Is the wind of the Oe star HD 155806 magnetically confined?

Oe stars are a subset of the O-type stars that exhibit emission lines from a circumstellar disk. The recent detection of magnetic fields in some O-type stars suggests a possible explanation for the stability of disk-like structures around Oe stars. According to this hypothesis, the wind of the star...

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Bibliographic Details
Published in:Proceedings of the International Astronomical Union 2008-11, Vol.4 (S259), p.385-386
Main Authors: Petit, Véronique, Fullerton, A. W., Bagnulo, S., Wade, G. A.
Format: Article
Language:English
Subjects:
Accretion disks
Astronomy
Astrophysics
Contributed Papers
Magnetic fields
O stars
Stars & galaxies
Stellar magnetic fields
Structural stability
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Summary:Oe stars are a subset of the O-type stars that exhibit emission lines from a circumstellar disk. The recent detection of magnetic fields in some O-type stars suggests a possible explanation for the stability of disk-like structures around Oe stars. According to this hypothesis, the wind of the star is channeled by a dipolar magnetic field producing a disc in the magnetic equatorial plane. As a test of this model, we have obtained spectropolarimetric observations of the hottest Galactic Oe star HD 155806. Here we discuss its results and implications.
ISSN:1743-9213
1743-9221
DOI:10.1017/S1743921309030786