Analyses of the Light Curves of the Eclipsing Binaries in the Globular Cluster M71

Details Analyses of the Light Curves of the Eclipsing Binaries in the Globular Cluster M71 Analyses of the Light Curves of the Eclipsing Binaries in the Globular Cluster M71

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...481..782m&link_type=abstract

Astrophysical Journal v.481, p.782

Astronomy and Astrophysics

Astronomy

4

Stars: Binaries: Eclipsing, Stars: Blue Stragglers, Galaxy: Globular Clusters: Individual Messier Number: M71, Stars: Fundamental Parameters

Scientific paper

The two-color light curves of five eclipsing binary systems in the field of the globular cluster M71 that were obtained by Yan & Mateo were modeled using the University of Calgary's latest enhanced versions of the Wilson-Devinney light-curve modeling code. On the basis of modeling with assumed system masses based on color-magnitude diagram (CMD) positions, four of the binaries were found to be probable members of M71. The fifth (V3) is less likely to be simply on the basis of its position in the CMD, but it is, formally, a member on the basis of derived distance. Three of the probable members are contact binaries with contact parameters ranging from 0.06 to 0.27. The fourth probable member (V4) is a detached or semidetached Algol-type system, the detached model being the more likely. The absolute parameters of all the systems were calculated, and the individual components were placed on the M71 CMD. The possibility of mass exchange is discussed for V4, and it is concluded that mass exchange has probably not occurred, but radial velocity information is needed for confirmation.

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