Black hole magnetosphere with small scale flux tubes

Abstract

There is observational evidence that the X-ray continuum source that creates the broad fluorescent emission lines in some Seyfert Galaxies may be compact and located at a few gravitational radii above the black hole. We consider the possibility that this compact source may be powered by small scale flux tubes near the black hole that are attached to the orbiting accretion disk. As a first step, this paper investigates the salient features of black hole magnetospheres that contain small scale, disk-hole linking "closed" flux tubes, using the force-free approximation in an axisymmetric setting. We find that the extent of the closed zone is a result of the balance between the black hole spin induced twist in the closed zone and the confinement pressure of the external (open) field of the disk. The maximal extent of the closed zone, for a typical external confinement, is usually a few gravitational radii. The pressure competition between the closed zone and the external confinement could in principle lead to interesting dynamics and dissipation relevant for the compact X-ray corona.

14 pages, 18 figures. Accepted for publication in MNRAS

References in corpus (10)

• X-ray Properties of Black-Hole Binaries
• X-ray reverberation around accreting black holes
• Stability of Relativistic Jets from Rotating, Accreting Black Holes via Fully Three-Dimensional Magnetohydrodynamic Simulations
• A global look at X-ray time lags in Seyfert Galaxies
• A Reverberation-Based Mass for the Central Black Hole in NGC 4151
• A Breakout Model for Solar Coronal Jets with Filaments
• Driving extreme variability: The evolving corona and evidence for jet launching in Markarian 335
• X-Ray and Optical Microlensing in the Lensed Quasar PG 1115+080
• Black-hole jets without large-scale net magnetic flux
• Black Hole Magnetospheres

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