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Monte-Carlo simulations of linear polarization in clumpy OB-star winds

Published online by Cambridge University Press:  12 July 2011

Richard H. D. Townsend  and
Nick Mast
Richard H. D. Townsend
Affiliation:
Department of Astronomy, University of Wisconsin-Madison, Madison, WI 53706, USA
Nick Mast
Affiliation:
Department of Astronomy, University of Wisconsin-Madison, Madison, WI 53706, USA
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Abstract

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We present results from Monte-Carlo simulations of linear polarization in clumped OB-star winds. We find that previous single-scattering models of clumped winds have overestimated the degree of polarization, even in cases where individual clumps are optically thin. An application to P Cygni suggests the star's wind is more fragmented than previously thought.

Keywords

polarizationradiative transferscatteringmethods: numericaltechniques: polarimetricstars: mass lossstars: early-typestars: windsoutflowsstars: individual (P Cygni)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S272: Active OB stars: structure, evolution, mass loss, and critical limits , July 2010 , pp. 216 - 217
Copyright
Copyright © International Astronomical Union 2011

References

Cohen, D. H., Leutenegger, M. A., & Townsend, R. H. D. 2008, in: Hamann, W.-R., Feldmeier, A., & Oskinova, L. M. (eds.), Clumping in Hot-Star Winds, p. 209Google Scholar
Davies, B., Vink, J. S., & Oudmaijer, R. D. 2007, A&A, 469, 1045Google Scholar
Percy, J. R., Evans, T. D. K., Henry, G. W., & Mattei, J. A. 2001, in: de Groot, M. & Sterken, C. (eds.), P Cygni 2000: 400 Years of Progress, ASP-CS 233, p. 31Google Scholar