High-proper-motion stars. I - Space motions of four extreme subdwarf M stars

Details High-proper-motion stars. I - Space motions of four extreme subdwarf M stars High-proper-motion stars. I - Space motions of four extreme subdwarf M stars

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....95.1251d&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 95, April 1988, p. 1251-1255. NSERC-supported research.

Physics

Optics

11

M Stars, Radial Velocity, Stellar Motions, Stellar Orbits, Subdwarf Stars, Cassegrain Optics, Stellar Spectra, Stellar Spectrophotometry

Scientific paper

Radial velocities and space motions are presented for G7-17, LHS 453, LHS 489, and LHS 3382, cool, extremely metal-poor subdwarfs. For G7-17 and LHS 489, trigonometric parallaxes are available; for the others, very conservative photometric parallaxes were adopted. The halo color-luminosity relation from which these were derived is such that these objects are as much as 3 mag fainter than old-disk stars of the same (R-I)K. All of them appear to be bound to the Galaxy, although the orbit of LHS 3382 verges on chaotic.

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