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A 12μm Flux Limited Sample of Galaxies: Preliminary Results on the IR Luminosity Function

Published online by Cambridge University Press:  07 August 2017

L. Spinoglio  and
M. A. Malkan
L. Spinoglio
Affiliation:
Istituto di Fisica dello, Spazio Interplanetario, CP 27, 00044 Frascati, Italy
M. A. Malkan
Affiliation:
Department of Astronomy, University of California, Los Angeles, CA 90024-1562, U. S. A.

Abstract

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An all-sky 12μm flux-limited sample of 392 galaxies has been selected from the IRAS Point Source Catalog. More than 20% of the sample harbor active nuclei (with Seyfert 1 or 2 or LINER emission-line spectra). Thus one byproduct of this work is the definition of a large complete sample of bright active galaxies, with roughly equal percentages of Sy 1's, Sy 2's and LINERs. Since we now have virtually all (93%) the redshifts for the sample galaxies, the far-infrared luminosity functions of all classes of galaxies have been derived using IRAS coadded data. Since our luminosity functions for Sy 1 and Sy 2 are indistinguishable from those of the optically selected CfA sample, the 12μm selection appears to be an efficient and complete technique for finding active galactic nuclei. Optical spectrophotometry and near-IR photometry of the sample is being obtained to compute accurate bolometric luminosities.

Type
Part 1: Surveys, Luminosity Functions, and Evolution
Information
Symposium - International Astronomical Union , Volume 134: Active Galactic Nuclei , 1989 , pp. 55 - 56
Copyright
Copyright © Kluwer 1989