Cool dwarfs stars from the Torino Observatory Parallax Program
Abstract
Aims: We investigate and parameterize high proper motion red stars in the Torino Observatory Parallax Program.
Methods: Observations of 27 objects were made over the period 1994-2001 on the 1.05 m Torino telescope. The trigonometric parallaxes and proper motions were determined using standard techniques.
Results: We determine parallaxes and proper motions, and by comparison to models we infer masses, ages, and metallicities. Of the 27 objects, 22 are within 25 pc and 4 appear to be subdwarfs. There are published parallaxes for 18 objects, and all but 4 agree to within 2σ. The discrepancies are discussed.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- May 2010
- DOI:
- 10.1051/0004-6361/200913424
- arXiv:
- arXiv:1003.1465
- Bibcode:
- 2010A&A...514A..84S
- Keywords:
-
- astrometry;
- stars: low-mass;
- stars: fundamental parameters;
- stars: distances;
- Hertzsprung-Russell (HR) and C-M diagrams;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 8 pages 6 figures accepted by AA