Searching for hot water world candidates with CHEOPS - Refining the radii and analysing the internal structures and atmospheric lifetimes of TOI-238 b and TOI-1685 b

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Table 2

Stellar properties of TOI-238 and TOI-1685.

	TOI-238		TOI-1685
Parameter	Value	Ref.	Value	Ref.
α (J2000)	23h 16m 55.52s	[1]	04h 34m 22.50s	[1]
δ (J2000)	−18° 36′ 23.92″	[1]	+43°02′14.69″	[1]
G mag	10.4901 ± 0.0028	[1]	12.2846 ± 0.0028	[1]
Spectral type	K2V	[2]	M3V	[3]
T_eff (K)	5059 ± 89	[2]	3470 ± 102	[4]
log g (cgs)	4.58 ± 0.05	[2]	4.68 ± 0.11	[4]
v sin i (km s⁻¹)	2.3 ± 0.3	[4]	< 2.0	[3]
[Fe/H] (dex)	−0.114 ± 0.051	[2]	0.01 ± 0.12	[4]
[Mg/H] (dex)	−0.12 ± 0.06	[2]	0.04 ± 0.17	[4]
[Si/H] (dex)	−0.09 ± 0.06	[2]	0.02 ± 0.17	[4]
R_⋆ (R_⊙)	0.756 ± 0.007	[4]	0.462 ± 0.013	[4]
M_⋆ (M_⊙)	${0.781}_{- 0.039}^{+ 0.040}$ $\[0.781_{-0.039}^{+0.040}\]$	[4]	0.466 ± 0.019	[4]
t_⋆ (Gyr)	${7.9}_{- 5.2}^{+ 4.5}$ $\[7.9_{-5.2}^{+4.5}\]$	[4]	1.4 ± 0.1	[4]

Notes. [1] Gaia Collaboration (2021); [2] Suárez Mascareño et al. (2024); [3] Bluhm et al. (2021); [4] This work.

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