SIMBAD references

2002AJ....124.1132G - Astron. J., 124, 1132-1143 (2002/August-0)

A survey of proper-motion stars. XV. Orbital solutions for 34 double-lined spectroscopic binaries.

GOLDBERG D., MAZEH T., LATHAM D.W., STEFANIK R.P., CARNEY B.W. and LAIRD J.B.

Abstract (from CDS):

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 M. We assume an LMβ 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.

Abstract Copyright:

Journal keyword(s): Stars: Binaries: Spectroscopic - Galaxy: Halo - Techniques: Radial Velocities

Simbad objects: 34

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2021.05.09-04:55:14

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