Other
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...394..139g&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 394, no. 1, July 20, 1992, p. 139-157.
Other
10
Galactic Nuclei, Star Distribution, Starburst Galaxies, Stellar Evolution, Abundance, Astronomical Spectroscopy, Metallicity, Solar Neighborhood, Stellar Atmospheres, Stellar Models, Supergiant Stars
Scientific paper
A 2.18-2.28 spectrum of the stellar nucleus of M82 at a low resolution (= 640) with high signal-to-noise ratio (greater than 100) is presented in order to examine the properties of the stars found in the central 50 pc of the starburst galaxy M82. It is concluded from a comparison of this spectrum to those of field giants and supergiants that the absorption features in the spectrum of M82 at 2.227 and 2.238 microns are significantly stronger relative to the 2.207- and 2.263-micron features. Potential explanations for this and other peculiarities in the stellar population of the nucleus are investigated using both observed and synthesized stellar spectra. Spectra of solar-neighborhood late-class stars demonstrate that the ratios of these strong absorption features remain constant over a large range in effective temperature and gravity.
Gaffney Niall I.
Lester Dan F.
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