Dynamics of galactic nuclei: Mass segregation and collisions
Marc Freitag (IoA, Cambridge), James E. Dale (Lund Observatory), Ross, P. Church (Monash University), Melvyn B. Davies (Lund Observatory)
TL;DR
This paper explores the complex dynamics at galactic nuclei, emphasizing mass segregation of stellar black holes and the impact of stellar collisions on star populations near massive black holes.
Contribution
It highlights the significance of mass segregation and hydrodynamical collisions in shaping the stellar environment around black holes in galactic centers.
Findings
Mass segregation concentrates stellar-mass black holes near the galactic center.
Stellar collisions significantly influence giant stars and S-stars.
Collisions may alter the evolution of stars close to the MBH.
Abstract
Massive black holes (MBHs) with a mass below ~ 1e7 Msun are likely to reside at the centre of dense stellar nuclei shaped by 2-body relaxation, close interactions with the MBH and direct collisions. In this contribution, we stress the role of mass segregation of stellar-mass black holes into the innermost tenths of a parsec and point to the importance of hydrodynamical collisions between stars. At the Galactic centre, collisions must affect giant stars and some of the S-stars.
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