# Dynamical and Observational Constraints on Additional Planets in Highly Eccentric Planetary Systems

@article{Wittenmyer2007DynamicalAO,
title={Dynamical and Observational Constraints on Additional Planets in Highly Eccentric Planetary Systems},
author={Robert A. Wittenmyer and Michael Endl and William D. Cochran and Harold F. Levison},
journal={The Astronomical Journal},
year={2007},
volume={134},
pages={1276-1284}
}
Long time coverage and high radial velocity precision have allowed for the discovery of additional objects in known planetary systems. Many of the extrasolar planets detected have highly eccentric orbits, which raises the question of how likely those systems are to host additional planets. We investigate six systems which contain a very eccentric (e > 0.6) planet: HD 3651, HD 37605, HD 45350, HD 80606, HD 89744, and 16 Cyg B. We present updated radial velocity observations and orbital solutions…

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