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Linear line spectropolarimetry as a new window to measure 2D and 3D wind geometries

Published online by Cambridge University Press:  23 January 2015

Jorick S. Vink
Jorick S. Vink*
Affiliation:
Armagh Observatory, College Hill, BT61 9DG Armagh, Northern Ireland email: [email protected]
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Abstract

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Various theories have been proposed to predict how mass loss depends on the stellar rotation rate, both in terms of its strength, as well as its latitudinal dependence, crucial for our understanding of angular momentum evolution. Here we discuss the tool of linear spectropolarimetry that can probe the difference between mass loss from the pole versus the equator. Our results involve several groups of O stars and Wolf-Rayet stars, involving Oe stars, Of?p stars, Onfp stars, as well as the best candidate gamma-ray burst progenitors identified to date.

Keywords

techniques: polarimetriccircumstellar matterstars: early-typestars: emission-lineBestars: mass lossstars: rotationstars: windsoutflowsstars: Wolf-Rayet
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Issue S307: New windows on massive stars: asteroseismology, interferometry, and spectropolarimetry , June 2014 , pp. 359 - 364
Copyright
Copyright © International Astronomical Union 2015 

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