Southern stars of high radial velocity.
Abstract
First, it has been shown that the Stock Velocity Survey is a useful source of velocity information on 8-13th mag southern stars. The particular use has been to identify stars of very large velocity. Thackeray (1975) has tabulated those galactic objects with heliocentric radial velocities over 250 km/s; his list contains 69 objects, of which 59 are stellar. The authors have found twelve more stars. Second, the slit spectra of a sample of high-velocity stars in the Stock Survey revealed several extremely metal-weak stars. Abundance analysis for these objects would be worthwhile. Finally, among the high-velocity objects are a surprising number of late B and early A stars. In most instances, these objects appear to be spectroscopically normal, main-sequence stars, but three are definite A + G spectrum binaries. High-velocity binaries are rare.
- Publication:
-
The Astronomical Journal
- Pub Date:
- December 1984
- DOI:
- 10.1086/113701
- Bibcode:
- 1984AJ.....89.1897S
- Keywords:
-
- Astronomical Catalogs;
- Radial Velocity;
- Stellar Spectrophotometry;
- A Stars;
- Astrometry;
- K Stars;
- Main Sequence Stars;
- Metallicity;
- Velocity Measurement;
- Astronomy