Characterizing a cluster’s dynamic state using a single epoch of radial velocities

2012/09/12 by Michiel Cottaar, M. Cottaar, Michael R. Meyer +3 · 1 citation
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics and Star Formation Studies #Binary number #Binary star #Cluster (spacecraft) #Eccentricity (behavior) #Monte Carlo method #Orbital elements #Radial velocity #Stars #Stellar dynamics #Stellar, planetary, and galactic studies #Velocity dispersion #astro-ph.GA #astro-ph.SR

paper · pdf · doi:10.1051/0004-6361/201219673

11 pages, 6 figures, accepted by A&A

arxiv created 2012/09/12 · openalex publication_date 2012/09/17 · arxiv updated 2015/06/11 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Context. Radial velocity measurements can be used to constrain the dynamical state of a stellar cluster. However, for clusters with velocity dispersions smaller than a few km s-1 the observed radial velocity distribution tends to be dominated by the orbital motions of binaries rather than the stellar motions through the potential well of the cluster.

Citations

• WIYN OPEN CLUSTER STUDY. XXXVIII. STELLAR RADIAL VELOCITIES IN THE YOUNG OPEN CLUSTER M35 (NGC 2168)
• The dynamical distance and intrinsic structure of the globular clusterωCentauri
• Spatial dependence of 2MASS luminosity and mass functions in the old open cluster NGC 188
• Galactic Stellar and Substellar Initial Mass Function

Cited by

• TheGaia-ESO Survey: a kinematical and dynamical study of four young open clusters