Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26as...91..265g&link_type=abstract
Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 91, no. 2, Dec. 1991, p. 265-272. In French.
Astronomy and Astrophysics
Astrophysics
5
A Stars, Astronomical Spectroscopy, Binary Stars, Radial Velocity, Stellar Spectra, Orbital Elements, Spectrum Analysis, Stellar Orbits
Scientific paper
Results of observations of HD 83270 - 1, listed as a star with composite spectra by Hynek (1938), are presented, and the radial velocity variations are interpreted in terms of a spectroscopic triple system. The orbital elements for the short- and long-period systems are presented. The components of the close system are found to have a separation near 20 solar radii and the third body gravitates around this system at a distance of about 500 solar radii. The primary star of the triple system is an Am star; the classification A2, F3, F7 from the K line, the hydrogen lines, and the metallic lines, respectively, is proposed. The present estimates of the mass of the third body yield a minimum value of one solar mass.
Carquillat Jean-Michel
Ginestet Nicole
Pedoussaut A.
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