A linear distribution of orbits in compact planetary systems
作者： C. Migaszewski , K. Gozdziewski , M. Slonina
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摘要: We report a linear ordering of orbits in sample multiple extrasolar planetary systems with super-Earth planets. selected 20 cases, mostly discovered by the Kepler mission, hosting at least four planets within \sim 0.5 au. The semi-major axis a_n an n-th planet each system this obeys a(n) = a_1 + (n-1) \Delta a, where is innermost orbit and spacing between subsequent planets, which are specific for particular system. For instance, Kepler-33 five exhibits relative deviations observed linearly predicted axes only few percent. At half fulfill law similar accuracy. explain distribution as natural implication chains mean motion resonances emerge due to planet--disk interactions convergent migration early stages their evolution.
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