Spectroscopic orbits of binary stars determined with the CORAVEL II-HD 195987 radial velocity photoelectric spectrometer

Details Spectroscopic orbits of binary stars determined with the CORAVEL II-HD 195987 radial velocity photoelectric spectrometer Spectroscopic orbits of binary stars determined with the CORAVEL II-HD 195987 radial velocity photoelectric spectrometer

Dec 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26as...42..331i&link_type=abstract

Astronomy and Astrophysics Supplement Series, vol. 42, Dec. 1980, p. 331-334. In French.

Astronomy and Astrophysics

Astrophysics

11

Astronomical Spectroscopy, Binary Stars, Orbital Elements, Stellar Motions, Stellar Spectrophotometry, Electrophotometry, Radial Velocity, Spectrometers

Scientific paper

A spectroscopic orbit has been determined for the star HD 195987. The radial velocities were obtained with the Coravel radial velocity spectrometer. Calculations, taking into account previous spectroscopic radial velocities, made with - several series of observations at different epochs, give us the period with good accuracy:
P = 57.3210 ± 0.0014 days.
The other orbital elements were determined using only 60 Covarel measurements. We obtain the following definite elements:
K = 28.8 ± 0.12 km s-1 V0 = - 5.63 j 0.075 km s-1 e = 0.305 ± 0.003 ω = 356°8 ± 0°7 T0 = 2 443 328.6 ± 0.1 JD TN = 2 443 328,89 ± 0.04 JD α sin i = 21 582 000 ± 11 400 km f(m) = 0.122 ± 0.002 Msun
The spectral type of the primary is G9V. Considerations concerning spectral type suggest a dwarf of type K5V for the secondary. An eclipse being possible. The separation of the components is in the neighborhood of 71 Rsun.

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