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On the nature of the “radio quiet” black hole binaries

Published online by Cambridge University Press:  24 February 2011

Paolo Soleri  and
Rob Fender
Paolo Soleri
Affiliation:
Kapteyn Astronomical Institute, University of Groningen, PO BOX 800, 9700 AV Groningen, the Netherlands email: soleri@astro.rug.nl
Rob Fender
Affiliation:
School of Physics and Astronomy, University of Southampton, Hampshire SO17 1BJ Southampton, United Kingdom email: R.Fender@soton.ac.uk
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Abstract

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The accretion/ejection coupling in accreting black hole binaries has been described by empirical relations between the X-ray/radio and X-ray/optical-infrared luminosities. These correlations were initially supposed to be universal. However, recently many sources have been found to produce jets that, given certain accretion-powered luminosities, are fainter than expected from the correlations. This shows that black holes with similar accretion flows can produce a broad range of outflows in power Here we discuss whether typical parameters of the binary system, as well as the properties of the outburst, produce any effect on the energy output in the jet. We also define a jet-toy model in which the bulk Lorentz factor becomes larger than ~1 above ~0.1% of the Eddington luminosity. We finally compare the “radio quiet” black holes with the neutron stars.

Keywords

X-rays: binariesISM: jets and outflowsaccretionaccretion disks
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S275: Jets at all Scales , September 2010 , pp. 265 - 269
Copyright
Copyright © International Astronomical Union 2011

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