We present a search for Trojan companions to 25 transiting exoplanets. We use the technique of Ford & Gaudi 2006, in which a difference is sought between the observed transit time and the transit time that is calculated by fitting a two-body Keplerian orbit to the radial-velocity data. This technique is sensitive to the imbalance of mass at the L4/L5 points of the planet-star orbit. No companions were detected. The median 2σ upper limit is 60 Earth masses, and the most constraining limit is 2.5 Earth masses for the case of GJ 436.
@article{arxiv.0807.4570,
title = {A Search for Exotrojans in Transiting Exoplanetary systems},
author = {N. Madhusudhan and Joshua N. Winn},
journal= {arXiv preprint arXiv:0807.4570},
year = {2009}
}
Comments
To appear in Proceedings of the IAU Symposium No. 253, "Transiting Planets", May 19 - May 23, 2008, Cambridge, MA