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Simulating the dynamics of binary black holes in nuclear gaseous discs


Dotti, M; Colpi, M; Haardt, F; Mayer, L (2008). Simulating the dynamics of binary black holes in nuclear gaseous discs. Proceedings of the International Astronomical Union, 245:241-242.

Abstract

We study the pairing of massive black holes embedded in a massive circum–nuclear, rotationally supported disc, until they form a close binary. Using high resolution SPH simulations, we follow the black hole dynamics, and in particular the eccentricity evolution, as a function of the composition in stars and gas of the disc. Binary–disc interaction always leads to orbital decay and, in case of co–rotating black holes, to orbit circularization. We present also a higher resolution simulation performed using the particle–splitting technique showing that the binary orbital decay is efficient down to a separation of ~ 0.1 pc, comparable to our new resolution limit. We detail the gaseous mass profile bound to each black hole. Double nuclear activity is expected to occur on an estimated timescale of xs2272 10 Myrs.

We study the pairing of massive black holes embedded in a massive circum–nuclear, rotationally supported disc, until they form a close binary. Using high resolution SPH simulations, we follow the black hole dynamics, and in particular the eccentricity evolution, as a function of the composition in stars and gas of the disc. Binary–disc interaction always leads to orbital decay and, in case of co–rotating black holes, to orbit circularization. We present also a higher resolution simulation performed using the particle–splitting technique showing that the binary orbital decay is efficient down to a separation of ~ 0.1 pc, comparable to our new resolution limit. We detail the gaseous mass profile bound to each black hole. Double nuclear activity is expected to occur on an estimated timescale of xs2272 10 Myrs.

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Additional indexing

Item Type:Journal Article, not refereed, original work
Communities & Collections:07 Faculty of Science > Institute for Computational Science
Dewey Decimal Classification:530 Physics
Language:English
Date:2008
Deposited On:06 Mar 2009 15:03
Last Modified:05 Apr 2016 13:06
Publisher:Cambridge University Press
ISSN:1743-9213
Additional Information:Copyright: Cambridge University Press
Publisher DOI:https://doi.org/10.1017/S1743921308017778
Permanent URL: https://doi.org/10.5167/uzh-16545

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