Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5487711 | New Astronomy | 2018 | 6 Pages |
Abstract
We present our results of a long-term monitoring of cataclysmic variable stars (CVs). About 40 new eclipses were measured for the three southern SU UMa-type eclipsing CVs: V2051Â Oph, OYÂ Car and ZÂ Cha. Based on the current OâC diagrams we confirmed earlier findings that V2051Â Oph and OYÂ Car present cyclic changes of their orbital periods lasting 25 and 29 years, respectively. In case of ZÂ Cha we propose the light-time effect caused probably by a presence of the third component orbiting the eclipsing CV with the period of 43.5 years. The minimal mass of this companion results about 15Â MJup.
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Authors
L. PilarÄÃk, M. Wolf, P. Zasche, J. VraÅ¡til,