TYC 1031 01262 1: The First Known Galactic Eclipsing Binary with a Type II Cepheid Component

Details TYC 1031 01262 1: The First Known Galactic Eclipsing Binary with a Type II Cepheid Component TYC 1031 01262 1: The First Known Galactic Eclipsing Binary with a Type II Cepheid Component

2007-05-04

arxiv.org/abs/0705.0605v2

Mon.Not.Roy.Astron.Soc.Lett.379:L60-L62,2007

Astronomy and Astrophysics

Astrophysics

3 pages, 3 figures, accepted to MNRAS Letters

Scientific paper

10.1111/j.1745-3933.2007.00335.x

We present the discovery and CCD observations of the first eclipsing binary with a Type II Cepheid component in our Galaxy. The pulsation and orbital periods are found to be 4.1523 and 51.38 days, respectively, i.e. this variable is a system with the shortest orbital period among known Cepheid binaries. Pulsations dominate the brightness variations. The eclipses are assumed to be partial. The EB-subtype eclipsing light curve permits to believe that the binary's components are non-spherical.

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