Eight Planets in Four Multi-planet Systems via Transit Timing Variations in 1350 Days
Abstract
Analysis of the transit timing variations (TTVs) of candidate pairs near mean-motion resonances (MMRs) is an effective method to confirm planets. Hitherto, 68 planets in 34 multi-planet systems have been confirmed via TTVs. We analyze the TTVs of all candidates from the most recent Kepler data with a time span of upto about 1350 days (Q0-Q15). The anti-correlations of TTV signals and the mass upper limits of candidate pairs in the same system are calculated using an improved method suitable for long-period TTVs. If the false alarm probability of a candidate pair is less than 10-3 and the mass upper limit for each candidate is less than 13 M J, we confirm them as planets in the same system. Finally, eight planets in four multi-planet systems are confirmed via analysis of their TTVs. All of the four planet pairs are near first-order MMRs, including KOI-2672 near 2:1 MMR and KOI-1236, KOI-1563, and KOI-2038 near 3:2 MMR. Four planets have relatively long orbital periods (>35 days). KOI-2672.01 has an orbital period of 88.51658 days and a fit mass of 17 M ⊕. To date, it is the longest-period planet confirmed near a first-order MMR via TTVs.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- December 2013
- DOI:
- 10.1088/0004-637X/778/2/110
- arXiv:
- arXiv:1308.0996
- Bibcode:
- 2013ApJ...778..110Y
- Keywords:
-
- methods: data analysis;
- planets and satellites: detection;
- stars: individual: KID 6677841/KOI-1236 KID 5219234/KOI-1563 KID 8950568/KOI-2038 KID 11253827;
- techniques: photometric;
- Astrophysics - Earth and Planetary Astrophysics
- E-Print:
- 34 pages, 12 figures, 3 tables