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          Institute: MPI für Gravitationsphysik     Collection: Astrophysical Relativity     Display Documents



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ID: 318889.0, MPI für Gravitationsphysik / Astrophysical Relativity
Models of mass segregation at the Galactic centre
Authors:Freitag, Marc; Amaro-Seoane, Pau; Kalogera, Vassiliki
Date of Publication (YYYY-MM-DD):2006
Title of Journal:Journal of Physics: Conference Series
Volume:54
Start Page:252
End Page:258
Review Status:not specified
Audience:Not Specified
Abstract / Description:We study the process of mass segregation through 2-body relaxation in galactic nuclei with a central massive black hole (MBH). This study has bearing on a variety of astrophysical questions, from the distribution of X-ray binaries at the Galactic centre, to tidal disruptions of main-sequence and giant stars, to inspirals of compact objects into the MBH, an important category of events for the future space borne gravitational wave interferometer LISA. In relatively small galactic nuclei, typical hosts of MBHs with masses in the range 1e4-1e7 Msun, the relaxation induces the formation of a steep density cusp around the MBH and strong mass segregation. Using a spherical stellar dynamical Monte-Carlo code, we simulate the long-term relaxational evolution of galactic nucleus models with a spectrum of stellar masses. Our focus is the concentration of stellar black holes to the immediate vicinity of the MBH. Special attention is given to models developed to match the conditions in the Milky Way nucleus.
External Publication Status:published
Document Type:Article
Communicated by:Bernhard F. Schutz
Affiliations:MPI für Gravitationsphysik/Astrophysical Relativity
Identifiers:URL:http://arxiv.org/abs/astro-ph/0607001
URL:http://www.iop.org/EJ/abstract/-search=26406046.1/...
LOCALID:arXiv:astro-ph/0607001
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