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THE FIRST ACCURATE PARALLAX DISTANCE TO A BLACK HOLE

Author(s)
Miller-Jones, J. C. A.; Jonker, P. G.; Dhawan, V.; Brisken, W.; Rupen, M. P.; Nelemans, G.; Gallo, Elena; ... Show more Show less
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Abstract
Using astrometric VLBI observations, we have determined the parallax of the black hole X-ray binary V404 Cyg to be 0.418 [plus or minus sign] 0.024 mas, corresponding to a distance of 2.39 [plus or minus sign] 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.
Date issued
2009-12
URI
http://hdl.handle.net/1721.1/95802
Department
MIT Kavli Institute for Astrophysics and Space Research
Journal
Astrophysical Journal
Publisher
Institute of Physics/American Astronomical Society
Citation
Miller-Jones, J. C. A., P. G. Jonker, V. Dhawan, W. Brisken, M. P. Rupen, G. Nelemans, and E. Gallo. “THE FIRST ACCURATE PARALLAX DISTANCE TO A BLACK HOLE.” The Astrophysical Journal 706, no. 2 (November 12, 2009): L230–L234. © 2009 American Astronomical Society.
Version: Final published version
ISSN
0004-637X
1538-4357

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