Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...120..287s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 120, no. 2, April 1983, p. 287-296. Sponsorship: Deutsche Forschungsgemeinscha
Astronomy and Astrophysics
Astrophysics
42
B Stars, Emission Spectra, Magellanic Clouds, Stellar Envelopes, Stellar Mass Ejection, Stellar Spectra, Supergiant Stars, Iue, Line Spectra, Radial Velocity, Spectral Energy Distribution, Ubv Spectra, Ultraviolet Spectra, Variable Stars, Velocity Distribution, Visible Spectrum
Scientific paper
The LMC's peculiar emission line star R 66 (Aeq) is studied by means of high dispersion spectroscopy and UBV and JHKLM photometry, from which a model is derived which consists of a massive, luminous B-type supergiant surrounded by a dense, cool expanding envelope and a circumstellar dust shell whose temperature is 1100 K at its inner edge. R 66 belongs to the massive post main sequence envelope objects characterized by drastic mass loss rates. Although it has not exhibited any variations, R 66 has many features in common with the S Dor variables during maximum phase. It is theorized that massive stars may spend 20 percent of their B supergiant evolutionary phase as drastic mass losers.
Bastian Ulrich
de Groot Mart J. H.
Leitherer Cl.
Stahl Otmar
Wolf Bernd
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