SIMBAD references

2009ApJ...706L.230M - Astrophys. J., 706, L230-L234 (2009/December-1)

The first accurate parallax distance to a black hole.

MILLER-JONES J.C.A., JONKER P.G., DHAWAN V., BRISKEN W., RUPEN M.P., NELEMANS G. and GALLO E.

Abstract (from CDS):

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.

Abstract Copyright:

Journal keyword(s): astrometry - radio continuum: stars - stars: distances - stars: individual: V404 Cyg - stars: kinematics - X-rays: binaries

Simbad objects: 5

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2019.11.14-16:22:13

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