The kinematics of halo red giants

Details The kinematics of halo red giants The kinematics of halo red giants

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....92...60c&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 92, July 1986, p. 60-71.

Physics

102

Kinematics, Radial Velocity, Red Giant Stars, Star Distribution, Astronomical Catalogs, Eccentric Orbits, Stellar Motions, Stellar Physics, Velocity Distribution

Scientific paper

The authors have obtained 337 radial velocities with typical accuracies of ± 0.7 km s-1 for 85 metal-poor field red giants, selected from the kinematically unbiased samples of Bond (1980) and Bidelman and MacConnell (1973). The multiply observed stars suggest the field halo giant binary fraction exceeds 10%. Using their own velocities and those published by others, the authors have a sample of 174 red giants with [Fe/H] ≤ -1.5. Their mean motion with respect to the local standard of rest is >V< = -206±23 km s-1, and the velocity dispersions are σR = 154±18 km s-1, σθ = 102±27 km s-1, and σφ = 107±15 km s-1. Using photometrically derived absolute magnitudes and published proper motions, the authors compute orbital eccentricities for 72 stars not already considered in a similar study of southern stars by Norris, Bessell, and Pickles (1985). They find a few (5% - 8%) stars with e < 0.4.

Affiliated with

Also associated with

No associations

Rating

The kinematics of halo red giants 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 kinematics of halo red giants, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The kinematics of halo red giants will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1654626