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Behaviour of the iron line in Cygnus X-1 during dips and persistent emission

  • II. X-ray Binaries
  • Conference paper
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Iron Line Diagnostics in X-ray Sources

Part of the book series: Lecture Notes in Physics ((LNP,volume 385))

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Abstract

The Exosat GSPC observations of Cygnus X-1 have been analysed to study the behaviour of the iron line during dips and persistent emission. The energy of the emission line is approximately 6.3 keV for the persistent emission. The absolute intensity of the line and its equivalent width increase during dips. For one dip a broad emission line (FWHM ~ 2.6 keV) at 5.8 keV can be seen. This behaviour is discussed in terms of Comptonisation of the incident X-rays in relatively cold material, possibly associated with the stellar wind of the secondary.

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Author information

Authors and Affiliations

  1. School of Physics and Space Research, University of Birmingham, UK

    Monika Bałucińska-Church

  2. Astrophysics Division, ESTEC, Exosat Observatory, Holland

    Paul Barr

Authors
  1. Monika Bałucińska-Church
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  2. Paul Barr
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Editor information

A. Treves G. C. Perola L. Stella

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© 1991 Springer-Verlag

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Bałucińska-Church, M., Barr, P. (1991). Behaviour of the iron line in Cygnus X-1 during dips and persistent emission. In: Treves, A., Perola, G.C., Stella, L. (eds) Iron Line Diagnostics in X-ray Sources. Lecture Notes in Physics, vol 385. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0031283

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  • DOI: https://doi.org/10.1007/BFb0031283

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-54354-1

  • Online ISBN: 978-3-540-47583-5

  • eBook Packages: Springer Book Archive

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