Numerical estimates of the accretion rate on to intermediate-mass black holes

The existence of intermediate-mass (̃103M⊙) black holes (IMBHs) in the centre of globular clusters has been suggested by different observations. The X-ray sources observed in NGC 6388 and in G1 in M31 could be interpreted as being powered by the accretion of matter on to such objects. In this work,...

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Autores principales: Pepe, C., Pellizza, L.J.
Formato: JOUR
Materias:
Accretion
Accretion discs-black hole physics-globular clusters
General.
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00358711_v430_n4_p2789_Pepe
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_00358711_v430_n4_p2789_Pepe2023-10-03T14:47:07Z Numerical estimates of the accretion rate on to intermediate-mass black holes Pepe, C. Pellizza, L.J. Accretion Accretion discs-black hole physics-globular clusters General. The existence of intermediate-mass (̃103M⊙) black holes (IMBHs) in the centre of globular clusters has been suggested by different observations. The X-ray sources observed in NGC 6388 and in G1 in M31 could be interpreted as being powered by the accretion of matter on to such objects. In this work, we explore a scenario in which the black hole accretes from the cluster interstellar medium, which is generated by the mass-loss of the red giants in the cluster. We estimate the accretion rate on to the black hole and compare it to the values obtained via the traditional Bondi-Hoyle model. Our results show that the accretion rate is no longer solely defined by the black hole mass and the ambient parameters but also by the host cluster itself. Furthermore, we find that the more massive globular clusters with large stellar velocity dispersion are the best candidates in which accretion on to IMBHs could be detected © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00358711_v430_n4_p2789_Pepe
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Accretion
Accretion discs-black hole physics-globular clusters
General.
spellingShingle Accretion
Accretion discs-black hole physics-globular clusters
General.
Pepe, C.
Pellizza, L.J.
Numerical estimates of the accretion rate on to intermediate-mass black holes
topic_facet Accretion
Accretion discs-black hole physics-globular clusters
General.
description The existence of intermediate-mass (̃103M⊙) black holes (IMBHs) in the centre of globular clusters has been suggested by different observations. The X-ray sources observed in NGC 6388 and in G1 in M31 could be interpreted as being powered by the accretion of matter on to such objects. In this work, we explore a scenario in which the black hole accretes from the cluster interstellar medium, which is generated by the mass-loss of the red giants in the cluster. We estimate the accretion rate on to the black hole and compare it to the values obtained via the traditional Bondi-Hoyle model. Our results show that the accretion rate is no longer solely defined by the black hole mass and the ambient parameters but also by the host cluster itself. Furthermore, we find that the more massive globular clusters with large stellar velocity dispersion are the best candidates in which accretion on to IMBHs could be detected © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.
format JOUR
author Pepe, C.
Pellizza, L.J.
author_facet Pepe, C.
Pellizza, L.J.
author_sort Pepe, C.
title Numerical estimates of the accretion rate on to intermediate-mass black holes
title_short Numerical estimates of the accretion rate on to intermediate-mass black holes
title_full Numerical estimates of the accretion rate on to intermediate-mass black holes
title_fullStr Numerical estimates of the accretion rate on to intermediate-mass black holes
title_full_unstemmed Numerical estimates of the accretion rate on to intermediate-mass black holes
title_sort numerical estimates of the accretion rate on to intermediate-mass black holes
url http://hdl.handle.net/20.500.12110/paper_00358711_v430_n4_p2789_Pepe
work_keys_str_mv AT pepec numericalestimatesoftheaccretionrateontointermediatemassblackholes
AT pellizzalj numericalestimatesoftheaccretionrateontointermediatemassblackholes
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