Spectroscopic orbits for two very high velocity halo stars HD 111980 and HD 149414

Details Spectroscopic orbits for two very high velocity halo stars HD 111980 and HD 149414 Spectroscopic orbits for two very high velocity halo stars HD 111980 and HD 149414

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...110..241m&link_type=abstract

Astronomy and Astrophysics, vol. 110, no. 2, June 1982, p. 241-245. Research supported by the Swiss National Science Foundation

Astronomy and Astrophysics

Astrophysics

24

Binary Stars, Orbit Calculation, Radial Velocity, Stellar Spectra, Subdwarf Stars, Heavy Elements, Kinematics, Metallic Stars, Stellar Spectrophotometry

Scientific paper

Spectroscopic orbits for the two subdwarfs, HD 111980 and HD 149414, are computed from Coravel spectrometer data. Both their metallicities relative to the sun (Fe/H equals -1.2 and -1.4) and their mean radial velocities indicate that they are halo stars. These F and G halo stars are the first spectroscopic binaries with such extreme values of velocities and metallicities for which orbits have been determined.

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