Reference : How unique is Plaskett's star? A search for organized magnetic fields in short period...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/211734
How unique is Plaskett's star? A search for organized magnetic fields in short period, interacting or post-interaction massive binary systems★
English
Nazé, Yaël mailto [Université de Liège > > Groupe d'astrophysique des hautes énergies (GAPHE) >]
Neiner, Coralie [LESIA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, F-92195 Meudon, France]
Grunhut, Jason [European Southern Observatory (ESO), Karl Schwarzschild Strasse, D-85748 Garching bei München, Germany; Dunlap Institute for Astronomy and Astrophysics, University of Toronto, Rm 101, 50 St. George Street, Toronto, ON M5S 3H4, Canada]
Bagnulo, Stefano [Armagh Observatory and Planetarium, College Hill, Armagh BT61 9DG, UK]
Alecian, Evelyne [Université Grenoble Alpes, IPAG, CNRS, F-38000 Grenoble, France]
Rauw, Grégor mailto [Université de Liège > > Groupe d'astrophysique des hautes énergies (GAPHE) >]
Wade, Gregg A. [Department of Physics, Royal Military College of Canada, PO Box 17000, Station Forces, Kingston, ON, K7K 4B4, Canada]
BinaMIcS Collaboration [Department of Physics, Royal Military College of Canada, PO Box 17000, Station Forces, Kingston, ON, K7K 4B4, Canada)]
1-May-2017
Monthly Notices of the Royal Astronomical Society
Blackwell Publishing
467
501-511
Yes (verified by ORBi)
International
0035-8711
1365-2966
Oxford
United Kingdom
[en] stars: early-type ; stars: magnetic field ; stars: individual: Plaskett's star ; HD1337 ; HD25638 ; HD35652 ; HD35921 ; HD57060 ; HD100213 ; HD106871 ; HD115071 ; HD149404 ; HD152248 ; HD190967 ; HD209481 ; HD228854 ; LSS3074 ; XZ Cep
[en] Amongst O-type stars with detected magnetic fields, the fast rotator in the close binary called Plaskett's star shows a variety of unusual properties. Since strong binary interactions are believed to have occurred in this system, one may wonder about their potential role in generating magnetic fields. Stokes V spectra collected with the low-resolution FORS2 and high-resolution ESPaDOnS and Narval spectropolarimeters were therefore used to search for magnetic fields in 15 interacting or post-interaction massive binaries. No magnetic field was detected in any of them, with 0 G always being within 2σ of the derived values. For 17 out of 25 stars in the systems observed at high resolution, the 90 per cent upper limit on the individual dipolar fields is below the dipolar field strength of Plaskett's secondary; a similar result is found for five out of six systems observed at low resolution. If our sample is considered to form a group of stars sharing similar magnetic properties, a global statistical analysis results in a stringent upper limit of ∼200 G on the dipolar field strength. Moreover, the magnetic incidence rate in the full sample of interacting or post-interaction systems (our targets + Plaskett's star) is compatible with that measured from large surveys, showing that they are not significantly different from the general O-star population. These results suggest that binary interactions play no systematic role in the magnetism of such massive systems.
Space sciences, Technologies and Astrophysics Research - STAR
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/211734
10.1093/mnras/stx194
http://adsabs.harvard.edu/abs/2017MNRAS.467..501N

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