Dynamical mass estimates in M13

Conference · Tue Sep 01 00:00:00 EDT 1992

OSTI ID:10174110

Leonard, P J.T. ^[1]; Richer, H B; Fahlman, G G ^[2]

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1. Los Alamos National Lab., NM (United States)
2. British Columbia Univ., Vancouver, BC (Canada)

We have used the proper motion data of Cudworth Monet to make mass estimates in the globular cluster M13 by solving the spherical Jeans equation. We find a mass inside a spherical shell centered on the cluster with a radius corresponding to 390 arcsec on the sky of 5.5 or 7.6 {times} 10{sup 5} M{circle_dot}, depending on the adopted cluster distance. This large dynamical mass estimate together with the observed fact that the mass function of M13 is rising steeply at the low-mass end suggest that much of the cluster mass may be in the form of low-mass stars and brown dwarfs.

• Research Organization: Los Alamos National Lab., NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 10174110
• Report Number(s): LA-UR-92-2495; CONF-9207116-1; ON: DE92018946
• Resource Relation: Conference: Conference on dynamics of globular clusters,Berkeley, CA (United States),15-17 Jul 1992; Other Information: PBD: [1992]
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
STAR CLUSTERS
MASS
PROPER MOTION
GRAVITATION
661300
OTHER ASPECTS OF PHYSICAL SCIENCE