Red giants in open clusters. XIII. Orbital elements of 156 spectroscopic binaries

Details Red giants in open clusters. XIII. Orbital elements of 156 spectroscopic binaries Red giants in open clusters. XIII. Orbital elements of 156 spectroscopic binaries

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007a%26a...473..829m&link_type=abstract

Astronomy and Astrophysics, Volume 473, Issue 3, October III 2007, pp.829-845

Astronomy and Astrophysics

Astrophysics

15

Galaxy: Open Clusters And Associations: General, Stars: Binaries: Spectroscopic, Techniques: Radial Velocities, Stars: Late-Type

Scientific paper

Context: The identification and characterisation of spectroscopic binaries with red-giant primaries in open clusters is important for a proper understanding of the colour-magnitude diagrams of the clusters. Moreover, the orbital eccentricities and axial rotations of these binaries are valuable probes into the inner structure and tidal interaction of the stars. Aims: We report on a comprehensive, long-term monitoring programme aiming to improve our knowledge of such binary systems. Methods: The radial velocities of 1309 red giants in 187 open clusters in the whole sky have been monitored with the Coravel and CfA spectrometers for 20 years, with a typical accuracy of 0.4 km s-1 per observation. Results: In total, 289 spectroscopic binaries were detected in the sample. We present first orbits for 67 systems and improved elements for another 64 previously published orbits, based on additional observations. For completeness, 25 published orbits are listed as well. The orbits are based on a total of 4039 observations, an average of 26 per system. Orbital periods range from 41.5 to 14 722 days (40 yrs), eccentricities from 0.00 to 0.81. The remaining 133 systems have too long periods, too few observations, and/or inadequate phase coverage for an orbit determination at this time. Conclusions: This paper provides a dramatic increase in the body of homogeneous orbital data available for red-giant spectroscopic binaries in open clusters. It will form the basis for a comprehensive discussion of membership, kinematics, and stellar and tidal evolution in the parent clusters.
Based on observations collected with the Danish 1.54-m telescope at the European Southern Observatory, La Silla, Chile and at the Haute-Provence Observatory (France). Full Table [see full text] and the catalogue of orbital elements are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/473/829

Affiliated with

Also associated with

No associations

Rating

Red giants in open clusters. XIII. Orbital elements of 156 spectroscopic binaries does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Red giants in open clusters. XIII. Orbital elements of 156 spectroscopic binaries, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Red giants in open clusters. XIII. Orbital elements of 156 spectroscopic binaries will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-823187