Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...271..125b&link_type=abstract
Astronomy and Astrophysics, Vol.271, NO. 1/APRI, P. 125, 1993
Astronomy and Astrophysics
Astrophysics
39
Stars: Binaries: Spectroscopic, Stars: Giant, Stars: Barium
Scientific paper
We present a catalogue of red giant spectroscopic binaries obtained from an extensive survey of the literature and containing 213 systems. We perform a statistical analysis of the orbital elements (period, eccentricity, mass function) characterizing those systems. From the eccentricity-period diagram, we deduce a circularisation cut-off period around 70 days and we find an eccentricity-period correlation that seemingly does not result from an observational bias. With the aid of two complementary methods, we derive the mass ratio distribution. A comparison with the observed mass function distribution shows a reasonably good agreement in the case of a uniform mass ratio distribution function and a single-valued giant mass of 1.5 Msun. We finally present a comparison with a sample of barium stars.
Boffin Henri. M. J.
Cerf Nicolas
Paulus Gerhard G.
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