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Title:
Trigonometric Parallaxes and the HR Diagram at the Bottom of the Main Sequence
Authors:
Tinney, C. G.; Reid, I. N.; Gizis, J.; Mould, J. R.
Publication:
Astronomical Journal v.110, p.3014 (AJ Homepage)
Publication Date:
12/1995
Origin:
AJ; KNUDSEN
AJ/ApJ Keywords:
STARS: KINEMATICS AND DYNAMICS, ASTROMETRY, STARS: LOW-MASS
DOI:
10.1086/117743
Bibliographic Code:
1995AJ....110.3014T

Abstract

The final results of a parallax program carried out with the 1.5 m telescope on Palomar Mountain are presented. Astrometry has been obtained for 34 very low-mass (VLM) stars, one white dwarf, and a serendipitously discovered proper motion star. Sixteen of these stars have new (or improved) parallaxes and proper motions, and a further eighteen have proper motions alone. Common proper motions have also been determined for two VLM binary systems; GD l65AB and TVLM 5l3-42404AB. The latest atmospheric and interior models for low-mass stars are combined to produce isochrones in the observational MK:I-K plane. Remarkable agreement is seen between both the solar metallicity and low metallicity models, and the observed low-mass sequences.

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