Multiple-Exoplanet Systems

Details Multiple-Exoplanet Systems Multiple-Exoplanet Systems

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dps....40.0401w&link_type=abstract

American Astronomical Society, DPS meeting #40, #4.01; Bulletin of the American Astronomical Society, Vol. 40, p.391

Astronomy and Astrophysics

Astronomy

Scientific paper

Today there at least 27 well-characterized multiple exoplanet systems, and although that composes only 15% of the known planet-bearing stars, residual radial velocity trends and periodicities suggest that planet multiplicity is probably quite common, with at least 1 in 4 planetary systems hosting multiple planets. The continuing detection of ever-smaller "super-Earths" and long-period planets continues to enlarge the sample. I will discuss some of the opportunities clues multiple-planet systems offer to study the nature of planet formation and dynamical evolution. For instance, the orbital distance and eccentricity distributions of apparently single planets and those in multiple-planet systems appear inconsistent, offering a clue into the origins of eccentricities and constraints on planetary migration theories.

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