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The B Fields in OB Stars (BOB) Survey
Morel, Thierry; Castro, N.; Fossati, L. et al.
2014In IAU Symposium
 

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Keywords :
Astrophysics - Solar and Stellar Astrophysics
Abstract :
[en] The B fields in OB stars (BOB) survey is an ESO large programme collecting spectropolarimetric observations for a large number of early-type stars in order to study the occurrence rate, properties, and ultimately the origin of magnetic fields in massive stars. As of July 2014, a total of 98 objects were observed over 20 nights with FORS2 and HARPSpol. Our preliminary results indicate that the fraction of magnetic OB stars with an organised, detectable field is low. This conclusion, now independently reached by two different surveys, has profound implications for any theoretical model attempting to explain the field formation in these objects. We discuss in this contribution some important issues addressed by our observations (e.g., the lower bound of the field strength) and the discovery of some remarkable objects.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Morel, Thierry  ;  Université de Liège - ULiège > Groupe d'astrophysique des hautes énergies (GAPHE)
Castro, N.
Fossati, L.
Hubrig, S.
Langer, N.
Przybilla, N.
Scholler, M.
Carroll, T.
Ilyin, I.
Irrgang, A.
Oskinova, L.
Schneider, F. R. N.
Diaz, S. Simon
Briquet, Maryline ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie
Gonzalez, J. F.
Kharchenko, N.
Nieva, M.-F.
Scholz, R.-D.
de Koter, A.
Hamann, W.-R.
Herrero, A.
Maiz Apellaniz, J.
Sana, H.
Arlt, R.
Barba, R.
Dufton, P.
Kholtygin, A.
Mathys, G.
Piskunov, A.
Reisenegger, A.
Spruit, H.
Yoon, S.-C.
More authors (22 more) Less
Language :
English
Title :
The B Fields in OB Stars (BOB) Survey
Publication date :
2014
Event name :
IAU Symposium 307: New Windows on Massive Stars: asteroseismology, interferometry and spectropolarimetry
Event date :
from 23-06-2014 to 27-06-2014
Audience :
International
Main work title :
IAU Symposium
Pages :
342
Commentary :
To appear in proceedings of IAU Symposium 307, New Windows on Massive Stars (Geneva, June 2014)
Available on ORBi :
since 27 November 2014

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