Magnetic Fields of Black Holes and the Variability Plane

Abstract

We estimated the magnetic field strength at the horizon radius of black holes, that is derived by the magnetic coupling process and depended on the black hole mass $M_{BH}$ and the accretion rate $\dot{M}$. Our estimation is based on the use of the fundamental variability plane for stellar mass black holes, AGNs and QSOs. The typical values of magnetic field strength on the black hole horizon are appeared at the level of $B_{BH}\sim 10^8$G for stellar mass black holes and $B_{BH}\sim 10^4$G for the supermassive black holes. We have obtained the relation $p_l\sim {\nu }_b^{-1/2}$ between the intrinsic polarization of the accretion disk radiation and the characteristic frequency of the black hole X-ray variability.

4 pages

References in corpus (4)

• Measuring the Spins of Stellar Black Holes: A Progress Report
• Magnetic Field Measurement in Black Hole X-Ray Binary Cygnus X-1
• Do Black Hole Candidates Have Magnetic Moments Instead of Event Horizons?
• Magnetic and Electric Fields around the Black Hole in Cyg X-1

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