The B Fields in OB Stars (BOB) Survey

Authors
  • T. Morel
  • N. Castro
  • L. Fossati
  • S. Hubrig
  • N. Langer
  • N. Przybilla
  • M. Schöller
  • T. Carroll
  • I. Ilyin
  • A. Irrgang
  • L. Oskinova
  • F.R.N. Schneider
  • S. Simon Díaz
  • M. Briquet
  • J.F. González
  • N. Kharchenko
  • M.-F. Nieva
  • R.-D. Scholz
  • A. de Koter
  • W.-R. Hamann
  • A. Herrero
  • J. Maíz Apellániz
  • H. Sana
  • R. Arlt
  • R. Barbá
  • P. Dufton
  • A. Kholtygin
  • G. Mathys
  • A. Piskunov
  • A. Reisenegger
  • H. Spruit
  • S.-C. Yoon
Publication date 2014
Host editors
  • G. Meynet
  • C. Georgy
  • J. Groh
  • P. Stee
Book title New windows on massive stars, asteroseismology, interferometry and spectropolarimetry
Book subtitle proceedings of the 307th Symposium of the International Astronomical Union held in Geneva, Switzerland June 23-27, 2014
ISBN
  • 9781107078581
Series Proceedings of the International Astronomical Union, S307
Event New windows on massive stars: asteroseismology, interferometry, and spectropolarimetry
Pages (from-to) 342-347
Publisher Cambridge: Cambridge University Press
Organisations
  • Faculty of Science (FNWI) - Anton Pannekoek Institute for Astronomy (API)
Abstract
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.
Document type Conference contribution
Language English
Published at https://doi.org/10.1017/S1743921314007054
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