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    The First Accurate Parallax Distance to a Black Hole

    Access Status
    Fulltext not available
    Authors
    Miller-Jones, James
    Jonker, P.
    Dhawan, V.
    Brisken, W.
    Rupen, M.
    Nelemans, G.
    Gallo, E.
    Date
    2009
    Type
    Journal Article
    
    Metadata
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    Citation
    Miller-Jones, J. and Jonker, P. and Dhawan, V. and Brisken, W. and Rupen, M. and Nelemans, G. and Gallo, E. 2009. The First Accurate Parallax Distance to a Black Hole. The Astrophysical Journal. 706 (2): pp. L230-L234.
    Source Title
    The Astrophysical Journal
    Additional URLs
    http://iopscience.iop.org/1538-4357/706/2/L230/
    ISSN
    0004637X
    URI
    http://hdl.handle.net/20.500.11937/25727
    Collection
    • Curtin Research Publications
    Abstract

    Using astrometric VLBI observations, we have determined the parallax of the black hole X-ray binary V404 Cyg to be 0.418 ± 0.024 mas, corresponding to a distance of 2.39 ± 0.14 kpc, significantly lower than the previously accepted value. This model-independent estimate is the most accurate distance to a Galactic stellar-mass black hole measured to date. With this new distance, we confirm that the source was not super-Eddington during its 1989 outburst. The fitted distance and proper motion imply that the black hole in this system likely formed in a supernova, with the peculiar velocity being consistent with a recoil (Blaauw) kick. The size of the quiescent jets inferred to exist in this system is <1.4 AU at 22 GHz. Astrometric observations of a larger sample of such systems would provide useful insights into the formation and properties of accreting stellar-mass black holes.

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