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Accretion-outflow connection in the outliers of the “universal” radio/X-ray correlation

Published online by Cambridge University Press:  24 February 2011

M. Coriat
Affiliation:
Laboratoire AIM, CEA-IRFU/CNRS/Université Paris Diderot, CEA Saclay, F-91191 Gif-sur-Yvette, France email: mickael.coriat@cea.fr, stephane.corbel@cea.fr, lionel.prat@cea.fr, david.cseh@cea.fr, jerome.rodriguez@cea.fr
S. Corbel
Affiliation:
Laboratoire AIM, CEA-IRFU/CNRS/Université Paris Diderot, CEA Saclay, F-91191 Gif-sur-Yvette, France email: mickael.coriat@cea.fr, stephane.corbel@cea.fr, lionel.prat@cea.fr, david.cseh@cea.fr, jerome.rodriguez@cea.fr
L. Prat
Affiliation:
Laboratoire AIM, CEA-IRFU/CNRS/Université Paris Diderot, CEA Saclay, F-91191 Gif-sur-Yvette, France email: mickael.coriat@cea.fr, stephane.corbel@cea.fr, lionel.prat@cea.fr, david.cseh@cea.fr, jerome.rodriguez@cea.fr
J. C. A. Miller-Jones
Affiliation:
NRAO Headquarters, 520 Edgemont Road, Charlottesville, VA 22903, USA email: james.miller-jones@curtin.edu.au
D. Cseh
Affiliation:
Laboratoire AIM, CEA-IRFU/CNRS/Université Paris Diderot, CEA Saclay, F-91191 Gif-sur-Yvette, France email: mickael.coriat@cea.fr, stephane.corbel@cea.fr, lionel.prat@cea.fr, david.cseh@cea.fr, jerome.rodriguez@cea.fr
A. K. Tzioumis
Affiliation:
Australia Telescope National Facility, CSIRO, P.O. Box 76, Epping, NSW 1710, Australia email: tasso.tzioumis@csiro.au
C. Brocksopp
Affiliation:
Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey RH5 6NT, UK email: cb4@mssl.ucl.ac.uk
J. Rodriguez
Affiliation:
Laboratoire AIM, CEA-IRFU/CNRS/Université Paris Diderot, CEA Saclay, F-91191 Gif-sur-Yvette, France email: mickael.coriat@cea.fr, stephane.corbel@cea.fr, lionel.prat@cea.fr, david.cseh@cea.fr, jerome.rodriguez@cea.fr
R. P. Fender
Affiliation:
School of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, UK email: r.fender@soton.ac.uk
G. R. Sivakoff
Affiliation:
Department of Astronomy, University of Virgina, P.O. Box 400325, Charlottesville, VA 22904-4325, USA email: grs8g@virginia.edu
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Abstract

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In recent years, numerous efforts have been devoted to unravel the connection between accretion flow and jets in accreting compact objects. Here we report new constraints on these issues, through the long term study of the radio and X-ray behaviour of the black hole candidate H 1743–322. This source is known to be one of the “outliers” of the universal radio/X-ray correlation, i.e. a group of stellar mass accreting black holes displaying fainter radio emission for a given X-ray luminosity, than expected from the correlation. In this work we find, at high X-ray luminosity in the hard state, a tight radio/X-ray correlation with an unusual steep slope of b = 1.38 ± 0.03. This correlation then breaks below ~5 × 10−3LEdd (M/10M)−1 in X-rays and becomes shallower. When compared with radio/X-ray data from other black hole X-ray binaries, we see that the deviant points of H 1743–322 join the universal correlation and seem to follow it at low luminosity. Based on these results, we investigate several hypotheses that could explain both the b ~ 1.4 slope and the transition toward the universal correlation.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2011

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