Hostname: page-component-7b7567c8c-7pwfn Total loading time: 0 Render date: 2026-11-15T09:24:42.035Z Has data issue: false hasContentIssue false
  • English
  • Français

Wind-wind collision effects in close massive WR+O binaries

Published online by Cambridge University Press:  07 August 2017

S.V. Marchenko
S.V. Marchenko*
Affiliation:
Département de Physique, Université de Montréal, C.P. 6128, Succ. A, Montréal, Québec, and Observatoire du mont Mégantic, Canada

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the 'Save PDF' action button.

A detailed description of the wind-wind collision (WWC) zones in the Wolf-Rayet binaries V444 Cyg (WN5+O6III-V, P = 4.21 d) and CX Cep (WN5+O5V, P = 2.13 d) is presented. In V444 Cyg, parameters of the WWC zone can be derived from variations of HeI line profiles. There is some evidence for a highly unstable character of the WWC zone. In CX Cep, the complicated dependence of equivalent widths for emission lines of different ionization potential on orbital phase can be explained by a combination of several factors, e.g., (a) additional ionization from the bow shock region; (b) reheating of the WR wind by the O-star companion; and (c) an emission component arising in the WWC region. Some preliminary indications of WWC are revealed in the WR+OB system CQ Cep (WN7+O9I-II?) with the shortest known orbital period: P = 1.64 d.

Information

Type
Session VII - Hydrodynamics and high-energy physics of colliding winds
Information
Symposium - International Astronomical Union , Volume 163: Wolf-Rayet Stars: Binaries, Colliding Winds, Evolution , 1995, pp. 397 - 405
Copyright
Copyright © Kluwer 1995 

References

Beals, C.S., 1944, MNRAS 104, 205 Google Scholar
Conti, P.S., Alschuler, W.R., 1971, ApJ 170, 325 Google Scholar
Conti, P.S., Underhill, A.B., 1988, O stars and Wolf-Rayet Stars, NASA SP-497 Google Scholar
Drissen, L., Moffat, A.F.J., Bastien, P., Lamontagne, R., Tapia, S. 1986, ApJ 306, 215 CrossRefGoogle Scholar
Eichler, D., Usov, V. 1993, ApJ 402, 271 CrossRefGoogle Scholar
Grandchamps, A., Moffat, A.F.J. 1991, in: van der Hucht, K.A. & Hidayat, B. (eds.), Wolf-Rayet Stars and Interrelations with Other Massive Stars in Galaxies, Proc. IAU Symp. No. 143 (Dordrecht: Kluwer), p. 258 Google Scholar
Guseinzade, A.A. 1969, Perem. Zvezdy (Variable Stars) 16, 500 Google Scholar
Kartasheva, T.A., Svechnikov, M.A. 1990, Bull. Sp. Astron. Obs. North Caucasus 28, 1 Google Scholar
Khaliullin, Kh.F., Khaliullina, A.I., Cherepashchuk, A.M. 1984, Sov. Astron. (Letters) 10, 250 Google Scholar
Koenigsberger, G., Auer, L.H. 1992, in: Drissen, L., Leitherer, C. & Nota, A. (eds.), Nonisotropic and Variable Outflows from Stars, ASP Conf. Series 22, 239 Google Scholar
Leitherer, C. 1988, ApJ 326, 356 Google Scholar
Leung, K-C., Moffat, A.F.J., Seggewiss, W. 1983, ApJ 265, 961 Google Scholar
Lewis, D., Moffat, A.F.J, Matthews, J.M., Robert, C., Marchenko, S.V. 1993, ApJ 405, 312 Google Scholar
Marchenko, S.V., Moffat, A.F.J., Koenigsberger, G. 1994a, ApJ 422, 810 Google Scholar
Marchenko, S.V. 1994b, in preparation Google Scholar
Prinja, R.K., Barlow, M.J., Howarth, I.D. 1990, ApJ 361, 607 Google Scholar
Niemela, V.S. 1980, in: Plavec, M.J., Popper, D.M. & Ulrich, R.K. (eds.), Close Binary Stars, Proc. IAU Symp. No. 88 (Dordrecht: Reidel), p. 177 Google Scholar
Sahade, J. 1958, Mem. Soc. Roy. Sci. Liège 20, 46 Google Scholar
Shore, S.N., Brown, D.N. 1988, ApJ 334, 1021 CrossRefGoogle Scholar
Shore, S.N., Corcoran, M.F. 1992, in: Kondo, Y., Sisteró, R.F. & Polidan, R.S. (eds.), Evolutionary Processes in Interacting Binary Stars, Proc. IAU Symp. No. 151 (Dordrecht: Kluwer), p. 359 Google Scholar
St-Louis, N., Moffat, A.F.J., Lapointe, L., Efimov, Yu.S., Shakhowskoy, N.M., Fox, G.K., Piirola, V. 1993, ApJ 410, 342 CrossRefGoogle Scholar
Stevens, I.R., Blondin, J.M., Pollock, A.M.T. 1992, ApJ 386, 265 CrossRefGoogle Scholar
Stickland, D.J., Bromage, G.E., Budding, E., Burton, W.M., Howarth, I.D., Jameson, R., Sherrington, M.R., Willis, A.J. 1984, A&A 134, 45 Google Scholar
Underhill, A.B., Gilroy, K.K., Hill, G.M. 1990, ApJ 351, 651 Google Scholar
van Kerkwijk, M.H., Charles, P.P., Geballe, T.R., King, D.L., Miley, G.K., Molher, L.A., van den Heuvel, E.P.J., van der Klis, M., van Paradijs, J. 1992, Nature 355, 703 Google Scholar
Walborn, N.R., Fitzpatrick, E.L. 1990, PASP 102, 379 Google Scholar
Wilson, O.C. 1940, ApJ 91, 379 Google Scholar