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Measurements of magnetic fields in Herbig Ae/Be stars and stars with debris disks at the VLT 8-m telescope: statistical results of our long-term program

Published online by Cambridge University Press:  12 July 2011

Ruslan V. Yudin ,
Swetlana Hubrig ,
Michail A. Pogodin ,
Markus Schoeller  and
Ilya Ilyin
Ruslan V. Yudin
Affiliation:
Central Astronomical Observatory of the Russian Academy of Sciences at Pulkovo, Saint-Petersburg, Russia, email: [email protected]
Swetlana Hubrig
Affiliation:
Astrophysical Institute Potsdam, Germany
Michail A. Pogodin
Affiliation:
Central Astronomical Observatory of the Russian Academy of Sciences at Pulkovo, Saint-Petersburg, Russia, email: [email protected]
Markus Schoeller
Affiliation:
European Southern Observatory, Garching, Germany
Ilya Ilyin
Affiliation:
Astrophysical Institute Potsdam, Germany
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Abstract

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We present the results of magnetic field measurements for a sample of 23 young Herbig Ae/Be (HAEBEs) stars and 12 stars with debris disks. The spectropolarimetric data were obtained during four observing runs in 2003-2008 at the European Southern Observatory with the multi-mode instrument FORS 1 installed at the 8 m Kueyen telescope. Among the 23 HAEBEs studied, stellar magnetic fields of about 100-150G have been detected in 11 stars (i.e. ~50%). The presence of circumstellar polarization signatures formed in the stellar wind supports the assumption that the magnetic centrifuge is one of the main mechanisms of the wind acceleration. No field detection at a significance level of 3σ was achieved in stars with debris disks.

Keywords

stars: magnetic fieldsstars: early-typestars: emission-line
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. 224 - 226
Copyright
Copyright © International Astronomical Union 2011

References

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