Table A.1
HD 108236 system parameters obtained from analyses of the TESS and CHEOPS LCs, in comparison to what was found by Daylan et al. (2021).
| Parameters | Daylan et al. (2021) | TESS-only | CHEOPS-only | TESS+CHEOPS | |||
|---|---|---|---|---|---|---|---|
| e free | e free | e free | e free | e < 0.1 | |||
| Planet b: 12 TESS transits; 1 CHEOPS transit | |||||||
| Eclipse timing(a) | T0 | [BJD] |  |
 |
 |
 |
8773.2964 ± 0.0013 |
| Period | P | [days] |  |
 |
 |
 |
 |
| Transit depth(b) | dF | [ppm] | 268 ± 31 |  |
 |
273 ± 17 | 285 ± 17 |
| Transit duration | W | [h] |  |
 |
 |
 |
2.384 ± 0.093 |
| Impact parameter | b | [R⋆] | 0.38 ± 0.24 |  |
 |
0.43 ± 0.12 |  |
| Semi-major axis | a | [AU] | 0.0469 ± 0.0017 | 0.04505 ± 0.00077 |  |
0.04436 ± 0.00081 |  |
| Orbital inclination | ip | [°] |  |
 |
 |
 |
 |
| Eccentricity | e |  |
 |
 |
 |
 |
|
| Arg. of pericentre | ω | [°] | 190 ± 140 |  |
 |
 |
 |
| Radius | Rp | [R⊕] | 1.586 ± 0.098 |  |
 |
1.579 ± 0.052 | 1.615 ± 0.051 |
| Planet c: 8 TESS transits; 1 CHEOPS transit | |||||||
| Eclipse timing(a) | T0 | [BJD] |  |
 |
 |
 |
 |
| Period | P | [days] |  |
 |
 |
 |
 |
| Transit depth(b) | dF | [ppm] |  |
 |
 |
 |
 |
| Transit duration | W | [h] | 2.913 ± 0.095 |  |
 |
2.915 ± 0.10 |  |
| Impact parameter | b | [R⋆] |  |
0.30 ± 0.12 |  |
 |
 |
| Semi-major axis | a | [AU] | 0.0651 ± 0.0024 |  |
 |
0.0612 ± 0.0010 | 0.0620 ± 0.0012 |
| Orbital inclination | ip | [°] |  |
88.87 ± 0.42 |  |
 |
 |
| Eccentricity | e |  |
 |
 |
 |
 |
|
| Arg. of pericentre | ω | [°] | 210 ± 120 |  |
89 ± 53 |  |
 |
| Radius | Rp | [R⊕] |  |
 |
 |
2.102 ± 0.050 | 2.071 ± 0.052 |
| Planet d: 4 TESS transits; 1 CHEOPS transit | |||||||
| Eclipse timing(a) | T0 | [BJD] |  |
 |
 |
 |
 |
| Period | P | [days] |  |
14.1756 ± 0.0011 |  |
 |
 |
| Transit depth(b) | dF | [ppm] | 787 ± 53 |  |
 |
754 ± 29 |  |
| Transit duration | W | [h] |  |
 |
 |
 |
 |
| Impact parameter | b | [R⋆ ] |  |
 |
 |
0.327 ± 0.075 |  |
| Semi-major axis | a | [AU] | 0.1131 ± 0.0040 |  |
 |
0.1087 ± 0.0020 | 0.1074 ± 0.0023 |
| Orbital inclination | ip | [°] |  |
 |
 |
 |
 |
| Eccentricity | e |  |
 |
 |
 |
 |
|
| Arg. of pericentre | ω | [°] |  |
 |
 |
 |
 |
| Radius | Rp | [R⊕ ] | 2.72 ± 0.11 |  |
 |
2.626 ± 0.057 |  |
| Planet e: 2 TESS transits; 1 CHEOPS transit | |||||||
| Eclipse timing(a) | T0 | [BJD] |  |
 |
 |
 |
 |
| Period | P | [days] |  |
19.5899 ± 0.0018 |  |
 |
 |
| Transit depth(b) | dF | [ppm] |  |
 |
 |
 |
 |
| Transit duration | W | [h] |  |
 |
 |
 |
 |
| Impact parameter | b | [R⋆ ] |  |
 |
 |
0.374 ± 0.10 |  |
| Semi-major axis | a | [AU] | 0.1400 ± 0.0052 | 0.1362 ± 0.0026 | 0.1333 ± 0.0017 | 0.1341 ± 0.0020 |  |
| Orbital inclination | ip | [°] |  |
 |
 |
 |
 |
| Eccentricity | e |  |
 |
 |
 |
 |
|
| Arg. of pericentre | ω | [°] |  |
 |
 |
 |
 |
| Radius | Rp | [R⊕ ] |  |
 |
 |
 |
3.083 ± 0.052 |
| Planet f: 2 TESS transits; 1 CHEOPS transit | |||||||
| Eclipse timing(a) | T0 | [BJD] |  |
 |
 |
 |
|
| Period | P | [days] |  |
 |
 |
 |
|
| Transit depth(b) | dF | [ppm] |  |
 |
 |
 |
|
| Transit duration | W | [h] |  |
 |
 |
 |
|
| Impact parameter | b | [R⋆ ] |  |
 |
 |
0.808 ± 0.022 | |
| Semi-major axis | a | [AU] | 0.1773 ± 0.0036 | 0.1759 ± 0.0037 | 0.1750 ± 0.0041 |  |
|
| Orbital inclination | ip | [°] |  |
 |
 |
88.963 ± 0.042 | |
| Eccentricity | e | 0.38 ± 0.23 | 0.245 ± 0.092 |  |
 |
||
| Arg. of pericentre | ω | [°] |  |
91 ± 29 |  |
 |
|
| Radius | Rp | [R⊕ ] | 1.83 ± 0.16 |  |
 |
 |
|
Notes. The columns labelled as TESS-only, CHEOPS-only, and TESS+CHEOPS refer to the results obtained considering five transiting planets in the system. All results have been obtained considering e as a free parameter, except for the last column for which e has been set to be smaller than 0.1. The TESS+CHEOPS analysis with e < 0.1 gives our final adopted solution for the system. (a)Epoch shifted by −2 450 000. Time standard is Terrestrial Time (TT). (b) d
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