2003/02/28 by E. Sirko, B. Paczynski, B. Paczyński · 2 citations
Physics and Astronomy · Social Sciences · #Astronomy and Astrophysical Research #Educational Leadership and Practices #Ellipsoid #Ephemeris #Light curve #Photometry (optics) #Planetary system #Stars #Starspot #Stellar, planetary, and galactic studies #Transit (satellite) #astro-ph
paper · pdf · doi:10.1086/375735
published as Astrophys.J. 592 (2003) 1217-1224 · 22 pages, 9 figures, discussion enhanced, accepted by ApJ
arxiv created 2003/04/07 · openalex publication_date 2003/07/31 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We analyze the photometry of 117 OGLE stars with periodic transit events for the presence of ellipsoidal light variations, which indicate the presence of massive companions. We find that ~50% of objects may have stellar companions, mostly among the short-period systems. In our Table 1 we identify a coefficient of ellipsoidal variability for each star, a c 2 , which can be used to select 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.