Accretion disks around black holes in modified strong gravity

Context. Stellar-mass black holes offer what is perhaps the best scenario to test theories of gravity in the strong-field regime. In particular, <i>f</i>(<i>R</i>) theories, which have been widely discus in a cosmological context, can be constrained through realistic astrophy...

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Detalles Bibliográficos
Autores principales: Pérez, Daniela, Romero, Gustavo Esteban, Perez Bergliaffa, Santiago Esteban
Formato: Articulo
Lenguaje:Inglés
Publicado: 2013
Materias:
Ciencias Astronómicas
Accretion, accretion disks
Black hole physics
Gravitation
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/85006
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-85006
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Accretion, accretion disks
Black hole physics
Gravitation
spellingShingle Ciencias Astronómicas
Accretion, accretion disks
Black hole physics
Gravitation
Pérez, Daniela
Romero, Gustavo Esteban
Perez Bergliaffa, Santiago Esteban
Accretion disks around black holes in modified strong gravity
topic_facet Ciencias Astronómicas
Accretion, accretion disks
Black hole physics
Gravitation
description Context. Stellar-mass black holes offer what is perhaps the best scenario to test theories of gravity in the strong-field regime. In particular, <i>f</i>(<i>R</i>) theories, which have been widely discus in a cosmological context, can be constrained through realistic astrophysical models of phenomena around black holes. Aims. We aim at building radiative models of thin accretion disks for both Schwarzschild and Kerr black holes in <i>f</i>(<i>R</i>) gravity. Methods. We study particle motion in <i>f</i>(<i>R</i>)-Schwarzschild and Kerr space-times. Results. We present the spectral energy distribution of the accretion disk around constant Ricci scalar <i>f</i>(<i>R</i>) black holes, and constrain specific <i>f</i>(<i>R</i>) prescriptions using features of these systems. Conclusions. A precise determination of both the spin and accretion rate onto black holes along with X-ray observations of their thermal spectrum might allow to identify deviations of gravity from general relativity. We use recent data on the high-mass X-ray binary Cygnus X-1 to restrict the values of the parameters of a class of <i>f</i>(<i>R</i>) models.
format Articulo
Articulo
author Pérez, Daniela
Romero, Gustavo Esteban
Perez Bergliaffa, Santiago Esteban
author_facet Pérez, Daniela
Romero, Gustavo Esteban
Perez Bergliaffa, Santiago Esteban
author_sort Pérez, Daniela
title Accretion disks around black holes in modified strong gravity
title_short Accretion disks around black holes in modified strong gravity
title_full Accretion disks around black holes in modified strong gravity
title_fullStr Accretion disks around black holes in modified strong gravity
title_full_unstemmed Accretion disks around black holes in modified strong gravity
title_sort accretion disks around black holes in modified strong gravity
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/85006
work_keys_str_mv AT perezdaniela accretiondisksaroundblackholesinmodifiedstronggravity
AT romerogustavoesteban accretiondisksaroundblackholesinmodifiedstronggravity
AT perezbergliaffasantiagoesteban accretiondisksaroundblackholesinmodifiedstronggravity
bdutipo_str Repositorios
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