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Searching for magnetic fields in the descendants of massive OB stars

Published online by Cambridge University Press:  12 July 2011

Jason H. Grunhut ,
Gregg A. Wade ,
David A. Hanes  and
Evelyne Alecian
Jason H. Grunhut
Affiliation:
Kingston, Canada
Gregg A. Wade
Affiliation:
Kingston, Canada
David A. Hanes
Affiliation:
Kingston, Canada
Evelyne Alecian
Affiliation:
Grenoble, France
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Abstract

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We present the results of a recent survey of cool, late-type supergiants - the descendants of massive O- and B-type stars - that has systematically detected magnetic fields in these stars using spectropolarimetric observations obtained with ESPaDOnS at the Canada-France-Hawaii Telescope. Our observations reveal detectable, often complex, Stokes V Zeeman signatures in Least-Squares Deconvolved mean line profiles in a significant fraction of the observed sample of ~30 stars.

Keywords

instrumentation: polarimeterstechniques: spectroscopicstars: magnetic fieldsstars: supergiants
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S272: Active OB stars: structure, evolution, mass loss, and critical limits , July 2010 , pp. 186 - 187
Copyright
Copyright © International Astronomical Union 2011

References

Aurière, M., Konstantinova-Antova, R., Petit, P., Charbonnel, C. et al. 2008, A&A, 491, 499Google Scholar
Donati, J.-F., Semel, M., Carter, B. D., Rees, D. E. et al. 1997, MNRAS, 291, 658CrossRefGoogle Scholar
Grunhut, J. H., Wade, G. A., Hanes, D. A., & Alecian, E. 2010, MNRAS 408, 2290CrossRefGoogle Scholar