Get started
Work

Dynamical evolutions in globular clusters and dwarf galaxies: Conduction fluid simulations

Year: 2025
Type: article
Abstract: We present a new two-fluid conduction scheme to simulate the evolution of an isolated, self-gravitating, equilibrium cluster of stars and collisionless dark matter on secular (gravothermal) timescales. We integrate the equations in Lagrangian coordinates via a second-order, semi-implicit algorithm, which is unconditionally stable when the mass of the lighter species is much less than that of the heavier species. The method can be straightforwardly generalized to handle a multi-species system with a population of stars or components beyond collisionless dark matter and stars. We apply the method to simulate the dynamical evolution of stellar-dark matter systems, exploring the consequences of mass segregation and gravothermal core collapse, and assessing those effects for observed globular clusters and dwarf galaxies in the Local Volume.
DOI: 10.1103/z1fy-2p8s
Language: English
Open Access status: green
Funders: National Science Foundation, Glaucoma Research Foundation, City University of Hong Kong, Research Grants Council, University Grants Committee, University of Illinois at Urbana-Champaign, Kavli Institute for Theoretical Physics, University of California, Santa Barbara
Awards: G2229532080, G231644337, Theoretical Studies in Gravitation and Astrophysics, G5299299992, Kavli Institute for Theoretical Physics, Programs on Critical Problems in Physics, Astrophysics and Biophysics at the Aspen Center for Physics, Theoretical Studies in Gravitation and Astrophysics
OpenAlex ID: W4411721936
FWCI: 0.914
Cites: 51
Cited by: 2
Related to: 10