We study the inspiral of double black holes orbiting inside a massive rotationally supported gaseous disk with masses in the Laser Interferometer Space Antenna (LISA) window of detectability. Using high-resolution SPH simulations, we follow the black hole dynamics in the early phase when gas-dynamical friction acts on the black holes individually, and continue our simulation until they form a close binary. We find that in the early sinking the black holes lose memory of their initial orbital eccentricity, if they co-rotate with the gaseous disk. As a consequence the massive black holes form a binary with very low eccentricity. During the inspiral, gravitational capture of gas by the black holes occurs mainly when they move on circular orbits and may ignite AGN activity: eccentric orbits imply instead high relative velocities and weak gravitational focusing. © 2008 Springer-Verlag Berlin Heidelberg.
Dotti, M., Colpi, M., & Haardt, F. (2008). Inspiral of double black holes in gaseous nuclear disks. In B. Aschenbach, V. Burwitz, & G. Hasinger (a cura di), Relativistic Astrophysics and Cosmology - Einstein's Legacy: Proceedings of the MPE/USM/MPA/ESO Joint Astronomy Conference Held in Munich, Germany, 7-11 November 2005 (pp. 125-128). Springer-Verlag.
Citazione: | Dotti, M., Colpi, M., & Haardt, F. (2008). Inspiral of double black holes in gaseous nuclear disks. In B. Aschenbach, V. Burwitz, & G. Hasinger (a cura di), Relativistic Astrophysics and Cosmology - Einstein's Legacy: Proceedings of the MPE/USM/MPA/ESO Joint Astronomy Conference Held in Munich, Germany, 7-11 November 2005 (pp. 125-128). Springer-Verlag. |
Titolo: | Inspiral of double black holes in gaseous nuclear disks |
Autori: | Dotti, M; Colpi, M; Haardt, F |
Autori: | COLPI, MONICA (Secondo) |
Presenza di un coautore afferente ad Istituzioni straniere: | No |
Tipo: | Capitolo o saggio |
Carattere della pubblicazione: | Scientifica |
Data di pubblicazione: | 2008 |
Lingua: | English |
Titolo del libro: | Relativistic Astrophysics and Cosmology - Einstein's Legacy: Proceedings of the MPE/USM/MPA/ESO Joint Astronomy Conference Held in Munich, Germany, 7-11 November 2005 |
ISBN: | 3540747125 |
Appare nelle tipologie: | 03 - Contributo in libro |