Cepheids in eclipsing binary systems

Bogumił Pilecki, Grzegorz Pietrzyński, Dariusz Graczyk, Wolfgang Gieren

We present the results of the analysis of eclipsing binary systems with pulsating components. As for now we have analyzed five systems with Classical Cepheids.  For the first time we have measured the dynamical masses (together with other physical parameters) of Cepheids with an outstanding precision of less than 1 percent. These measurements served to solve the famous Cepheid mass discrepancy problem. For two of the stars it was also possible to determine directly the value of a projection factor, a very important parameter necessary to use the Baade-Wesselink method. One system was also confirmed to consist of two first-overtone Cepheids. Unfortunately due to high eccentricity only one eclipse is visible for thisbinary system.

Proceedings of the Polish Astronomical Society, vol. 3, 31-35 (2016)

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