Eclipsing binaries in the open cluster NGC 2243 - I. Photometry

Details Eclipsing binaries in the open cluster NGC 2243 - I. Photometry Eclipsing binaries in the open cluster NGC 2243 - I. Photometry

2006-09-14

arxiv.org/abs/astro-ph/0609379v1

Acta Astron. 56 (2006) 51

Astronomy and Astrophysics

Astrophysics

12 pages, 7 figures

Scientific paper

We obtained BV time series photometry for 12 variable stars from the field of the old open cluster NGC 2243. The sample includes 3 newly identified detached/semi-detached binaries. There are now four detached eclipsing binaries which are likely members of the cluster. Determination of the absolute parameters of the components would provide a valuable check on evolutionary models of low-mass stars. An accurate ephemeris and orbital period analysis are presented for the previously-known detached binary NV CMa. We also provide ephemerides for 7 other periodic variables. We show that 3 contact binaries are likely members of the cluster.

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