Is the Wind of the Galactic Oe Star HD 155806 Magnetically Confined?

Details Is the Wind of the Galactic Oe Star HD 155806 Magnetically Confined? Is the Wind of the Galactic Oe Star HD 155806 Magnetically Confined?

2010-10-11

arxiv.org/abs/1010.2224v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

2 pages, 1 figure; to appear in the proceedings of IAU Symposium 272

Scientific paper

Spectropolarimetric observations of HD 155806 - the hottest Galactic Oe star - were obtained with CFHT/ESPaDOnS to test the hypothesis that disk signatures in its spectrum are due to magnetic channeling and confinement of its stellar wind. We did not detect a dipole field of sufficient strength to confine the wind, and could not confirm previous reports of a magnetic detection. It appears that stellar magnetism is not responsible for producing the disk of HD 155806.

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