SIMBAD references

2013ApJ...774L..12S - Astrophys. J., 774, L12 (2013/September-1)

A lack of short-period multiplanet systems with close-proximity pairs and the curious case of Kepler-42.


Abstract (from CDS):

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 P ≡ P2/P1 ≳ 2.3(P1/day)–2/3. 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.

Abstract Copyright:

Journal keyword(s): celestial mechanics - methods: data analysis - methods: statistical - planets and satellites: formation

VizieR on-line data: <Available at CDS (J/ApJ/774/L12): table1.dat>

Simbad objects: 469

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