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IRAS observations of a small sample of blue irregular galaxiesIRAS satellite IR observations are presently used to investigate the properties of the dust in a small sample of irregular galaxies chosen to cover a wide range in levels of star formation activity. The irregulars are found to have comparatively normal IR properties; the only exception is NGC 1569, an irregular galaxy with intense global star formation which seems to have a larger dust fraction at temperatures whose energies peak at 25-60 microns, by comparison with other irregulars. DDO 47, the system with lowest star formation activity, has the lowest far-IR color temperature and highest ratio of IR to H-alpha flux; this is suggested to be due to the decreased importance of radiation from young stars in heating the dust.
Document ID
19860050106
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Hunter, D. A.
(Carnegie Institution of Washington, Washington, DC; Kitt Peak National Observatory, Tucson AZ, United States)
Gillett, F. C.
(Carnegie Institution of Washington Washington, DC, United States)
Gallagher, J. S., III
(Kitt Peak National Observatory Tucson, AZ, United States)
Rice, W. L.
(California Institute of Technology Jet Propulsion Laboratory, Pasadena, United States)
Low, F. J.
(Steward Observatory Tucson, AZ, United States)
Date Acquired
August 12, 2013
Publication Date
April 1, 1986
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 303
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
86A34844
Distribution Limits
Public
Copyright
Other

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