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IUE observations of amorphous hot galaxiesBlue amorphous galaxies are star-forming, irregularlike systems which lack the spatially distinct OB stellar groups that are characteristic of most late-type galaxies. In order to better understand the nature of star-formation processes in these unusual galaxies, short-wavelength IUE spectra of the amorphous galaxies NGC 1705 and NGC 1800 have been obtained. It is found that NGC 1705 contains a normal mix of OB stars, which is consistent with the nearly constant recent star-formation rate inferred from new optical data. NGC 1800 is likely to have similar properties, and blue galaxies with amorphous structures thus do not show evidence for anomalies in stellar populations. The UV spectra of these galaxies and a variety of other hot extragalactic stellar systems in fact have similar characteristics, which suggests OB stellar populations are often homogeneous in their properties.
Document ID
19850049755
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Lamb, S. A.
(Illinois Univ. Urbana, IL, United States)
Hjellming, M. S.
(Illinois, University Urbana, IL, United States)
Gallagher, J. S., III
(Illinois, University Urbana, IL; Kitt Peak National Observatory, Tucson, AZ, United States)
Hunter, D. A.
(Kitt Peak National Observatory Tucson, AZ, United States)
Date Acquired
August 12, 2013
Publication Date
April 1, 1985
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 291
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
85A31906
Funding Number(s)
CONTRACT_GRANT: NAG5-362
Distribution Limits
Public
Copyright
Other

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