Physics
Scientific paper
Aug 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001noao.prop..149o&link_type=abstract
NOAO Proposal ID #2001B-0149
Physics
Scientific paper
We propose to obtain BVIJK photometry for the blue straggler S 1082 in the old open cluster M 67. This star is a multiple-component system containing one blue straggler with a mass of ~ 1.5 times the turnoff mass of M 67 and an eclipsing binary with a total mass that is more than twice the turnoff mass of M 67. It is not clear if the blue straggler is physically bound to the eclipsing binary. The primary in the binary is at least 2 magnitudes underluminous for its mass and hence may be the product of a very recent merger. To date no infrared observations are available. Owing to the unusual nature of S 1082 it is worthwile to obtain detailed infrared and additional optical light curves to (i) better constrain the properties of the eclipsing binary with the infrared light curves (ii) investigate possible evolution in the light curves; and (iii) to obtain additional eclipse timings which can be used to investigate the dynamics of the wide triple. The field around S 1082 contains many more interesting X-ray sources and binaries that are members of M 67 whose light curves can easily be obtained with the same exposures.
Orosz Jerome
van den Berg Maureen
Verbunt Frank
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