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Rapid Variations of Discrete Absorption Components in the spectrum of P Cygni

Published online by Cambridge University Press:  12 April 2016

G.L. Israelian
G.L. Israelian*
Affiliation:
Insituto de Astrofisica de Canarias, Canary Islands, Tenerife, Spain

Abstract

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The morphology and variability of spectral lines in the P Cygni high-resolution and high signal-to-noise near-UV spectra have been studied in detail over a period of few days. It is found that several Balmer lines have profiles with a complicated structure. All those lines which are well developed, but still not saturated, show two absorption components. A striking profile variability is discovered on a time-scale of from 1 to 3 days. The most dominant part of rapid variations is the drift of absorption components. It appears that there are two different kinds of components: long lived (with a characteristic time-scale of 200 days) and short-lived (time-scale of few days). The DAC phenomenon in the P Cygni stellar wind is a problems that still remains unsolved.

Type
1. Overview
Information
International Astronomical Union Colloquium , Volume 175: The Be Phenomenon in Early-Type Stars , 2000 , pp. 96 - 99
Copyright
Copyright © Astronomical Society of the Pacific 2000

References

Cassatella, A. et al. 1979, A&A 79, 223 Google Scholar
van Gent, R.H. and Lamers, H.J.G.L.M. 1986, A&A 158, 335 Google Scholar
de Groot, M.: 1969, Bull. Astr. Inst. Netherlands 20, 225 Google Scholar
Israelian, G., de Groot, M., Space Sci.Rev. 1999, 90, 493 Google Scholar
Israelian, G., de Groot, M., Parker, J.Wm. and Sterken, C. 1996, MNRAS 283, 119 Google Scholar
Kolka, I. 1983, Publ. Academy of Sci. Estonian SSR 32, 51 Google Scholar
Kolka, I. 1998, in Kaper, L. and Fullerton, A.W. (eds.), ESO Astrophys.Symp., Cyclical Variability of Stellar Winds, Springer, p.111 CrossRefGoogle Scholar
Lamers, H.J.G.L.M., Korevaar, P. and Cassatella, A. 1985, A&A 149, 29 Google Scholar
Luud, L.S., Golandski, O. and Iarigina, T. 1975, Publ. Tartu Astrophys. Obs. 53, 250 Google Scholar
Luud, L.S. and Sapar, A.: 1980, The UV spectrum of P Cug, Tartu Obs. preprint A-4Google Scholar
Markova, N. 1986a, Ap&SS 123, 5 Google Scholar
Markova, N. 1993a, A&A 273, 555 Google Scholar
Markova, N. 1993b, Ap&SS 201, 61 Google Scholar
Markova, N. and Kolka, I. 1984, Astrofizica 20, 465 Google Scholar
Markova, N. and Kolka, I. 1985, Astrofizica 23, 539 Google Scholar