Spectroscopic orbits of symbiotic stars - Preliminary results

Details Spectroscopic orbits of symbiotic stars - Preliminary results Spectroscopic orbits of symbiotic stars - Preliminary results

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....91.1400g&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 91, June 1986, p. 1400-1415.

Astronomy and Astrophysics

Astronomy

78

Radial Velocity, Stellar Motions, Stellar Orbits, Stellar Spectrophotometry, Symbiotic Stars, Absorption Spectra, Emission Spectra, Giant Stars, Iron, Line Spectra, M Stars, Mass Ratios, Orbital Elements, Periodic Variations, Roche Limit

Scientific paper

Preliminary results of a systematic search for radial-velocity variations due to orbital motion in symbiotic stars are reported. Seventeen symbiotics were observed and radial-velocity variations in the M-giant primary were observed in nine. In eight of the stars, the photospheric absorption lines of the M giant could not be seen clearly and radial velocities could not be measured. The observed radial-velocity curves are commensurate with those expected from a group of binaries having random sin i and ≡20 km s-1 orbital velocities. The curves suggest orbital periods for seven stars. Knowledge of the orbits allows identification of those symbiotics that are close to filling their Roche lobes.

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