Ellipsoidal Variability in the OGLE Planetary Transit Candidates

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  • 10 February 2003
Abstract
We analyze the photometry of 121 OGLE stars with periodic transit events for the presence of ellipsoidal light variations, which indicate the presence of massive companions. We find that over 50% of objects may have stellar companions, mostly among the short period systems. In our Table 1 stars with no measurable ellipsoidal variability are marked as the prime candidates for planetary searches. There is a prospect of improving the analysis, and the systems with smaller ellipsoidal variability will be identified, when the correlations in the OGLE photometry are corrected for in the future, thereby providing a cleaner list of systems with possible planets.

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