A scheme to unify low-power accreting black holes. Jet-dominated accretion flows and the radio/X-ray correlation
Falcke, H., Koerding, E. and Markoff, S. (2004) A scheme to unify low-power accreting black holes. Jet-dominated accretion flows and the radio/X-ray correlation. Astronomy & Astrophysics, 414, (3), 895-903. (doi:10.1051/0004-6361:20031683).
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Description/Abstract
We explore the evolution in power of black holes of all masses, and their associated jets, within the scheme of an accretion rate-dependent state transition. Below a critical value of the accretion rate all systems are assumed to undergo a transition to a state where the dominant accretion mode is optically thin and radiatively inefficient. In these significantly sub-Eddington systems, the spectral energy distribution is predicted to be dominated by non-thermal emission from a relativistic jet whereas near-Eddington black holes will be dominated instead by emission from the accretion disk. Reasonable candidates for such a sub-Eddington state include x-ray binaries in the hard and quiescent states, the Galactic Center (Sgr A*), LINERs, FR I radio galaxies, and a large fraction of BL Lac objects. Standard jet physics predicts non-linear scaling between the optically thick (radio) and optically thin (optical or x-ray) emission of these systems, which has been confirmed recently in x-ray binaries. We show that this scaling relation is also a function of black hole mass and only slightly of the relativistic Doppler factor. Taking the scaling into account we show that indeed hard and quiescent state x-ray binaries, LINERs, FR I radio galaxies, and BL Lacs can be unified and fall on a common radio/x-ray correlation. This suggests that jet domination is an important stage in the luminosity evolution of accreting black hole systems.
| Item Type: | Article |
|---|---|
| ISSNs: | 0004-6361 (print) |
| Related URLs: | |
| Keywords: | x-rays, binaries - radiation mechanisms, non-thermal - stars, winds, outflows - black hole physics - accretion, accretion disks |
| Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
| Divisions: | University Structure - Pre August 2011 > School of Physics and Astronomy |
| Item ID: | 45363 |
| Date Deposited: | 22 Mar 2007 |
| Last Modified: | 01 Jun 2011 02:23 |
| Contributors: | Falcke, H. (Author) Koerding, E. (Author) Markoff, S. (Author) |
| Date: | 2004 |
| Status: | Published |
| Contact Email Address: | falcke@astron.nl |
| URI: | http://eprints.soton.ac.uk/id/eprint/45363 |
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