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Variability of the Hα Emission in the Be Star o Andromedae

Published online by Cambridge University Press:  12 April 2016

E. Panko  and
A. Tarasov
E. Panko
Affiliation:
Nikolaev Pedagogical University, Nikolaev, 327030, Ukraine
A. Tarasov
Affiliation:
Crimean Astrophysical Observatory, Nauchny, Crimea, 334413, Ukraine

Abstract

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The parameters of the Hα line profile of the Be star o And were determined from observations carried out during the period 1985 - 1998. At this time the line has undergone significant changes – from a pure absorption photospheric profile with no sign of an envelope in 1985 to the transition into the shell phase with a very narrow and deep absorption component in 1989. During 1991 - 1998 the Hα emission remained at the level achieved in 1989. The line profile showed short-term changes. The envelope development in the time interval 1985 - 1998 does not confirm the previously found period of 8.5 years.

Type
6. Disks
Information
International Astronomical Union Colloquium , Volume 175: The Be Phenomenon in Early-Type Stars , 2000 , pp. 543 - 546
Copyright
Copyright © Astronomical Society of the Pacific 2000

References

Fracassini, M., Pasinetti, L.E. 1975, IBVS 1044.Google Scholar
Gulliver, A.F., Bolton, C.T., Poeckert, R. 1980, PASP 92, 774.Google Scholar
Hartkopf, W.I., Mason, B.D., McAlister, H.A. 1996, ApJ 111, 370 CrossRefGoogle Scholar
Harmanec, P. 1984, IBVS 2506Google Scholar
Harmanec, P., Hill, G.M., Walker, G.A.H., Dinshaw, N. et al. 1987, Publ. Astron. Inst. Czechosl. Acad. Sci. 70, 115.Google Scholar
Hill, G.M., Walker, G.A.H., Dinshaw, N., Yang, S., Harmanec, P. 1988, PASP 100, 243.Google Scholar
Hill, G.M., Walker, G.A.H., Yang, S., Harmanec, P. 1989, PASP 101, 258 Google Scholar
Koubský, P. 1984, IBVS 2584.Google Scholar
McAlister, H.A. 1979, ApJ 230, 497.Google Scholar
Pasinetti, L.E. 1968, Mem. Soc. Astron. Ital. 39, 73 Google Scholar
Schmidt, H. 1959, ZAp 48 249 Google Scholar