a significant luminosity component in the local universe, representing 25 percent of the luminosity emitted by stars in the same volume. Above 10 to the 11th solar luminosities, the infrared luminous galaxies are the dominant population of objects in the universe, being as numerous as the Seyfert galaxies and more numerous than quasars at higher luminosities. The infrared luminosity appears to be independent of the optical luminosity of galaxies. Most infrared bright galaxies appear to require much of the interstellar matter to be contributing to the observed infrared luminosity. Approximately 60-80 percent of the far-infrared luminosity of the local universe can be attributed, directly or indirectly, to recent or ongoing star formation.

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