Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26as...76..459i&link_type=abstract
Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 76, no. 3, Dec. 1988, p. 459-468. In French.
Astronomy and Astrophysics
Astrophysics
6
Binary Stars, Radial Velocity, Stellar Models, Stellar Orbits, Stellar Spectra, Triple Stars, Astronomical Spectroscopy, Periodic Variations, Stellar Mass
Scientific paper
The authors has obtained 179 photoelectric radial velocities from the Coravel spectrometer, for the bright component of the visual binary HD 105287 = ADS 8428 and 26 radial velocities for the faintest. The brightest component of the pair was found to be a triple spectroscopic binary of which only two components are visible. On the 3.87 days period main motion, is superposed a second eccentric motion with a 6.5 years period due to a third invisible body. A model is adopted where the two main masses are 0.91 and 0.67 M_sun; and a minimum of 0.37 M_sun; for the third body. With this model a maximum of 0.19 arc second for the separation between the third star and the other two are deduced. The radial velocity of the faint visual component was found constant.
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