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Abstract:

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.

Registro:

Documento: Artículo
Título:Numerical estimates of the accretion rate on to intermediate-mass black holes
Autor:Pepe, C.; Pellizza, L.J.
Filiación:Instituto de Astronomía y Física del Espacio, Casilla de Correos 67, Suc. 28, 1428 Buenos Aires, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas, CONICET, Argentina
Palabras clave:Accretion; Accretion discs-black hole physics-globular clusters; General.
Año:2013
Volumen:430
Número:4
Página de inicio:2789
Página de fin:2796
DOI: http://dx.doi.org/10.1093/mnras/stt080
Título revista:Monthly Notices of the Royal Astronomical Society
Título revista abreviado:Mon. Not. R. Astron. Soc.
ISSN:00358711
CODEN:MNRAA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00358711_v430_n4_p2789_Pepe

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Citas:

---------- APA ----------
Pepe, C. & Pellizza, L.J. (2013) . Numerical estimates of the accretion rate on to intermediate-mass black holes. Monthly Notices of the Royal Astronomical Society, 430(4), 2789-2796.
http://dx.doi.org/10.1093/mnras/stt080
---------- CHICAGO ----------
Pepe, C., Pellizza, L.J. "Numerical estimates of the accretion rate on to intermediate-mass black holes" . Monthly Notices of the Royal Astronomical Society 430, no. 4 (2013) : 2789-2796.
http://dx.doi.org/10.1093/mnras/stt080
---------- MLA ----------
Pepe, C., Pellizza, L.J. "Numerical estimates of the accretion rate on to intermediate-mass black holes" . Monthly Notices of the Royal Astronomical Society, vol. 430, no. 4, 2013, pp. 2789-2796.
http://dx.doi.org/10.1093/mnras/stt080
---------- VANCOUVER ----------
Pepe, C., Pellizza, L.J. Numerical estimates of the accretion rate on to intermediate-mass black holes. Mon. Not. R. Astron. Soc. 2013;430(4):2789-2796.
http://dx.doi.org/10.1093/mnras/stt080