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    The formation of the black hole in the X-ray binary system V404 Cyg

    Access Status
    Fulltext not available
    Authors
    Miller-Jones, James
    Jonker, P.
    Nelemans, G.
    Portegies Zwart, S.
    Dhawan, V.
    Brisken, W.
    Gallo, E.
    Rupen, M.
    Date
    2009
    Type
    Journal Article
    
    Metadata
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    Citation
    Miller-Jones, J. and Jonker, P. and Nelemans, G. and Portegies Zwart, S. and Dhawan, V. and Brisken, W. and Gallo, E. et al. 2009. The formation of the black hole in the X-ray binary system V404 Cyg. Monthly Notices of the Royal Astronomical Society. 394 (3): pp. 1440-1448.
    Source Title
    Monthly Notices of the Royal Astronomical Society
    Additional URLs
    http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2966.2009.14404.x/full
    ISSN
    1365-2966
    URI
    http://hdl.handle.net/20.500.11937/3291
    Collection
    • Curtin Research Publications
    Abstract

    Using new and archival radio data, we have measured the proper motion of the black hole X-ray binary V404 Cyg to be 9.2 ± 0.3 mas yr-1. Combined with the systemic radial velocity from the literature, we derive the full three-dimensional heliocentric space velocity of the system, which we use to calculate a peculiar velocity in the range 47–102 km s-1, with a best-fitting value of 64 km s-1. We consider possible explanations for the observed peculiar velocity and find that the black hole cannot have formed via direct collapse. A natal supernova is required, in which either significant mass (~11 M?) was lost, giving rise to a symmetric Blaauw kick of up to ~65 km s-1, or, more probably, asymmetries in the supernova led to an additional kick out of the orbital plane of the binary system. In the case of a purely symmetric kick, the black hole must have been formed with a mass ~9 M?, since when it has accreted 0.5–1.5 M? from its companion.

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