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IRAS observations of optically selected galaxies. I - The properties of the UGC redshift sampleThe FIR properties of more than 2400 optically selected galaxies in the Uppsala General Catalog are examined. The galaxies were detected by IRAS at 60 and 100 microns and have measured redshifts. A simple radiative transfer model is presented to study the nature of dust-heating sources. It is shown that for many normal disk galaxies, dust heated by old disk stars competes with dust heated by UV photons from newly formed stars. It is found that the 60-micron/100-micron flux density ratio may be used as an indicator of the dominant dust-heating source. Scaling relations with galaxy size and mass are presented which make it possible to estimate the contributions of any cirrus-like component to the total FIR luminosity.
Document ID
19890053991
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Bothun, Gregory D.
(Michigan, University Ann Arbor, United States)
Lonsdale, Carol J.
(Michigan Univ. Ann Arbor, MI, United States)
Rice, Walter
(California Institute of Technology Jet Propulsion Laboratory, Pasadena, United States)
Date Acquired
August 14, 2013
Publication Date
June 1, 1989
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 341
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
89A41362
Distribution Limits
Public
Copyright
Other

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