Space Velocities of 14 Globular Clusters (original) (raw)

NASA/ADS

Abstract

Relative proper motions for 14 globular clusters are converted to absolute proper motions using a new procedure that uses results from the Lick program of proper motions relative to galaxies. These absolute proper motions are then used to derive space velocities for the clusters. The space velocities generally confirm the picture of disk and halo populations of globulars that had been deduced from radial velocity data alone, but there are a few surprises; most notably M4 and M28 are moderately metal-poor but in orbits confined to the disk. We also find a very high space velocity for M5.

Publication:

The Astronomical Journal

Pub Date:

January 1993

DOI:

10.1086/116417

Bibcode:

1993AJ....105..168C

Keywords:

• Galactic Evolution;
• Galactic Halos;
• Globular Clusters;
• Stellar Motions;
• Chemical Composition;
• Milky Way Galaxy;
• Radial Velocity;
• Astronomy;
• GLOBULAR CLUSTERS: GENERAL;
• GLOBULAR CLUSTERS: INDIVIDUAL: M4;
• GLOBULAR CLUSTERS: INDIVIDUAL: M5;
• GLOBULAR CLUSTERS: INDIVIDUAL: M28