Polarimetry of QQ Vul |
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| Authors: | MarkCropper |
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| Institution: | Mullard Space Science Laboratory, University College London, Holmbury St Mary, Dorking, Surrey RH5 6NT; Department of Astronomy, University of Cape Town, Rondebosch 7700, South Africa |
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| Abstract: | This paper presents an investigation of the polarization behaviour of the AM Her system QQ Vul at several epochs over 3 years. There are changes of a factor of 2 in the amplitude of the orbitally phased circular polarization from epoch to epoch. The mean behaviour can be modelled with an accretion arc ahead of and closer to the orbital plane than the magnetic pole, but it has proven difficult to link the changes in polarization with changes in the location of the accretion region. The paper concludes with an investigation into whether the variations are periodic, but the evidence for this is marginal. |
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| Keywords: | accretion accretion discs polarization stars: individual: QQ Vul stars: magnetic fields novae cataclysmic variables X-rays: stars |
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