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Effect of a Dipole Magnetic Field on Stellar Mass-Loss

Published online by Cambridge University Press:  28 July 2017

Chris Bard  and
Richard Townsend
Chris Bard
Affiliation:
NPP Fellow, NASA Goddard Space Flight Center 8800 Greenbelt Rd., Greenbelt, MD, USA email: [email protected]
Richard Townsend
Affiliation:
Dept. of Astronomy, University of Wisconsin-Madison, 475 N. Charter St., Madison, WI, USA email: [email protected]
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Abstract

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Massive star winds greatly influence the evolution of both their host star and local environment though their mass-loss rates, but current radiative line-driven wind models do not incorporate any magnetic effects. Recent surveys of O and B stars have found that about ten percent have large-scale, organized magnetic fields. These massive-star magnetic fields, which are thousands of times stronger than the Sun’s, affect the inherent properties of their own winds by changing the mass-loss rate. To quantify this, we present a simple surface mass-flux scaling over the stellar surface which can be easily integrated to get an estimate of the mass-loss rate for a magnetic massive star. The overall mass-loss rate is found to decrease by factors of 2-5 relative to the non-magnetic CAK mass-loss rate.

Keywords

stars: magnetic fieldsstars: winds, outflowsstars: mass-lossstars: early-type
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S329: The Lives and Death-Throes of Massive Stars , November 2016 , pp. 242 - 245
Copyright
Copyright © International Astronomical Union 2017 

References

Bard, C. 2016, PhD. Thesis, University of Wisconsin-MadisonGoogle Scholar
Bard, C. & Townsend, R., 2016, MNRAS, 462, 3672 Google Scholar
Castor, J. I. and Abbott, D. C. and Klein, R. I., 1975, ApJ, 195, 157 Google Scholar
Friend, D. B. and Abbott, D. C., 1986, ApJ, 311, 701 Google Scholar
Morel, T. and Castro, N. and Fossati, L., et al. 2015, IAU Symposium, 307, 342 Google Scholar
Pauldrach, A. and Puls, J. and Kudritzki, R. P., 1986, A&A, 164, 86 Google Scholar
Owocki, S. P. and Castor, J. I. and Rybicki, G. B., 1988, ApJ, 335, 914 Google Scholar
ud-Doula, A. and Owocki, S. P., 2002, ApJ, 576, 413 Google Scholar
Wade, G. A. and Grunhut, J. and Alecian, E., et al. 2014, IAU Symposium, 302, 265 Google Scholar