Astronomy and Astrophysics – Astronomy
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dda....39.1514v&link_type=abstract
American Astronomical Society, DDA meeting #39, #15.14
Astronomy and Astrophysics
Astronomy
Scientific paper
Secular eccentricity evolution in multiple planet systems can provide particularly valuable constraints on planet formation models. Because the inevitable uncertainties in the current orbital elements can lead to significant ambiguities in the nature of the secular evolution, relevant dynamical studies should account for the uncertainties in orbital elements. By combining radial velocity observations of selected multi-planet exosystems with Markov Chain Monte Carlo techniques, we obtain ensembles of initial conditions from which to start N-body integrations that characterize secular evolution. We find that single sets of current best-fit orbital elements yield evolutionary histories which are not necessarily representative of the systems' general behavior. Our results suggest that a re-evaluation of the dynamics of multi-planet exosystems may yield fruitful insights and/or correct previous misconceptions about their orbital evolution.
Ford Eric B.
Veras Dimitri
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