Contribution to the study of F, G, K, and M type binaries. III - Orbital elements of the long-period spectroscopic binaries, HD 102928 and HD 145206

Details Contribution to the study of F, G, K, and M type binaries. III - Orbital elements of the long-period spectroscopic binaries, HD 102928 and HD 145206 Contribution to the study of F, G, K, and M type binaries. III - Orbital elements of the long-period spectroscopic binaries, HD 102928 and HD 145206

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...144..403g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 144, no. 2, March 1985, p. 403-407. In French.

Astronomy and Astrophysics

Astrophysics

6

Astrometry, Binary Stars, F Stars, G Stars, K Stars, Orbital Elements, Stellar Motions, Radial Velocity, Stellar Mass

Scientific paper

The spectroscopic binaries HD 102928 and HD 145206 were observed at the Observatoire de Haute-Provence in order to determine their spectrographic orbits. For HD 102928 we obtained the following orbital elements: P = 486.7 d; T=2,442,352.7JD; ω=125°.1; e=0.309; K=13.92km s-1; V0=13.43km s-1; asini=88.6 × 106km; f(m)=0.1l7solar mass, and for HD145206: P=2084.8d; T=2.442,980.9JD; ω =2°.1; e=0.553; K=ll.54km s-1; V0 = -47.69km s-1; asini=275.7 × 106km; f(m)=0.193 solar mass. These two binaries are wide spectroscopic pairs and HD 145206 should be candidate for Speckle Interferornetry resolution using a large telescope. We show that the interferometric companion found by McAlister et al. (1983) at 0".170 of HD 102928 is not the spectroscopic secondary but, probably, a third body in the system.

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