A survey of proper motion stars. XI - Orbits for the second 40 spectroscopic binaries

Details A survey of proper motion stars. XI - Orbits for the second 40 spectroscopic binaries A survey of proper motion stars. XI - Orbits for the second 40 spectroscopic binaries

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....104..774l&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 104, no. 2, Aug. 1992, p. 774-795. Research supported by USIBSF and Smithsonian Inst

Astronomy and Astrophysics

Astronomy

59

Binary Stars, Sky Surveys (Astronomy), Stellar Motions, Stellar Orbits, Metallicity, Open Clusters, Radial Velocity, Stellar Mass

Scientific paper

Orbital solutions and spectroscopic metallicities for a second set of 40 spectroscopic binaries found in an extended version of the Carney and Latham survey of proper-motion stars are reported. To investigate the distribution of orbital eccentricity versus period for a pure sample of halo binaries, only those systems more metal poor than m/H = -1.6 are selected. The transition between circular and eccentric orbits is found to occur at a period of about 19 d. This supports the interpretation that tidal circularization has been more important on the main sequence than during the premain-sequence stage for the sample of old binaries in the halo.

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