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Bp stars in Orion OB1 association

Published online by Cambridge University Press:  07 August 2014

Iosif I. Romanyuk  and
Ilya A. Yakunin
Iosif I. Romanyuk
Affiliation:
Special Astrophysical Observatory of Russian Academy of Sciences, 369167, Nizhny Arkhyz, Russia email: [email protected]
Ilya A. Yakunin
Affiliation:
Special Astrophysical Observatory of Russian Academy of Sciences, 369167, Nizhny Arkhyz, Russia email: [email protected]
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Abstract

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A total of 85 CP stars of various types are identified among 814 members of the Orion OB1 association. We selected 59 Bp stars, which account for 13.4% of the total number of B type stars in the association. The fraction of peculiar B type stars in the association is found to be twice higher than that of peculiar A type stars.

Magnetic field are found in 22 stars, 17 of them are objects with anomalous helium lines. No significant differences are found between the field strengths in the Bp type stars of the association and Bp type field stars. We identified 17 binaries, which make up 20% of the total number of peculiar stars studied which is the standard ratio for CP stars.

Keywords

stars:chemically peculiar-open clusters and associations:individual:Orion OB1
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S302: Magnetic Fields throughout Stellar Evolution , August 2013 , pp. 276 - 279
Copyright
Copyright © International Astronomical Union 2014 

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