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The magnetic field in the X-ray binary Cyg X-1

Published online by Cambridge University Press:  01 November 2008

Eugenia A. Karitskaya ,
N. G. Bochkarev ,
S. Hubrig ,
Yu. N. Gnedin ,
M. A. Pogodin ,
R. V. Yudin ,
M. I. Agafonov  and
O. I. Sharova
Eugenia A. Karitskaya
Affiliation:
Astronomical Institute of RAS, 48 Pyatnitskaya str., Moscow 119017, Russia, email: karitsk@sai.msu.ru
N. G. Bochkarev
Affiliation:
Sternberg Astronomical Institute 13 Universitetskij pr., Moscow 119991, Russia
S. Hubrig
Affiliation:
ESO, Santiago, Chile
Yu. N. Gnedin
Affiliation:
Pulkovo Observatory RAS, St. Petersburg 196140, Russia
M. A. Pogodin
Affiliation:
Pulkovo Observatory RAS, St. Petersburg 196140, Russia
R. V. Yudin
Affiliation:
Pulkovo Observatory RAS, St. Petersburg 196140, Russia
M. I. Agafonov
Affiliation:
Radiophysical Research Institute, Nizhny Novgorod 603950, Russia
O. I. Sharova
Affiliation:
Radiophysical Research Institute, Nizhny Novgorod 603950, Russia
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Abstract

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VLT FORS 1 observations indicate the presence of a variable significant magnetic field in the X-ray binary Cyg X-1. The importance of this investigation comes from the fact that it rules one of the most significant BH manifestations: the X-ray millisecond flickering, usually related to reconnection of magnetic lines in the innermost part of the accretion disc.

Keywords

X-ray binaries – black hole physics – magnetic fields – spectropolarimetry – accretion

References

Agafonov, M. I. 2004, AN 325, 259Google Scholar
Gnedin, Yu. N. et al. 2003, astro-ph/4158GGoogle Scholar
Hubrig, S., Kurtz, D. W., Bagnulo, S. et al. 2004, A&A 415, 661Google Scholar
Shvartsman, V. F. 1971, AZh 48, 479Google Scholar