Thin accretion disks and charged rotating dilaton black holes

Thin accretion disks and charged rotating dilaton black holes

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 accreti...

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Main Authors: Mohaddese Heydari-Fard, Malihe Heydari-Fard, Hamid Reza Sepangi
Format: Article
Language:English
Published: SpringerOpen 2020-04-01
Series:European Physical Journal C: Particles and Fields
Online Access:http://link.springer.com/article/10.1140/epjc/s10052-020-7911-0
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spelling doaj-22686b6816b348cf96c4628769c49c382020-11-25T02:54:37ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60441434-60522020-04-0180411010.1140/epjc/s10052-020-7911-0Thin accretion disks and charged rotating dilaton black holesMohaddese Heydari-Fard0Malihe Heydari-Fard1Hamid Reza Sepangi2Department of Physics, Shahid Beheshti UniversityDepartment of Physics, The University of QomDepartment of Physics, Shahid Beheshti UniversityAbstract 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.http://link.springer.com/article/10.1140/epjc/s10052-020-7911-0
collection DOAJ
language English
format Article
sources DOAJ
author Mohaddese Heydari-Fard
Malihe Heydari-Fard
Hamid Reza Sepangi
spellingShingle Mohaddese Heydari-Fard
Malihe Heydari-Fard
Hamid Reza Sepangi
Thin accretion disks and charged rotating dilaton black holes
European Physical Journal C: Particles and Fields
author_facet Mohaddese Heydari-Fard
Malihe Heydari-Fard
Hamid Reza Sepangi
author_sort Mohaddese Heydari-Fard
title Thin accretion disks and charged rotating dilaton black holes
title_short Thin accretion disks and charged rotating dilaton black holes
title_full Thin accretion disks and charged rotating dilaton black holes
title_fullStr Thin accretion disks and charged rotating dilaton black holes
title_full_unstemmed Thin accretion disks and charged rotating dilaton black holes
title_sort thin accretion disks and charged rotating dilaton black holes
publisher SpringerOpen
series European Physical Journal C: Particles and Fields
issn 1434-6044
1434-6052
publishDate 2020-04-01
description 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.
url http://link.springer.com/article/10.1140/epjc/s10052-020-7911-0
work_keys_str_mv AT mohaddeseheydarifard thinaccretiondisksandchargedrotatingdilatonblackholes
AT maliheheydarifard thinaccretiondisksandchargedrotatingdilatonblackholes
AT hamidrezasepangi thinaccretiondisksandchargedrotatingdilatonblackholes
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