The Global Kinematics of the Globular Cluster M15

Details The Global Kinematics of the Globular Cluster M15 The Global Kinematics of the Globular Cluster M15

1997-11-06

arxiv.org/abs/astro-ph/9711059v1

Astronomy and Astrophysics

Astrophysics

32 pages, LaTeX, includes 13 eps figures, 5 tables are in external tex files, to appear in Feb 1998 AJ

Scientific paper

10.1086/300231

We present velocities for 230 stars in the outer parts of the globular cluster M15 measured with the Hydra multi-object spectrograph on the WIYN telescope. A new Bayesian technique is used for analyzing the data. The mean velocity of the cluster is -106.9+/- 0.3 km/s. Rotation with an amplitude of 1.5+/- 0.4 km/s and a position angle of 125+/-19 degrees is observed and the model including rotation is marginally favored over one without rotation. The velocity dispersion decreases from the center out to about 7' and then appears to increase slightly. This behavior is strikingly different from the continued decline of velocity dispersion with increasing radius that is expected in an isolated cluster. We interpret this as an indication of heating of the outer part of M15 by the Galactic tidal field.

Affiliated with

Also associated with

No associations

Rating

The Global Kinematics of the Globular Cluster M15 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Global Kinematics of the Globular Cluster M15, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Global Kinematics of the Globular Cluster M15 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-610267