TY - GEN
T1 - A survey of multiple planet systems
AU - Wright, J. T.
PY - 2010
Y1 - 2010
N2 - To date, over 30 multiple exoplanet systems are known, and 28% of stars with planets show significant evidence of a second companion. I briefly review these 30 systems individually, broadly grouping them into five categories: 1) systems with 3 or more giant (M sin i > 0.2 MJup) planets, 2) systems with two giant planets in mean motion resonance (MMR), 3) systems with two giant planets not in MMR but whose dynamical evolution is affected by planet-planet interactions, 4) highly hierarchical systems, having two giant planets with very large period ratios (>30:1), and 5) systems of "Super-Earths", containing only planets with (M sin i < 20 M⊕). It now appears that eccentricities are not markedly higher among planets in known multiple planet systems, and that planets with M sin i < 1 Mjup have lower eccentricities than more massive planets. The distribution of semimajor axes for planets in multi-planet systems does not show the 3-day pile-up or the 1 AU "jump" of the apparently-single planet distribution.
AB - To date, over 30 multiple exoplanet systems are known, and 28% of stars with planets show significant evidence of a second companion. I briefly review these 30 systems individually, broadly grouping them into five categories: 1) systems with 3 or more giant (M sin i > 0.2 MJup) planets, 2) systems with two giant planets in mean motion resonance (MMR), 3) systems with two giant planets not in MMR but whose dynamical evolution is affected by planet-planet interactions, 4) highly hierarchical systems, having two giant planets with very large period ratios (>30:1), and 5) systems of "Super-Earths", containing only planets with (M sin i < 20 M⊕). It now appears that eccentricities are not markedly higher among planets in known multiple planet systems, and that planets with M sin i < 1 Mjup have lower eccentricities than more massive planets. The distribution of semimajor axes for planets in multi-planet systems does not show the 3-day pile-up or the 1 AU "jump" of the apparently-single planet distribution.
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U2 - 10.1051/eas/1042001
DO - 10.1051/eas/1042001
M3 - Conference contribution
AN - SCOPUS:78751653158
SN - 9782759804856
T3 - EAS Publications Series
SP - 3
EP - 17
BT - Extrasolar Planets in Multi-Body Systems
T2 - International Conference Eztrasolar Planets in Multi-Body Systems: Theory and Observations
Y2 - 25 August 2008 through 29 August 2008
ER -