TRAPPIST-1: Dynamical analysis of the transit-timing variations and origin of the resonant chain

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Table 2

Main periods (in years) found by frequency analysis in the TTVs and the resonant angles.

TTV periods (yr)	θ_bc	θ_cd	θ_de	θ_ef	θ_fg	θ_gh	θ_bcd	θ_cde	θ_def	θ_efg	θ_fgh
0.032	✓	✓
0.09			✓	✓	✓	✓
0.45
0.68
1.3

3.3							✓	✓			✓
5.1								✓	✓	✓	✓
12.3							✓	✓	✓	✓
31.5							✓		✓	✓	✓

Notes. Ticks indicate that the period is present in the signal with a large amplitude. Circled bold ticks highlight the periodic component with the largest amplitude.

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