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Studying the presence of magnetic fields in a sample of high-mass X-ray binaries

Published online by Cambridge University Press:  30 December 2019

Swetlana Hubrig ,
Alexander F. Kholtygin ,
Lara Sidoli ,
Markus Schöller  and
Silva P. Järvinen
Swetlana Hubrig
Affiliation:
Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, 14482 Potsdam, Germany email: shubrig@aip.de
Alexander F. Kholtygin
Affiliation:
Saint-Petersburg State University, Universitetskij pr. 28, 198504 Saint-Petersburg, Russia
Lara Sidoli
Affiliation:
INAF, Istituto di Astrofisica Spaziale e Fisica Cosmica, Via E. Bassini 15, 20133 Milano, Italy
Markus Schöller
Affiliation:
European Southern Observatory, Karl-Schwarzschild-Str. 2, 85748 Garching, Germany
Silva P. Järvinen
Affiliation:
Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, 14482 Potsdam, Germany email: shubrig@aip.de
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Abstract

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Previous circular polarization observations obtained with the ESO FOcal Reducer low dispersion spectrograpgh at the VLT in 2007–2008 revealed the presence of a weak longitudinal magnetic field on the surface of the optical component of the X-ray binary Cyg X-1, which contains a black hole and an O9.7Iab supergiant on a 5.6 d orbit. In this contribution we report on recently acquired FORS 2 spectropolarimetric observations of Cyg X-1 along with measurements of a few additional high-mass X-ray binaries.

Keywords

stars: magnetic fieldsstars: individual (BP Cru, Cyg X-1, Vela X-1, LS 5039)(stars:) supergiants(stars:) binaries: generalX-rays: stars

References

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