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Magnetic fields of OB stars

Published online by Cambridge University Press:  07 August 2014

A. F. Kholtygin ,
S. Hubrig ,
N. A. Drake ,
N. Sudnik  and
V. Dushin
A. F. Kholtygin
Affiliation:
Saint Petersburg State University, Universitetski pr. 28, Petrodvorets, 198504, Saint Petersburg, Russia, email: afx-afx@mail.ru
S. Hubrig
Affiliation:
Leibniz-Institut für Astrophysik, Potsdam, Germany, email: shubrig@aip.de
N. A. Drake
Affiliation:
Saint Petersburg State University, Universitetski pr. 28, Petrodvorets, 198504, Saint Petersburg, Russia, email: afx-afx@mail.ru Observatório Nacional/MCTI, Rua General José Cristino 77, 20921-400, Rio de Janeiro, Brazil, email: drake@on.br
N. Sudnik
Affiliation:
Saint Petersburg State University, Universitetski pr. 28, Petrodvorets, 198504, Saint Petersburg, Russia, email: afx-afx@mail.ru
V. Dushin
Affiliation:
Saint Petersburg State University, Universitetski pr. 28, Petrodvorets, 198504, Saint Petersburg, Russia, email: afx-afx@mail.ru
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Abstract

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We studied the statistical properties of the magnetic fields of OB stars based on the recent measurements. As the statistically significant characteristic of the magnetic field we use the rms magnetic field of the star ${\cal B}$. The distribution functions f(${\cal B}$) of magnetic fields of OB stars are evaluated. The function f(${\cal B}$) has a power-law dependence on the ${\cal B}$ with an index of about 2-3 and a fast drop below ${\cal B}$ = 100 − 300 G. We proposed that the compact regions with strong local magnetic fields can contribute to the global magnetic field of O stars.

Keywords

stars: magnetic fields – stars: early-type – stars: spots
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S302: Magnetic Fields throughout Stellar Evolution , August 2013 , pp. 270 - 271
Copyright
Copyright © International Astronomical Union 2014 

References

Bychkov, V. D., Bychkova, L. V., & Madej, J. 2009, MNRAS, 394, 1338CrossRefGoogle Scholar
Henrichs, H. & Sudnik, N. P. 2013, in Massive Stars: From α to Ω, held 10-14 June 2013 in Rhodes, Greece, (http://a2omega-conference.net, id.71)Google Scholar
Hubrig, S., Schöller, M., Kharchenko, N. V.et al. 2011, A&A, 528, A151Google Scholar
Hubrig, S., Schöller, M., Ilyin, I.et al. 2013, A&A, 551, A33Google Scholar
Kholtygin, A. F., Fabrika, S. N., Drake, N. A.et al. 2010, Astron. Lett., 36, 370Google Scholar