Article (Scientific journals)
B fields in OB stars (BOB): Concluding the FORS 2 observing campaign
Schöller, M.; Hubrig, S.; Fossati, L. et al.
2017In Astronomy and Astrophysics, 599, p. 66
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Keywords :
Polarization; Stars: early-type; Stars: magnetic field; Stars: massive; Magnetic fields; Magnetism; Pipelines; B-fields; In-depth study; Low resolution; Massive stars; X-ray properties; Stars
Abstract :
[en] Aims. The B fields in OB stars (BOB) Collaboration is based on an ESO Large Programme to study the occurrence rate, properties, and ultimately the origin of magnetic fields in massive stars. Methods. In the framework of this program, we carried out low-resolution spectropolarimetric observations of a large sample of massive stars using FORS 2 installed at the ESO VLT 8 m telescope. Results. We determined the magnetic field values with two completely independent reduction and analysis pipelines. Our in-depth study of the magnetic field measurements shows that differences between our two pipelines are usually well within 3σ errors. From the 32 observations of 28 OB stars, we were able to monitor the magnetic fields in CPD -57° 3509 and HD 164492C, confirm the magnetic field in HD 54879, and detect a magnetic field in CPD -62° 2124. We obtain a magnetic field detection rate of 6 ± 3% for the full sample of 69 OB stars observed with FORS 2 within the BOB program. For the preselected objects with a v sin i below 60 km s-1, we obtain a magnetic field detection rate of 5 ± 5%. We also discuss X-ray properties and multiplicity of the objects in our FORS 2 sample with respect to the magnetic field detections. © ESO, 2017.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Schöller, M.;  European Southern Observatory, Karl-Schwarzschild-Str. 2, Garching, Germany
Hubrig, S.;  Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, Potsdam, Germany
Fossati, L.;  Österreichische Akademie der Wissenschaften, Institut für Weltraumforschung, Schmiedlstraße 6, Graz, Austria, Argelander-Institut für Astronomie der Universität Bonn, Auf dem Hügel 71, Bonn, Germany
Carroll, T. A.;  Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, Potsdam, Germany
Briquet, Maryline ;  Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, Potsdam, Germany, Space Sciences, Technologies and Astrophysics Research (STAR) Institute, Université de Liège, Quartier Agora, Allée du 6 Août 19c, Bât. B5C, Liège, Belgium
Oskinova, L. M.;  Universität Potsdam, Institut für Physik und Astronomie, Karl-Liebknecht-Str. 24/25, Potsdam, Germany
Järvinen, S.;  Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, Potsdam, Germany
Ilyin, I.;  Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, Potsdam, Germany
Castro, N.;  Argelander-Institut für Astronomie der Universität Bonn, Auf dem Hügel 71, Bonn, Germany, Department of Astronomy, University of Michigan, 1085 S. University Avenue, Ann Arbor, MI, United States
Morel, Thierry  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie
Langer, N.;  Argelander-Institut für Astronomie der Universität Bonn, Auf dem Hügel 71, Bonn, Germany
Przybilla, N.;  Institut für Astro- und Teilchenphysik, Universität Innsbruck, Technikerstr. 25/8, Innsbruck, Austria
Nieva, M.-F.;  Institut für Astro- und Teilchenphysik, Universität Innsbruck, Technikerstr. 25/8, Innsbruck, Austria
Kholtygin, A. F.;  St. Petersburg State University, Universitetski pr. 28, St. Petersburg, Russian Federation
Sana, H.;  Institute of Astrophysics, KU Leuven, Celestijnlaan 200D, Leuven, Belgium
Herrero, A.;  Instituto de Astrofísica de Canarias, C/vía Láctea s/n, La Laguna, Spain, Universidad de la Laguna, Departamento de Astrofísica, Avda. Francisco Sanchez 2, La Laguna, Spain
Barbá, R. H.;  Departamento de Física y Astronomía, Universidad de la Serena, Av. Juan Cisternas, Norte, La Serena, Chile
De Koter, A.;  Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, GE Amsterdam, Netherlands
More authors (8 more) Less
Language :
English
Title :
B fields in OB stars (BOB): Concluding the FORS 2 observing campaign
Publication date :
2017
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences
Volume :
599
Pages :
A66
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
Belspo for contract PRODEX Gaia-DPAC; Meitner Fellowship under project number N-1868-NBL
Funders :
AvH - Alexander von Humboldt-Stiftung [DE]
RFBR - Russian Foundation for Basic Research [RU]
BELSPO - Politique scientifique fédérale [BE]
FWF - Austrian Science Fund [AT]
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