Ultraviolet observations of NGC 205

Low-resolution IUE observations of the dwarf elliptical galaxy NGC 205 show that the UV spectral energy distribution of the galaxy is relatively flat. Spectra centered on the nucleus and on a region north of the nucleus show evidence of recent 'bursts' of star formation which contribute st...

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Bibliographic Details
Published inThe Astrophysical journal Vol. 364; no. 1; pp. 87 - 93
Main Authors Wilcots, Eric M., Hodge, Paul, Eskridge, Paul B., Bertola, Francesco, Buson, Lucio
Format Journal Article
LanguageEnglish
Published Legacy CDMS University of Chicago Press 20.11.1990
Subjects
Astronomy
Astrophysics
Earth, ocean, space
Exact sciences and technology
Normal galaxies. Extragalactic objects and systems (by type)
Stellar systems. Galactic and extragalactic objects and systems. The universe
Model matching
Elliptical galaxies
Interstellar extinction
Dwarf galaxies
Stellar population
Energy distribution
Ultraviolet spectrum
Satellite observation
Extinction curve
Satellite galaxies
Spectroscopical observation
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Summary:Low-resolution IUE observations of the dwarf elliptical galaxy NGC 205 show that the UV spectral energy distribution of the galaxy is relatively flat. Spectra centered on the nucleus and on a region north of the nucleus show evidence of recent 'bursts' of star formation which contribute strongly to the UV spectral energy distribution. The UV spectra are fit with a composite spectrum based on a Miller-Scalo initial mass function, an underlying older population and an extinction based on a SMC-like extinction curve. This fit implies that the total mass of young stars in the galaxy is about 700,000 solar mass, which can be compared to the total mass of Population II stars in the galaxy of about 100 million solar mass.
Bibliography:CDMS
Legacy CDMS
ISSN:0004-637X
1538-4357
DOI:10.1086/169387