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Disks of Classical Be Stars

Published online by Cambridge University Press:  12 April 2016

Stanislav Štefl
Stanislav Štefl*
Affiliation:
Astronomical Institute, Academy of Sciences, CZ-25165 Ondřejov, Czech Republic

Abstract

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Observational methods used in investigation of circumstellar disks of Be stars significantly changed during the last decade. While mostly the studies of line profiles in the optical and near-IR region were used in the 70th and 80th, the present progress is done also thanks to interferometric and polarimetric observations. These techniques enable to determine the geometrical parameters of the circumstellar disks directly for the first time. They are flattened and axially symmetric. Their H α emission region extends typically up to several tens of stellar radii. Systematic long-term spectroscopic monitoring helped to define and partly interpret the line-profile variability of emission lines on different time-scales. Variations on a time-scale of hours may appear after the matter is ejected during the outburst. The V/R variations with periods of the order of 10 years reflect the global disk oscillations.

Type
Section I Observations of Non-spherical Winds
Information
International Astronomical Union Colloquium , Volume 169: Variable and Non-spherical Stellar Winds in Luminous Hot Stars , 1999 , pp. 24 - 31
Copyright
Copyright © Springer-Verlag 1999

References

Bjorkman, J.E., Cassinelli, J.P., 1993, ApJ 409, 429 CrossRefGoogle Scholar
Brown, J.C., McLean, I.S., 1977, A&A, 57, 141 Google Scholar
Coté, J., Waters, L.B.F.M., 1987, A&A 176, 93 Google Scholar
Dachs, J., 1986, in IAU Coll. 92, p. 149 Google Scholar
Dougherty, S.M., Taylor, A.R., 1992, Nature 359, 808 Google Scholar
Gehrz, R.D., Hackwell, J.A., Jones, T.W., 1974, ApJ 191, 675 CrossRefGoogle Scholar
Goraya, P.S., Tur, N.S., 1988, A&A 205, 164 Google Scholar
Gulliver, A.F., 1977, ApJS 35, 441 Google Scholar
Harmanec, P., 1988, Bull. Astron. Inst. Czechosl. 39, 329 Google Scholar
Hanuschik, R., 1986, A&A 166, 185 Google Scholar
Hanuschik, R.. 1996, A&A 308, 170 Google Scholar
Hanuschik, R., Kozok, J.R., Kaiser, D., 1988, A&A 189, 147 Google Scholar
Huang, S.S., 1973, ApJ 183, 541 CrossRefGoogle Scholar
Hubert-Delplace, A.M., Jaschek, M., Hubert, H., Chambon M.Th., 1981, in IAU Symp. 98, p. 125Google Scholar
Hummel, W., 1998, A&A 330, 243 Google Scholar
Hummel, W., Hanuschik, R., 1997, A&A 320, 852 Google Scholar
Jaschek, M., Hubert-Delplace, A.-M., Hubert, H., Jaschek, C., 1980, A&AS 42, 103 Google Scholar
Mennickent, R.E., Sterken, C., Vogt, N., 1997, A&A 326, 1167 Google Scholar
Okazaki, A.T., 1991, 1991, PASJ 42, 75 Google Scholar
Okazaki, A.T., 1997, A&A 318, 548 Google Scholar
Owocki, S., Cranmer, S.R., Blondin, J.M., 1994, ApJ 424, 887 Google Scholar
Papaloizou, J.C., Savonije, G.J., Henrichs, H.F., 1992, A&A 265, L45 Google Scholar
Perryman, M.A.C., Høg, E., Kovalewski, J., Lindegren, L., Turon, C., 1997, ESA SP-1200, The Hipparcos and Tycho CataloguesGoogle Scholar
Porter, J.M., 1998, A&A 336, 966 Google Scholar
Quirrenbach, A., Hummel, C.A., Buscher, D.F., Amstrong, J.T., Mozurkewich, D., Elias, N.M. II, 1993, ApJ 416, L25 Google Scholar
Quirrenbach, A., Bjorkman, K.S., Bjorkman, J.E., Hummel, C.A., Buscher, D.F., Armstrong, J.T., Mozurkewich, D., Elias, N.M. II, Babler, B.L., 1997, ApJ 479, 477 CrossRefGoogle Scholar
Rivinius, Th., Baade, D., Štefl, S., Stahl, O., Wolf, B., Kaufer, A.: 1998a, A&A, 333, 125 Google Scholar
Rivinius, Th., Baade, D., Štefl, S., Stahl, O., Wolf, B., Kaufer, A., 1998b, in Proc. A Half Century of Stellar Pulsation Interpretations: A Tribute to Arthur N. Cox, eds. Bradley, P.A. and Guzik, J.A., Astron. Soc. Pacifie Conf. Series, 135, 341 Google Scholar
Savonije, G.J., Heemskerk, M.H.M., 1993, A&A 276, 409 Google Scholar
Snow, T.P., 1981, ApJ 251, 139 Google Scholar
Štefl, S., Baade, D., Rivinius, Th., Kaufer, A., Stahl, O., Wolf, B.: 1998, in Proc. A Half Century of Stellar Pulsation Interpretations: A Tribute to Arthur N. Cox, eds. Bradley, P.A. and Guzik, J.A., Astron. Soc. Pacifie Conf. Series, 135, 348 Google Scholar
Telting, J.H., Kaper, L., 1994, A&A 284, 515 Google Scholar
Thorn, C., Granes, P., Vakili, F., 1986, A&A 165, L13 Google Scholar
Waters, L.B.F.M., Coté, J., Lamers, H.J.G.L.M., 1987, A&A 185, 206 Google Scholar