Other
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006dda....37.1001m&link_type=abstract
American Astronomical Society, DDA meeting #37, #10.01; Bulletin of the American Astronomical Society, Vol. 38, p.671
Other
Scientific paper
We present the properties of the 21 multiple-planet systems that have well defined orbital parameters and minimum masses. The parameters have been updated with the latest Doppler measurements. We present two new multiple-planet systems, one having two short period planets and the other with a short period and decade-long second planet. The fraction of known planet-bearing stars that contain additional giant planets is 13%. Clear evidence of mean-motion resonances is found in 4 of 21 of the multiple-planet systems, and several other systems may also reside in resonances, requiring dynamical analysis. Apparently, migration and dynamical evolution of within planetary systems commonly results in resonance capture. The common occurrence of orbital eccentricities (e > 0.1) may also stem from planet-planet interactions, often resulting in an ejected planet. Many stars having only one planet have Doppler measurements that hint at additional, long-period planets, providing a glimpse of the occurrence of planets beyond 5 AU.
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