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 2015
Journal Proceedings of the International Astronomical Union
Event New windows on massive stars: asteroseismology, interferometry, and spectropolarimetry
Volume | Issue number 9 | S307
Pages (from-to) 342-347
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 Article
Note In Volume 9, S307 (June 2014) © 2015. - Part of Symposium: New windows on massive stars: asteroseismology, interferometry, and spectropolarimetry.
Language English
Published at
https://doi.org/10.1017/S1743921314007054 (Final published version)
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