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Brownian motion of supermassive black holes in galaxy cores

Published online by Cambridge University Press:  11 March 2020

Pierfrancesco Di Cintio Open the ORCID record for Pierfrancesco Di Cintio [Opens in a new window] ,
Luca Ciotti Open the ORCID record for Luca Ciotti [Opens in a new window]  and
Carlo Nipoti
Pierfrancesco Di Cintio
Affiliation:
IFAC-CNR, Via Madonna del piano 10, I-50019, Sesto Fiorentino (FI), Italy email: [email protected]
Luca Ciotti
Affiliation:
Department of Physics and Astronomy, Bologna University, Via Piero Gobetti 93/2 I-40129 Bologna, Italy
Carlo Nipoti
Affiliation:
Department of Physics and Astronomy, Bologna University, Via Piero Gobetti 93/2 I-40129 Bologna, Italy
Rights & Permissions [Opens in a new window]

Abstract

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We investigate the dynamics of supermassive black holes (SMBHs) in galactic cores by means of a semi-analytic model based on the Langevin equation, including dynamical friction and stochastic noise accounting for the gravitational interactions with stars. The model is validated against direct N-body simulations of intermediate-mass black holes in stellar clusters where a realistic number of particles is accessible. For the galactic case, we find that the SMBH experiences a Brownian-like motion with a typical displacement from the geometric center of the Galaxy of a few parsecs, for system parameters compatible with M87.

Keywords

stellar dynamicsblack hole physicsmethods: n-body simulationsmethods: statistical
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S351: Star Clusters: From the Milky Way to the Early Universe , May 2019 , pp. 93 - 96
Copyright
© International Astronomical Union 2020

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