Thin accretion disks and charged rotating dilaton black holes
General Relativity and Quantum Cosmology
2020-06-02 v1 High Energy Physics - Theory
Abstract
Einstein-Maxwell-dilaton theory is an interesting theory of gravity for studying scalar fields in the context of no-hair theorem. In this work, we consider static charged dilaton and charged, slowly rotating dilaton black holes in Einstein-Maxwell-dilaton gravity. We investigate the accretion process in thin disks around such black holes, using the Novikov-Thorne model. The electromagnetic flux, temperature distribution, energy conversion efficiency and also innermost stable circular orbits of thin disks are obtained and effects of dilaton and rotation parameters are studied. For the static and slowly rotating black holes the results are compared to that of Schwarzschild and Kerr, respectively.
Keywords
Cite
@article{arxiv.2004.05552,
title = {Thin accretion disks and charged rotating dilaton black holes},
author = {Mohaddese Heydari-fard and Malihe Heydari-Fard and Hamid Reza Sepangi},
journal= {arXiv preprint arXiv:2004.05552},
year = {2020}
}
Comments
15 pages, 6 figures, to appear in EPJC