Melotte 71 red giants radial velocities (Mermilliod+ 1997)

Details Melotte 71 red giants radial velocities (Mermilliod+ 1997) Melotte 71 red giants radial velocities (Mermilliod+ 1997)

Jan 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997ycat..33240091m&link_type=abstract

VizieR On-line Data Catalog: J/A+A/324/91. Originally published in: 1997A&A...324...91M

Physics

Clusters: Open, Stars: Giant, Radial Velocities

Scientific paper

New CORAVEL radial-velocity observations and UBV photometry of 24 red giants in the field of the intermediate-age open cluster Mel 71 are analysed for membership and duplicity. The membership of 16 stars is confirmed, one star is a possible member, and 8 spectroscopic binaries have been discovered, all amongst the cluster stars. Four of their orbits have been determined, with periods ranging from 74 to 1627 days. The mean cluster velocity is +50.14+/-0.14 (s.e.)km/s, and the binary frequency is unusually high (8/16=50%). The best isochrone fit to the observed colour-magnitude digram is obtained for logt=9.00 and Z=0.008. However, some discrepancies appear between the observed and predicted locations of the red giant clump.
(1 data file).

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