Mathematics
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd..14e...8l&link_type=abstract
Modelling Dense Stellar Systems, 26th meeting of the IAU, Joint Discussion 14, 22-23 August 2006, Prague, Czech Republic, JD14,
Mathematics
Scientific paper
For more than 20 years we have been monitoring the velocities of stars in the old open cluster M67 using the CfA Digital Speedometers. Altogether we have accumulated 6920 exposures of 411 proper-motion member of the cluster. We now have orbital solutions for 87 spectroscopic binaries, compared to the 22 spectroscopic binaries (13 with orbital solutions) identified and analysed by Mathieu and Latham (AJ, 92, 1364, 1986). I will summarize the characteristics of this population of binaries, such as the distribution of eccentricity versus period, and the radial distribution in the cluster. I will then review the binary status of cluster members that appear in positions on the color-magnitude diagram where they are not expected according to standard single-star evolution.
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