Jet-dominated advective systems of all mass scales

Details Jet-dominated advective systems of all mass scales Jet-dominated advective systems of all mass scales

2006-11-21

arxiv.org/abs/astro-ph/0611674v1

Astronomy and Astrophysics

Astrophysics

conference proceedings of the Sixth Microquasar workshop: Microquasars and Beyond, 18-22 September 2006 in Como, Italy (eds: T

Scientific paper

We show that the radio emission of black hole (BH) and neutron star (NS) X-ray binaries (XRBs) follows the analytical prediction of a jet model where the jet carries a constant fraction of the accretion power. The radio emission can therefore be used as a tracer of the accretion rate. This measure is normalised with efficiently radiating objects. As it is independent of the X-ray fluxes, the measure allows us to compare the accretion rate dependency of the bolometric X-ray luminosity of BHs and NSs. For NSs, it scales linearly with accretion rate while the scaling for BHs is quadratic - as expected for inefficient accretion flows. We find the same behaviour in AGN. This new approach uses the jet power to obtain the accretion rate. Thus, we know both the jet power and the radiated power of an accreting BH. This allows us to show that some accretion power is likely to be advected into the black hole, while the jet power dominates over the bolometric luminosity of a hard state BH.

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