Hostname: page-component-77c89778f8-gvh9x Total loading time: 0 Render date: 2024-07-21T21:12:18.707Z Has data issue: false hasContentIssue false
  • English
  • Français

Co-Rotating Interaction Regions in 2D Hot-Star Wind Models with Line-Driven Instability

Published online by Cambridge University Press:  12 April 2016

Stanley P. Owocki
Stanley P. Owocki*
Affiliation:
Bartol Research Institute of the University of Delaware, Newark, DE 19716, USA

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.

I review simulations of Co-rotating Interaction Regions (CIRs) in line-driven stellar winds. Previous CIR models have been based on a local, Sobolev treatment of the line-force, which effectively suppresses the strong, small-scale instability intrinsic to line-driving. Here I describe a new “3-ray-aligned-grid” method for computing the nonlocal, smooth-source-function line-force in 2D models that do include this line-driven instability. Preliminary results indicate that key overall features of large-scale CIRs can be quite similar in both Sobolev and non-Sobolev treatments, if the level of instability-generated wind structure is not too great. However, in certain models wherein the unstable self-excitation of wind variability penetrates back to the wind base, the stochastic, small-scale structure can become so dominant that it effectively disrupts any large-scale, CIR pattern.

Type
Session IV Theories of Wind Variations
Information
International Astronomical Union Colloquium , Volume 169: Variable and Non-spherical Stellar Winds in Luminous Hot Stars , 1999 , pp. 294 - 302
Copyright
Copyright © Springer-Verlag 1999

References

Castor, J.I., Abbott, D.C., & Klein, R.I. 1975, Ap. J, 195, 157 (CAK)CrossRefGoogle Scholar
Cranmer, S.R., & Owocki, S.P. 1996, ApJ, 462, 469 (C096)CrossRefGoogle Scholar
Feldmeier, A. 1998, Ap. J., in pressGoogle Scholar
Grinin, A., 1978, Sov. Astr. 14, 113 Google Scholar
Lucy, L.B. 1984, Ap. J. 284, 351 Google Scholar
Mullan, D.J. 1984a, Ap. J., 283, 303 CrossRefGoogle Scholar
Mullan, D.J. 1984b, Ap. J., 284, 769 CrossRefGoogle Scholar
Mullan, D.J. 1986, Astron. & Ap., 165, 157 Google Scholar
Owocki, S.P., 1991, Stellar Atmospheres: Beyond Classical Models, Crivellari, L., Hubeny, I., Hummer, D.G., eds. (Kluwer: Dordrecht), 235 CrossRefGoogle Scholar
Owocki, S.P. 1998, Cyclical Variability in Stellar Winds, Kaper, L. and Fullerton, A., eds., ESO Astrophysics Symposia Series, (Springer: Heidelberg), 325 Google Scholar
Owocki, S.P., Castor, J.I., & Rybicki, G.B., 1988, Ap. J. 335, 914 (OCR)CrossRefGoogle Scholar
Owocki, S.P., Cranmer, S.R., Gayley, K.G., 1998, in proceedings of Workshop on B[e] Stars , held in Paris, Prance, June, 1997, Hubert, A., ed., Kluwer, in pressGoogle Scholar
Owocki, S.P., & Puls, J. 1996, Ap. J. 462, 894 CrossRefGoogle Scholar
Owocki, S.P., & Puls, J. 1998, Ap. J, in pressGoogle Scholar
Owocki, S.P., & Rybicki, G.B. 1985, Ap. J., 199, 365 Google Scholar
Owocki, S.P., & Rybicki, G.B. 1986, Ap. J., 209, 127 CrossRefGoogle Scholar
Rybicki, G.B., Owocki, S.P., & Castor, J.I. 1990, Ap. J., 349, 274 CrossRefGoogle Scholar
Sobolev, V.V. 1960, Moving Envelopes of Stars (Cambridge: Harvard University Press)CrossRefGoogle Scholar