Observable acceleration of jets by a Kerr black hole

Abstract

In the framework of a model based on the gravitational field of the Kerr black hole, we turn to investigate the kinematic behavior of extragalactic jets. We analytically calculate the observable velocities and accelerations along any geodesic. Then, by numerical calculations, we apply our results to a geodesic, typical of the M87 jet, and probe our results by confrontation to recent observations. A transition from non-relativistic to ultrarelativistic speeds at subparsec scale is highlighted. This transition comes sooner and more abruptly than in models based on magnetic paradigm, which indicates that we need a weaker magnetic field to explain observed synchrotron radiation. We attribute the ejection phenomenon to the repulsive effect of the gravitomagnetic Kerr field.

revtex4, two tables and six figures. Some typos are corrected. Gen. Relativit. Grav. 49 (2017) 43

References in corpus (3)

• Periapsis and gravitomagnetic precessions of stellar orbits in Kerr and Kerr-de Sitter black hole spacetimes
• Gravitomagnetic Jets
• Unbound geodesics from the ergosphere and potential observability of debris from ultrahigh energy particle collisions

Cited by in corpus (7)

• Cylindrical Systems in General Relativity
• Geodesics of the hyperbolically symmetric black hole
• Relativistic Tidal Acceleration of Astrophysical Jets
• Static Cylindrical Symmetric Solutions in the Einstein-Aether Theory
• Comment on "Acceleration of particles to high energy via gravitational repulsion in the Schwarzschild field" by C. H. McGruder III
• Repulsive effect for the unbound high energy particles along the rotation axis in the Kerr-Taub-NUT spacetime
• Relativistic Tidal Accelerations in the Exterior Schwarzschild Spacetime