Space motions of distant red giants: the disk-halo overlap

Details Space motions of distant red giants: the disk-halo overlap Space motions of distant red giants: the disk-halo overlap

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...280..131f&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 280, no. 1, p. 131-135

Astronomy and Astrophysics

Astrophysics

2

Chemical Properties, Disks (Shapes), Galactic Halos, Kinematics, Late Stars, Milky Way Galaxy, Red Giant Stars, Velocity Distribution, Abundance, Cosmology, Galactic Evolution, Hydrogen, Iron, Rotation

Scientific paper

We describe a measurement of space velocities for a sample of distant late-type giants, selected to examine the chemical and kinematical properties of the transition between the Galaxy's disk and halo. We derive the three components of the velocity ellipsoid and the galactocentric rotational velocity of the stars as a function of abundance. We confirm the results of Norris et al. (1985) and Morrison et al. (1990), that there are metal weak stars ((Fe/H) less than -1) with 'disk' kinematics. The data support the picture that the disk and halo are very much separate kinematic structures (although overlapping in their abundance distributions) rather than there being a smooth transition from one to the other. We discuss briefly the implications for the formation of the Galaxy.

Affiliated with

Also associated with

No associations

Rating

Space motions of distant red giants: the disk-halo overlap 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 Space motions of distant red giants: the disk-halo overlap, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Space motions of distant red giants: the disk-halo overlap will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-777439