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.
Keywords
Cite
@article{arxiv.1610.01241,
title = {Observable acceleration of jets by a Kerr black hole},
author = {J. Gariel and N. O. Santos and Anzhong Wang},
journal= {arXiv preprint arXiv:1610.01241},
year = {2017}
}
Comments
revtex4, two tables and six figures. Some typos are corrected. Gen. Relativit. Grav. 49 (2017) 43