Abstract
Many Kepler multiplanet systems have planet pairs near low-order, mean-motion resonances. In addition, many Kepler multiplanet systems have planets with orbital periods less than a few days. With the exception of Kepler-42, however, there are no examples of systems with both short orbital periods and nearby companion planets while our statistical analysis predicts ~17 such pairs. For orbital periods of the inner planet that are less than three days, the minimum period ratio of adjacent planet pairs follows the rough constraint . This absence is not due to a lack of planets with short orbital periods. We also show a statistically significant excess of small, single-candidate systems with orbital periods below three days over the number of multiple candidate systems with similar periods—perhaps a small-planet counterpart to the hot Jupiters.
Original language | English |
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Pages (from-to) | L12 |
Journal | Astrophysical Journal Letters |
Volume | 774 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2013 |
Keywords
- celestial mechanics
- methods: data analysis
- methods: statistical
- planets and satellites: formation