| |
 |
| Paper: |
Circular Polarization of the Wolf-Rayet Star EZ CMa |
| Volume: |
465, Four Decades of Massive Star Research - A Scientific Meeting in Honor of Anthony J. Moffat |
| Page: |
92 |
| Authors: |
de la Chevrotière, A.; St-Louis, N.; Moffat, A. F. J. |
| Abstract: |
We report on the first direct search for a magnetic field via Zeeman
splitting in a Wolf-Rayet star. We observed at four
different rotation phases one of the best WR candidates,
expected to harbor a magnetic field, the bright, variable WN4 star
EZ CMa = WR 6 = HD 50896. As a consequence of a global, rotating
magnetic field, a characteristic circular polarization (Stokes
parameter V) pattern in strong emission lines should arise. In order
to increase the S/N, we binned the data and looked for such
diagnostic. Based on the work of Gayley & Ignace (2010), we investigate the
split-monopole scenario as a possible magnetic configuration and
obtain an upper limit of ∼ 300 G in the formation region of the
strongest emission line, He II λ4686. |
|
|
|
|
|
