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Tidal Circularization Among the Close Binaries in M67

Published online by Cambridge University Press:  07 August 2017

David W. Latham ,
Robert D. Mathieu ,
Alejandra A. E. Milone  and
Robert J. Davis
David W. Latham
Affiliation:
Harvard-Smithsonian Center for Astrophysics 60 Garden Street, Cambridge, Massachusetts 02138, U.S.A.
Robert D. Mathieu
Affiliation:
Department of Astronomy, University of Wisconsin 475 Charter Street, Madison, Wisconsin 53706, U.S.A.
Alejandra A. E. Milone
Affiliation:
Harvard-Smithsonian Center for Astrophysics and Córdoba Observatory, National University of Córdoba Laprida 854, 5000 Córdoba, Argentina
Robert J. Davis
Affiliation:
Harvard-Smithsonian Center for Astrophysics 60 Garden Street, Cambridge, Massachusetts 02138, U.S.A.

Extract

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In 1971 Roger Griffin and Jim Gunn began monitoring the radial velocities of most of the members brighter than the main-sequence turnoff in the old open cluster M67, primarily using the 200-inch Hale Telescope. In 1982 the torch was passed to Dave Latham and Bob Mathieu, who began monitoring many of the same stars with the 1.5-meter Tillinghast Reflector and the Multiple-Mirror Telescope on Mt. Hopkins. We have successively combined these two sets of data, plus some additional CORAVEL velocities kindly provided by Michel Mayor, to obtain 20 years of time coverage (e.g. Mathieu et al. 1986). Among the stars brighter than magnitude V = 12.7 we have already published orbits for 22 spectroscopic binaries (Mathieu et al. 1990). At Mt. Hopkins an extension of this survey to many of the cluster members down to magnitude V = 15.5 has already yielded thirteen additional orbital solutions, with the promise of many more to come.

Type
Oral and Contributed Papers
Information
Symposium - International Astronomical Union , Volume 151: Evolutionary Processes in Interacting Binary Stars , 1992 , pp. 471 - 472
Copyright
Copyright © Kluwer 1992 

References

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