Wind asymmetries in massive stars |
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| Authors: | R E Schulte-Ladbeck G C Clayton C Leitherer L Drissen C Robert A Nota J WM Parker |
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| Institution: | (1) Department of Physics and Astronomy, University of Pittsburgh, USA;(2) Center for Astrophysics and Space Astronomy, University of Colorado, USA;(3) Space Telescope Science Institute, Baltimore, USA;(4) Goddard Space Flight Center, Greenbelt, USA |
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| Abstract: | We are in the process of surveying the linear polarization in luminous, early-type stars. We here report on new observations of the B e] stars S 18 and R 50, and of the Luminous Blue Variables HR Car, R 143, and HD 160529. Together with previously published data, these observations provide clear evidence for the presence of intrinsic polarization in 1 Be] star (HD 34664) and in 5 LBVs ( Car, P Cyg, R 127, AG Car, and HR Car). The data indicate that anisotropic stellar winds are a common occurrence among massive stars in these particular evolutionary stages. For such stars, mass-loss rates estimated using the assumption of a spherical, homogeneous and stationary outflow may be in error. |
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| Keywords: | Luminous Blue Variables B [e] stars polarization |
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