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| Paper: |
Time-Series of Linear Spectropolarimetric Observations of Wolf-Rayet Stars: Results for WR 134 |
| Volume: |
465, Four Decades of Massive Star Research - A Scientific Meeting in Honor of Anthony J. Moffat |
| Page: |
86 |
| Authors: |
St-Louis, N.; de la Chevrotière, A.; Moffat, A. F. J. |
| Abstract: |
We present results from a timeseries of spectropolarimetric observations of the Wolf-Rayet (WR) star WR 134. Our most striking observation so far is that in addition to the depolarization of spectral lines with respect to the continuum, already known to occur for this star, we find excess line polarisation in the red and blue wings at wavelengths clearly in excess of the terminal velocity of the wind. Also, contrary to expectations, we find no line depolarisation for the flat-topped He I λ5876 and C IV λ5804 lines. The excess polarization of the red wing is very likely a consequence of the well known red-shifted electron-scattering wing formed in expanding atmospheres, but the origin of the blue wing polarization still remains to be identified. |
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