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  Models of mass segregation at the Galactic centre

Freitag, M., Amaro-Seoane, P., & Kalogera, V. (2006). Models of mass segregation at the Galactic centre. Journal of Physics: Conference Series, 54, 252-258. Retrieved from http://arxiv.org/abs/astro-ph/0607001.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-4CBE-1 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-4CBF-0
Genre: Journal Article

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 Creators:
Freitag, Marc, Author
Amaro-Seoane, Pau1, Author              
Kalogera, Vassiliki, Author
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1Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24013              

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 Abstract: 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.

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 Dates: 2006
 Publication Status: Published in print
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Title: Journal of Physics: Conference Series
Source Genre: Journal
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Pages: - Volume / Issue: 54 Sequence Number: - Start / End Page: 252 - 258 Identifier: -