Journal
ASTROPHYSICAL JOURNAL
Volume 591, Issue 1, Pages L57-L60Publisher
UNIV CHICAGO PRESS
DOI: 10.1086/377038
Keywords
celestial mechanics; methods : n-body simulations; planetary systems; stars : individual (HD 12661, HD 37124, HD 82943)
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We investigated the apsidal motion for the multiplanet systems. In the simulations, we found that the two planets of HD 37124, HD 12661, 47 UMa, and HD 82943 separately undergo apsidal alignment or antialignment. However, the companions of GJ 876 and v And are in apsidal lock only about 0degrees. Moreover, we obtained the criteria with Laplace-Lagrange secular theory to discern whether a pair of planets for a certain system are in libration or circulation.
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