On the nature of the "radio quiet" black hole binaries

Details On the nature of the "radio quiet" black hole binaries On the nature of the "radio quiet" black hole binaries

2010-11-17

arxiv.org/abs/1011.3955v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

in the Proceedings of IAU Symposium 275, "Jets at all Scales", Buenos Aires, Argentina, 13-17 September 2010, eds. G.E. Romero

Scientific paper

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.

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