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Session 96 - Cepheids and Supergiant Variable Stars.
Display session, Thursday, January 16
Metropolitan Ballroom,

[96.10] Improving the Direct Distance Estimates to Nearby Galaxies Using Detached Eclipsing Binaries and Cepheids. II. New Variables in M33

D. D. Sasselov, M. Krockenberger, K. Z. Stanek (Harvard-Smithsonian CfA), J. Kaluzny (Warsaw Univ. Obs.)

During September and October 1996 we have obtained 32 nights on the FLWO 1.2-meter telescope to search for detached eclipsing binaries and Cepheids in the M33 galaxy. This is a first step in the ongoing program to improve the direct distance estimate to two important galaxies in the cosmological distance ladder -- M31 and M33. Detached eclipsing binaries provide us with the potential to determine these distances with an accuracy better than 5% and eventually to better than 1%. The massive photometry will provide us with good light curves for known and new Cepheid variables. These are essential to the parallel project to derive direct Baade-Wesselink distances to Cepheids in M31 and M33. With both Cepheids and eclipsing binaries the distance estimates will be free of any intermediate steps. As a by-product, numerous other types of variables (Novae, Luminous Blue Variables etc.) will be observed.

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Program listing for Thursday