Space velocities of 14 globular clusters

Details Space velocities of 14 globular clusters Space velocities of 14 globular clusters

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....105..168c&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 105, no. 1, p. 168-172.

Astronomy and Astrophysics

Astronomy

91

Galactic Evolution, Galactic Halos, Globular Clusters, Stellar Motions, Chemical Composition, Milky Way Galaxy, Radial Velocity

Scientific paper

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.

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