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Wolf-Rayet Stellar Wind Theory

Published online by Cambridge University Press:  03 August 2017

J. P. Cassinelli
J. P. Cassinelli*
Affiliation:
Department of Astronomy University of Wisconsin-Madison 475 N. Charter Street Madison, WI 53706

Abstract

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Two possible solutions to the Wolf-Rayet wind momentum problem are discussed: purely radiation driven wind theory, with multi-line effects, and Luminous Magnetic Rotator theory. Several recently developed radiative processes for enhancing M or v∞ are described, and it is concluded that only the winds of rather hot luminous Wolf-Rayet stars could possibly be driven by radiation. These stars should show evidence of acceleration at large radial distances. For the rapid rotators, it is possible to drive a dense equatorial outflow. Limits are discussed regarding the needed surface magnetic fields. With this model, the wind momentum problem is solved in a piece-wise fashion by having the large radio flux of Wolf-Rayet stars come from the equatorial zone and the broad P Cygni lines, arising in the polar wind. The Luminous Magnetic Rotator model can also be tested through observation, primarily through spectropolarimetry.

Type
Session V. Mass Loss
Information
Symposium - International Astronomical Union , Volume 143: Wolf–Rayet Stars and Interrelations with other Massive Stars in Galaxies , 1991 , pp. 289 - 308
Copyright
Copyright © Kluwer 1991 

References

Abbott, D.C. (1982), Ap.J., 263, 723.CrossRefGoogle Scholar
Abbott, D.C. (1988), in proceedings of the 6th Solar Wind Conference NCAR TN 306, eds. Pizzo, V. C., Holzer, T. E., Sime, D. G. (NCAR), p. 149.Google Scholar
Abbott, D.C. and Conti, P.S. (1987), Ann. Rev. Ast. Astrophys., 25, 113.Google Scholar
Abbott, D.C. and Lucy, L.B. (1985), Ap. J., 288, 679.CrossRefGoogle Scholar
Barlow, M.J., Smith, L.J. and Willis, A.J. (1981), M.N.R.A.S., 196, 101.Google Scholar
Belcher, J.W. and MacGregor, K.B. (1976), Ap.J., 268, 498.Google Scholar
Cassinelli, J.P. (1982), in IAU Symp. 99. Wolf-Rayet Stars: Observations. Physics and Evolution, eds. de Loore, C.W.H. and Willis, A.J., (Dordrecht: Reidel), p. 173.Google Scholar
Cassinelli, J.P. (1990), to appear in Angular Momentum and Mass Loss from Hot Stars , eds. Willson, L.A. and Stalio, R., (Kluwer: Dordrecht).Google Scholar
Cassinelli, J.P. and Castor, J.I. (1973), Ap.J., 179, 189.CrossRefGoogle Scholar
Cassinelli, J.P., Schulte-Ladbeck, R.E., Poe, C.H., and Abbott, M. (1989), in IAU Colloq. 113. Phvsics of Luminous Blue Variables, eds. Davidson, K., Lamers, H.J.G.L.M., and Moffatt, A.F.J., (Kluwer: Dordrecht), p. 121.Google Scholar
Castor, J.I., Abbott, D.C., and Klein, R.I. (1975), Ap.J., 195, 157.CrossRefGoogle Scholar
Friend, D.B. and Abbott, D.C. (1986), Ap.J., 311, 701.Google Scholar
Friend, D.B. and Castor, J.I. (1983), Ap.J., 272, 259.Google Scholar
Friend, D.B., Poe, C.H., and Cassinelli, J.P. (1987), B. A. A. S., 20, 1012.Google Scholar
Goldberg, L. (1987), in The M Type Stars, NASA SP-492, eds. Johnson, H.R. and Querci, F.R., p. 245.Google Scholar
Hartmann, L. and Cassinelli, J.P. (1981), B. A. A. S., 13, 795.Google Scholar
Hartmann, L. and MacGregor, K.B. (1982), Ap. J., 259, 180.Google Scholar
Hillier, D.J. (1987), Ap.J. (Suppl.), 63, 965.CrossRefGoogle Scholar
Koenigsberger, G. (1990), these proceedings.Google Scholar
Langer, N. (1990), these proceedings.Google Scholar
Leer, E. and Holzer, T.E. (1980), J.Geophys. Res., 85, 4681.Google Scholar
Lucy, L.B. and Soloman, P.M. (1970), Ap.J., 159, 879.Google Scholar
Maeder, A. and Meynet, G. (1987), Astron. Astrophys., 182, 243.Google Scholar
Maeder, A. (1990), these proceedings.Google Scholar
Maheswaran, M. and Cassinelli, J.P. (1988), Ap.J., 335, 931.CrossRefGoogle Scholar
Panagia, N. and Macchetto, F. (1981), in IAU Colloq. 59. Effects of Mass Loss in Stellar Evolution, eds. Chiosi, C. and Stalio, R. (Dordrecht: Reidel), p. 173.CrossRefGoogle Scholar
Pauldrach, A., Puls, J., Hummer, D.G., and Kudritzki, R.P. (1985), Astron. Astrophys., 148, L1.Google Scholar
Pauldrach, A., Puls, J., Kudritzki, R.P. (1986), Astron. Astrophys., 164, 86.Google Scholar
Pauldrach, A., Kudritzki, R.P. Puls, J., and Butler, K. (1990), Astron. Astrophys., 228 125.Google Scholar
Poe, C.H., Friend, D.B., and Cassinelli, J.P. (1989), Ap.J., 337, 888.CrossRefGoogle Scholar
Prinja, R.K., Barlow, M.J., and Howarth, I.D. (1990), Ap. J., Puls, J. and Hummer, D.G. (1988), Astron. Astrophys., 191, 87.Google Scholar
Puls, J. (1987), Astron. Astrophys., 184, 227.Google Scholar
Schmidt, G.D. (1988), in Polarized Radiation of Circumstellar Origin, eds. Coyne, G.V. et al., (Vatican Observatory: Vatican), p. 641 Google Scholar
Schmutz, W., Harmann, W.-R., Wessolowski, U. (1989), Astron. Astrophys., 210, 236.Google Scholar
Schulte-Ladbeck, R.E. (1990), these proceedings. Weber, E.J., and Davis, L. Jr. (1967), Ap.J., 268, 228.Google Scholar
Zickgraf, F.J. and Schulte-Ladbeck, R.E. (1989), Astron. Astrophys., 214, 274.Google Scholar