TOI-2015 b: A sub-Neptune in strong gravitational interaction with an outer non-transiting planet

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Table 3

Physical parameters of TOI-2015 system for the 5:3 near-resonance scenario.

Parameter	Unit	TOI-2015 b	TOI-2015 c
Orbital period P	days	${3.348237}_{- 0.000030}^{+ 0.000035}$ $\[3.348237_{-0.000030}^{+0.000035}\]$	${5.582796}_{- 0.000041}^{+ 0.000042}$ $\[5.582796_{-0.000041}^{+0.000042}\]$
Transit-timing T₀	BJD_TDB	${2459424.78570}_{- 0.00015}^{+ 0.00016}$ $\[2459424.78570_{-0.00015}^{+0.00016}\]$	−
Orbital semi-major axis a	au	0.029322 ± 0.000003	0.041232 ± 0.000004
Impact parameter b	R_⋆	$0.74346_{- 0.0030}^{+ 0.0029}$ $\[0.74346{ }_{-0.0030}^{+0.0029}\]$	${2.02}_{- 0.10}^{+ 0.11}$ $\[2.02_{-0.10}^{+0.11}\]$
Transit duration W	hour	${0.9876}_{- 0.0034}^{+ 0.0029}$ $\[0.9876_{-0.0034}^{+0.0029}\]$	−
eccentricity e	−	${0.0789}_{- 0.0016}^{+ 0.0018}$ $\[0.0789_{-0.0016}^{+0.0018}\]$	${0.00033}_{- 0.0002}^{+ 0.0003}$ $\[0.00033_{-0.0002}^{+0.0003}\]$
$\sqrt{e} \cos (w)$ $\[\sqrt{e} \cos (w)\]$	−	${0.2624}_{- 0.0042}^{+ 0.0047}$ $\[0.2624_{-0.0042}^{+0.0047}\]$	${0.01597}_{- 0.0059}^{+ 0.0060}$ $\[0.01597_{-0.0059}^{+0.0060}\]$
$\sqrt{e} \sin (w)$ $\[\sqrt{e} \sin (w)\]$	−	$- {0.1008}_{- 0.0082}^{+ 0.0012}$ $\[-0.1008_{-0.0082}^{+0.0012}\]$	${0.0087}_{- 0.0032}^{+ 0.0023}$ $\[0.0087_{-0.0032}^{+0.0023}\]$
Mean anomaly M	deg	−	${3.547}_{- 0.025}^{+ 0.019}$ $\[3.547_{-0.025}^{+0.019}\]$
Orbital inclination i	deg	87.61 ± 0.01	${85.70}_{- 0.24}^{+ 0.27}$ $\[85.70_{-0.24}^{+0.27}\]$
Radius ratio R_p/R_⋆	−	${0.09278}_{- 0.00030}^{+ 0.00035}$ $\[0.09278_{-0.00030}^{+0.00035}\]$	−
Scaled semi-major axis a/R_⋆	−	${19.2811}_{- 0.0060}^{+ 0.0061}$ $\[19.2811_{-0.0060}^{+0.0061}\]$	27.1122 ± 0.0098
Planet radius R_p	R_⊕	${3.309}_{- 0.011}^{+ 0.013}$ $\[3.309_{-0.011}^{+0.013}\]$	−
Planet Mass M_p	M_⊕	${9.20}_{- 0.35}^{+ 0.32}$ $\[9.20_{-0.35}^{+0.32}\]$	$8.91_{- 0.40}^{+ 0.38}$ $\[8.91{ }_{-0.40}^{+0.38}\]$
Planet density ρ_p	g/cm³	${1.400}_{- 0.056}^{+ 0.052}$ $\[1.400_{-0.056}^{+0.052}\]$	−
Planet irradiation S _p	S_⊕	13.185 ± 0.387	6.68 ± 0.19
Equilibrium temperature T_eq	K	$530.9_{- 3.9}^{+ 2.9}$ $\[530.9{ }_{-3.9}^{+2.9}\]$	448 ± 3
Planet surface gravity log(g_p[cm/s²])	−	2.915 ± 0.105	−
^(a) TSM	−	149.4 ± 5.6	−
^(a) ESM	−	10.8 ± 0.3	−

Notes. ^(a) TSM and ESM values are computed from Kempton et al. (2018).

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