A Study of the Kinematics of Stars at the North Galactic Pole

Details A Study of the Kinematics of Stars at the North Galactic Pole A Study of the Kinematics of Stars at the North Galactic Pole

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...201.5009p&link_type=abstract

American Astronomical Society, 201st AAS Meeting, #50.09; Bulletin of the American Astronomical Society, Vol. 34, p.1188

Astronomy and Astrophysics

Astronomy

Scientific paper

Following on the study of the kinematics of F-K stars in a deep (B ~22.5) North Galactic Pole survey by Majewski (1992), we have produced a complimentary study of K-M stars in the same field. The data include deep BVI CCD photometry combined with unpublished proper motion data from Majewski's original survey. For late-type stars, the Reduced Proper Motion Diagram is a useful discriminant between dwarfs and giants, and we compute photometric parallaxes based on the appropriate luminosity class for each star. The quartiles of the distance distribution of our complete, magnitude-limited sample are 0.6, 1.4, and 3.5 kpc. U and V velocities are determined directly from the proper motions for all stars, while W velocities are known only for a subset of stars for which radial velocities have been measured. Our K-M dwarf sample is particularly useful for study of the disk populations of the Galaxy. For example, we find an asymmetric drift gradient of -38 km s-1 kpc-1 out to ~4 kpc for the disk component of our sample. In our more distant subsample, we see further evidence of a retrograde moving group in the Galactic halo which may be related to the one discerned by Majewski, Munn and Hawley (1996).

Affiliated with

Also associated with

No associations

Rating

A Study of the Kinematics of Stars at the North Galactic Pole 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 A Study of the Kinematics of Stars at the North Galactic Pole, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Study of the Kinematics of Stars at the North Galactic Pole will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1890223