Explaining Neptune's Eccentricity
Abstract
Early migration damped Neptune's eccentricity. Here, we assume that the damped value was much smaller than the value observed today, and show that the closest flyby of 0.1 \; M star over 4.5 \; Gyr in the field, at a distance of 103 \; AU would explain the value of Neptune's eccentricity observed today.
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