Other
Scientific paper
Apr 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...291...63l&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 291, April 1, 1985, p. 63-71.
Other
27
Galactic Structure, Hot Stars, Iue, Star Distribution, Stellar Evolution, Ultraviolet Spectra, Absorption Spectra, B Stars, Colorimetry, Interstellar Extinction, O Stars, Spectral Energy Distribution, Star Formation Rate, Stellar Mass
Scientific paper
Blue 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.
Gallagher John S. III
Hjellming Michael S.
Hunter Deidre Ann
Lamb Susan A.
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