Systems by Study

Dynamical and Observational Constraints on Additional Planets in Highly Eccentric Planetary Systems
http://fr.arxiv.org/abs/0706.1962 Robert A. Wittenmyer, Michael Endl, William D. Cochran, Harold F. Levison (Submitted on 13 Jun 2007)

''Abstract: 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, search for additional planets, and perform test particle simulations to find regions of dynamical stability. The dynamical simulations show that short-period planets could exist in the HD 45350 and 16 Cyg B systems, and we use the observational data to set tight detection limits, which rule out additional planets down to a few Neptune masses in the HD 3651, HD 45350, and 16 Cyg B systems. ''


 * HD 3651 System -
 * HD 37605 System -
 * HD 45350 System -
 * HD 80606 System -
 * HD 89744 System -
 * 16 Cygni System -