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Detached Red Giant Eclipsing Binary Twins: Rosetta Stones to the Galactic Bulge

Nataf, D. M.; Gould, A.; Pinsonneault, M. H.

We identify 34 highly-probable detached, red giant eclipsing binary pairs among 315 candidates in Devor's catalog of ≈10 000 OGLE-II eclipsing binaries. We estimate that there should be at least 200 such systems in OGLE-III. We show that spectroscopic measurements of the metallicities and radial-velocity-derived masses of these systems would indep…