Astron. Astrophys. 346, 532-536 (1999)

Ten CORAVEL spectroscopic binary orbits of evolved stars ^*

J.R. DeMedeiros ¹ and S. Udry <sup>2

1</sup> Departamento de Física, Universidade Federal do Rio Grande do Norte Campus Universitário, 59072-970, Natal, RN, Brasil
² Observatoire de Genève, Chemin des Maillettes 51, CH-1290 Sauverny, Switzerland

Received 20 November 1998 / Accepted 24 February 1999

Abstract

On the basis of CORAVEL observations, we present orbital parameters for 10 spectroscopic-binary systems including an evolved star, namely HD  13530, HD  28591, HD  47415, HD  78414, HD  123999, HD  153751, HD  174881, HD  179094, HD  212280 and HD  217188. The most significant result is related to HD  13530, for which we have found an orbital period of 1575.481.63 days and an eccentricity of 0.8815. Such an eccentricity value is the largest one known up to date for a single-lined spectroscopic binary with a giant component.

The other spectroscopic orbits described in this paper principally confirm with independent data previously obtained orbital solutions except HD  179094 for which the double-lined status was still unknown.

Key words: stars: supergiants stars: binaries: spectroscopic stars: late-type

* Based on observations collected at the Haute-Provence Observatory, Saint-Michel, France and at ESO, La Silla, Chile.

SIMBAD Objects

Contents

• 1. Introduction
• 2. The observations
• 3. Radial-velocity curves and orbital parameters
  • 3.1. HD  13530
  • 3.2. HD  28591
  • 3.3. HD  47415
  • 3.4. HD  78418
  • 3.5. HD  123999
  • 3.6. HD  153751
  • 3.7. HD  174881
  • 3.8. HD  179094
  • 3.9. HD  212280
  • 3.10. HD  217188
• Acknowledgements
• References

© European Southern Observatory (ESO) 1999

Online publication: May 21, 1999
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