A Survey of Proper-Motion Stars. XV. Orbital Solutions for 34 Double-lined Spectroscopic Binaries

Details A Survey of Proper-Motion Stars. XV. Orbital Solutions for 34 Double-lined Spectroscopic Binaries A Survey of Proper-Motion Stars. XV. Orbital Solutions for 34 Double-lined Spectroscopic Binaries

Aug 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aj....124.1132g&link_type=abstract

The Astronomical Journal, Volume 124, Issue 2, pp. 1132-1143.

Astronomy and Astrophysics

Astronomy

35

Stars: Binaries: Spectroscopic, Galaxy: Halo, Techniques: Radial Velocities

Scientific paper

We present orbital solutions for 34 double-lined spectroscopic binaries found in the Carney-Latham sample of 1464 stars selected for high proper motion. We use TODCOR, a two-dimensional correlation technique, to extract the velocities for the primary and secondary stars and their light ratio. For our single-order echelle spectra, obtained with the Center for Astrophysics Digital Speedometers, we find that we can reach secondaries that are as much as 2 mag fainter than their primaries. The ratio of the primary to secondary velocity residuals from the orbital fit equals approximately the secondary-to-primary light ratio, as would be expected for the photon-limited case. We use our mass and light ratios to evaluate the mass-luminosity relation for metal-poor main-sequence dwarfs in the mass range 0.55-0.8 Msolar. We assume an L~Mβ relation and find that the exponent at around 5200 Å is 7.4+/-0.6. We find this is in good agreement with the slope of the corresponding theoretical MV-M 14 Gyr isochrones from the VandenBerg & Bell models for metal-poor stars. Some of the results presented here used observations made with the Multiple Mirror Telescope, a facility operated jointly by the University of Arizona and the Smithsonian Institution.

Affiliated with

Also associated with

No associations

Rating

A Survey of Proper-Motion Stars. XV. Orbital Solutions for 34 Double-lined Spectroscopic Binaries 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 A Survey of Proper-Motion Stars. XV. Orbital Solutions for 34 Double-lined Spectroscopic Binaries, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Survey of Proper-Motion Stars. XV. Orbital Solutions for 34 Double-lined Spectroscopic Binaries will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1674742