Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.281b.121d&link_type=abstract
In ESA, Proceedings of the Celebratory Symposium on a Decade of UV Astronomy with the IUE Satellite, Volume 2 p 121-124 (SEE N89
Astronomy and Astrophysics
Astronomy
B Stars, Iue, Spaceborne Astronomy, Stellar Activity, Stellar Mass Ejection, Ultraviolet Astronomy, Ultraviolet Spectra, Variability, Stellar Evolution, Stellar Models, Stellar Structure
Scientific paper
A study of the activity surrounding a 10 yr episode of increased mass-outflow for the Be star 59 Cyg identifies long-term patterns of coordinated variability, found in the visual and far UV. In the context of century-long visual studies of the similar long-term variability patterns of 59 Cyg and gamma Cas, two alternative interpretations of such observations as to the significance of Be stars for general stellar structure and evolution are possible: the variability suggests a nonthermal structure for the stellar interior, so that neither mass-loss or luminosity are time-constant; or Be stars do not exist in a long-lasting evolutionary stage, but represent a transition-phase between two such long-term evolutionary stages. The alternatives are not mutually exclusive.
Doazan Vera
Thomas Richard N.
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