Astronomy and Astrophysics – Astronomy
Scientific paper
May 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...292..628b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 292, May 15, 1985, p. 628-639.
Astronomy and Astrophysics
Astronomy
39
Galactic Nuclei, Hydroxyl Emission, Infrared Stars, Masers, Radio Astronomy, Stellar Envelopes, Milky Way Galaxy, Radiant Flux Density, Silicates, Spectral Energy Distribution, Stellar Luminosity
Scientific paper
The authors have determined accurate radio positions and subsequently made simultaneous infrared and OH radio measurements of a sample of OH/IR stars near the tangential point and in the galactic center. Intrinsic physical parameters of the stars and their dust shells, as well as the maser luminosities, have been determined. They are consistent with the stars being at the top of the asymptotic giant branch; the dense circumstellar shells suggest that they are evolving rapidly through a phase of high mass loss. It is shown that the OH luminosity is strongly dependent on the degree of reddening of the circumstellar shell, i.e., on the stellar mass-loss rate. In addition, a quantitative relation between the OH luminosity and the optical depth in the 10 μm silicate feature has been determined.
Baud B.
Bentley Alan F.
Sargent Anneila I.
Werner Michael W.
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