Logo image
Back
A Dynamical Model for the Globular Cluster G1
Journal article   Open access

A Dynamical Model for the Globular Cluster G1

Holger Baumgardt, Junichiro Makino, Piet Hut, Steve McMillan and Simon Portegies Zwart
The Astrophysical journal, v 589(1), pp L25-L28
23 Jan 2003
DOI: https://doi.org/10.1086/375802
url
https://doi.org/10.1086/375802View
Published, Version of Record (VoR)Open Access (License Unspecified),  Open

Abstract

Physics - Astrophysics of Galaxies Physics - Cosmology and Nongalactic Astrophysics Physics - Earth and Planetary Astrophysics Physics - High Energy Astrophysical Phenomena Physics - Instrumentation and Methods for Astrophysics Physics - Solar and Stellar Astrophysics
Astrophys.J. 589 (2003) L25-L28 We present a comparison between the observational data on the kinematical structure of G1 in M31, obtained with the Hubble WFPC2 and STIS instruments, and the results of dynamical simulations carried out using the special-purpose computer GRAPE-6. We have obtained good fits for models starting with single cluster King-model initial conditions and even better fits when starting our simulations with a dynamically constructed merger remnant of two star clusters. In the latter case, the results from our simulations are in excellent agreement with the observed profiles of luminosity, velocity dispersion, rotation, and ellipticity. We obtain a mass-to-light ratio of $M/L = 4.0 \pm 0.4$ and a total cluster mass of $M=(8\pm 1)\times 10^6 M_\odot$. Given that our dynamical model can fit all available observational data very well, there seems to be no need to invoke the presence of an intermediate-mass black hole in the center of G1.

Metrics

5 Record Views
139 citations in Web of Science
137 citations in Scopus

Details

InCites Highlights

Data related to this publication, from InCites Benchmarking & Analytics tool:

Collaboration types
Domestic collaboration
International collaboration
Web of Science research areas
Astronomy & Astrophysics
Logo image