Highlights on eclipsing binary variables from Araucaria Project
1 Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland
2 Departamento de Astronomia, Universidad de Concepcion, Casilla 160-C, Concepción, Chile
3 Carnegie Observatories, 813 Santa Barbara Street, Pasadena, CA 91101-1292, USA
4 Laboratoire Fizeau, UNS/OCA/CNRS UMR6525, Parc Valrose, 06108 Nice Cedex 2, France
5 Copernicus Astronomical Centre, Polish Academy of Sciences, Bartycka 18, 00-716 Warsaw, Poland
a e-mail: email@example.com
Published online: 23 September 2015
The Araucaria Project, which main goal is to provide precise determination of the cosmic distance scale, has recently made a set of discoveries involving variable stars in binary systems. Among these discoveries we highlight three: 1% precise measurement of a Cepheid's dynamical mass and its projection factor, accurate determination of both stellar and orbital parameters of eclipsing binary consisting of two Cepheid variables, and discovery of new class of variable stars, mimicking RR Lyrae pulsators.
Key words: stars: Cepheids / stars: pulsation / stars: pulsation / stars: eclipsing binaries / stars: distances / stars: oscillations
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