The Dynamics Of Galactic Globular Cluster

Details The Dynamics Of Galactic Globular Cluster The Dynamics Of Galactic Globular Cluster

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008iaus..252..269d&link_type=abstract

The Art of Modeling Stars in the 21st Century, Proceedings of the International Astronomical Union, IAU Symposium, Volume 252, p

Astronomy and Astrophysics

Astronomy

Astrometry, Globular Clusters: General

Scientific paper

We have used the Hubble Space Telescope (HST) to measure proper motion of the globular cluster NGC 6656 (M22) with respect to the background bulge stars and its internal velocity dispersion profile. With the space velocity of (Π, Θ, W) = (184±3, 209±14, 132±15) km s-1, we also calculate the orbit of the cluster. The central velocity dispersion in both components of the proper motion of cluster stars is 16.99 km s-1. We derive the mass-to-ration (M/L)˜1.7 which is relatively higher than the past works.

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