Article (Scientific journals)
First HARPSpol discoveries of magnetic fields in massive stars
Alecian, E.; Kochukhov, O.; Neiner, C. et al.
2011In Astronomy and Astrophysics, 536, p. 6
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Keywords :
stars: massive; stars: magnetic field; stars: chemically peculiar; stars: individual: HD 122451; stars: individual: HD 105382; stars: individual: HD 130807
Abstract :
[en] In the framework of the Magnetism in Massive Stars (MiMeS) project, a HARPSpol Large Program at the 3.6m-ESO telescope has recently started to collect high-resolution spectropolarimetric data of a large number of Southern massive OB stars in the field of the Galaxy and in many young clusters and associations. We report on the first discoveries of magnetic fields in two massive stars with HARPSpol - HD 130807 and HD 122451, and confirm the presence of a magnetic field at the surface of HD 105382 that was previously observed with a low spectral resolution device. The longitudinal magnetic field measurements strongly vary for HD 130807 from ~-100 G to ~700 G. Those of HD 122451 and HD 105382 are less variable with values ranging from ~-40 to -80 G, and from ~-300 to -600 G, respectively. The discovery and confirmation of three new magnetic massive stars, including at least two He-weak stars, is an important contribution to one of MiMeS objectives: the understanding of the origin of magnetic fields in massive stars and their impact on stellar structure and evolution. Based on observations collected at the European Southern Observatory, Chile (Program ID 187.D-0917).
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Alecian, E.;  LESIA-Observatoire de Paris, CNRS, UPMC Univ., Univ. Paris-Diderot, 5 place Jules Janssen, 92195, Meudon Principal Cedex, France
Kochukhov, O.;  Department of Physics and Astronomy, Uppsala University, Box 516, 751 20, Uppsala, Sweden
Neiner, C.;  LESIA-Observatoire de Paris, CNRS, UPMC Univ., Univ. Paris-Diderot, 5 place Jules Janssen, 92195, Meudon Principal Cedex, France
Wade, G. A.;  Dept. of Physics, Royal Military College of Canada, PO Box 17000, Stn Forces, Kingston, K7K 7B4, Canada
de Batz, B.;  LESIA-Observatoire de Paris, CNRS, UPMC Univ., Univ. Paris-Diderot, 5 place Jules Janssen, 92195, Meudon Principal Cedex, France
Henrichs, H.;  Astronomical Institute Anton Pannekoek, University of Amsterdam, Science Park 904, 1098XH, Amsterdam, The Netherlands
Grunhut, J. H.;  Dept. of Physics, Royal Military College of Canada, PO Box 17000, Stn Forces, Kingston, K7K 7B4, Canada
Bouret, J*-C;  Laboratoire d'Astrophysique de Marseille, Traverse du Siphon, BP8-13376, Marseille Cedex 12, France
Briquet, Maryline ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie
Gagne, M.;  Department of Geology and Astronomy, West Chester University, West Chester, PA, 19383, USA
Nazé, Yaël  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique observationnelle (sol et espace)
Oksala, M. E.;  Department of Physics and Astronomy, University of Delaware, Newark, DE, 19716, USA
Rivinius, T.;  European Organisation for Astronomical Research in the Southern Hemisphere, Casilla 19001, Santiago 19, Chile
Townsend, R. H. D.;  Dept. of Astronomy, University of Wisconsin-Madison, 475 N. Charter Street, Madison, WI, 53706-1582, USA
Walborn, N. R.;  Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD, 21218, USA
Weiss, W.;  Institut für Astronomie, Universität Wien, Türkenschanzstrasse 17, 1180, Wien, Austria
Mimes, Collaboration
More authors (7 more) Less
Language :
English
Title :
First HARPSpol discoveries of magnetic fields in massive stars
Publication date :
01 December 2011
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences, Les Ulis, France
Volume :
536
Pages :
L6
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
http://de.arxiv.org/abs/1111.3433
Available on ORBi :
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