Magnetic coupling of a rotating black hole with advection-dominated accretion flows
Abstract
A model of magnetic coupling (MC) of a rotating black hole (BH) with advection-dominated accretion flow (MCADAF) is proposed. It turns out that MCADAF provides a natural explanation for the transition radius between ADAF and SSD, and could be used to interpret the highest luminosity of GX 339-4 in hard-state. A very steep emissivity index can be produced in the innermost part of the MCADAF, which is consistent with the recent XMM-Newton observations of the nearby bright Seyfert 1 galaxy MCG-6-30-15 and with two X-ray binaries (XRBs): XTE J1655-500 and GX 339-4. In addition, we estimate the BH spins in Seyfert 1 galaxy MCG-6-30-15 and in the two XRBs based on this model.
- Publication:
-
New Astronomy
- Pub Date:
- August 2007
- DOI:
- 10.1016/j.newast.2007.01.004
- arXiv:
- arXiv:astro-ph/0701802
- Bibcode:
- 2007NewA...12..471Y
- Keywords:
-
- 97.60.Lf;
- 04.70.-s;
- 95.85.Sz;
- 95.30.Lz;
- Black holes;
- Physics of black holes;
- Gravitational radiation magnetic fields and other observations;
- Hydrodynamics;
- Astrophysics
- E-Print:
- 18 pages, 9 figures,acceptted by New Astronomy
