Detection of periodic transit timing variations in the warm sub-Saturn planet HD 332231 b

Open Access

Table 1

Transit parameters obtained for HD 332231 b.

Parameter	This paper	Dalba et al. (2020)	Knudstrup & Albrecht (2022) ^a
Transit model
Orbital inclination, i_b(^°)	$89 . 97_{- 0.34}^{+ 0.02}$ $Mathematical equation: $89.97_{-0.34}^{+0.02}$$	$89 . 68_{- 0.28}^{+ 0.22}$ $Mathematical equation: $89.68_{-0.28}^{+0.22}$$	$89 . 78_{- 0.10}^{+ 0.22}$ $Mathematical equation: $89.78_{-0.10}^{+0.22}$$
Scaled semi-major axis, a_b/R_*	$24 . 34_{- 0.37}^{+ 0.20}$ $Mathematical equation: $24.34_{-0.37}^{+0.20}$$	$24 . 21_{- 0.78}^{+ 0.62}$ $Mathematical equation: $24.21_{-0.78}^{+0.62}$$	$24 . 4_{- 0.3}^{+ 0.4}$ $Mathematical equation: $24.4_{-0.3}^{+0.4}$$
Radius ratio, R_b/R_*	$0 . 07088_{- 0.00031}^{+ 0.00039}$ $Mathematical equation: $0.07088_{-0.00031}^{+0.00039}$$	$0 . 06976_{- 0.00039}^{+ 0.00041}$ $Mathematical equation: $0.06976_{-0.00039}^{+0.00041}$$	0.0689 ± 0.0003
Linear LD coefficient, u_{1, TESS}	$0 . 246_{- 0.059}^{+ 0.069}$ $Mathematical equation: $0.246_{-0.059}^{+0.069}$$	0.253 ± 0.027	0.261 ± 0.014
Quadratic LD coefficient, u_{2, Tess}	0.30 ± 0.12	0.289 ± 0.034	0.297 ± 0.014
Mid-transit times, T_{mid, b}(BJD_TDB−2400000)
Epoch = 0 (Sector 15)	58729.68107 ± 0.00049	⋯	…
Epoch = 37 (Sector 41)	59422.02742 ± 0.00042	...	...
Epoch = 38 (Sector 41)	59440.73893 ± 0.00042	…	...
Epoch = 58 (Sector 55)	59814.96045 ± 0.00035	…	…
Epoch = 87 (Sector 75)	60357.61614 ± 0.00044	⋯	⋯
Epoch = 95 (Sector 81)	60507.32448 ± 0.00035	⋯	⋯
Epoch = 96 (Sector 81)	60526.03792 ± 0.00073	⋯	…
Epoch = 97 (Sector 82)	60544.75165 ± 0.00038	⋯	⋯
Derived
Transit impact parameter, b_b(R_*)	$0 . 012_{- 0.008}^{+ 0.141}$ $Mathematical equation: $0.012_{-0.008}^{+0.141}$$	$0 . 133_{- 0.092}^{+ 0.120}$ $Mathematical equation: $0.133_{-0.092}^{+0.120}$$	$0 . 10_{- 0.10}^{+ 0.04}$ $Mathematical equation: $0.10_{-0.10}^{+0.04}$$
Total transit duration, τ_{14, b} (min)	$368 . 9_{- 1.1}^{+ 1.3}$ $Mathematical equation: $368.9_{-1.1}^{+1.3}$$	$369 . 4_{- 1.4}^{+ 1.6}$ $Mathematical equation: $369.4_{-1.4}^{+1.6}$$	⋯
Transit ephemeris
Reference epoch, $T_{0, b}^{b}$ $Mathematical equation: $T_{0, \mathrm{~b}}{ }^{b}$$	$58729 . 6534_{- 0.0066}^{+ 0.0054}$ $Mathematical equation: $58729.6534_{-0.0066}^{+0.0054}$$	58729.67987 ± 0.00038	58729.6814 ± 0.0004
Orbital period, P_b (d)	$18 . 71254_{- 0.00012}^{+ 0.00015}$ $Mathematical equation: $18.71254_{-0.00012}^{+0.00015}$$	18.71204 ± 0.00043	18.71205 ± 0.00001
TTV amplitude, A_TTV(d)	$0 . 0321_{- 0.0040}^{+ 0.0052}$ $Mathematical equation: $0.0321_{-0.0040}^{+0.0052}$$	⋯	⋯
TTV period, P_TTV(E)	$131 . 0_{- 7.7}^{+ 8.9}$ $Mathematical equation: $131.0_{-7.7}^{+8.9}$$	⋯	⋯
TTV phase, ϕ_TTV	$0 . 834_{- 0.021}^{+ 0.020}$ $Mathematical equation: $0.834_{-0.021}^{+0.020}$$	⋯	⋯

Notes. ^(a) Values taken from the planetary shadow model. ^(b) Given in BJD_TDB−2400000.

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