Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a...103...94w&link_type=abstract
Astronomy and Astrophysics, vol. 103, no. 1, Nov. 1981, p. 94-102. Deutsche Forschungsgemeinschaft
Astronomy and Astrophysics
Astrophysics
64
Iue, Magellanic Clouds, Stellar Mass Ejection, Stellar Spectrophotometry, Variable Stars, Luminous Intensity, Minima, Stellar Envelopes, Stellar Luminosity, Stellar Temperature, Ultraviolet Spectra, Velocity Distribution
Scientific paper
Using the IUE satellite, high resolution UV spectrograms are obtained of the S Dor type variable R 71 in the LMC. The IUE observations are supplemented by coordinated ground-based high dispersion spectroscopy and photometric observations. For the expanding envelope, a surprisingly low temperature of only about 6000 K and an apparently decelerated velocity field with a maximum outflow velocity of approximately 127 km/sec are found. The minimum state mass loss rate is of the order of 3 x 10 to the -7 solar mass/year. The results support the suggestion that the visual light variations of the S Dor type variables are produced by strong density variations of the expanding envelopes of these objects.
Appenzeller Immo
Stahl Otmar
Wolf Bernd
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