Characterisation of the TOI-421 planetary system using CHEOPS, TESS, and archival radial velocity data

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Table 1

Adopted stellar parameters of TOI-421.

Parameter	Value	Unit	Source
Gmag	9.78	–	SWEET-Cat
Spectral type	G9V	–	C2020
T_eff	5291 ± 64	K	This work
log g	4.48 ± 0.03	–	This‘ work
Radius	0.866 ± 0.006	R_⊙	This work
Mass	${0.833}_{- 0.054}^{+ 0.048}$ $0.833_{ - 0.054}^{ + 0.048}$	M_⊙	This work
Density	1.29 ± 0.15	ρ_⊙	This work
Age	${10.9}_{- 5.2}^{+ 2.9}$ $10.9_{ - 5.2}^{ + 2.9}$	Gyr	This work
Rotation period	39.6 ± 1.6	days	This work
[Fe/H]	−0.044 ± 0.04	–	This work
[Ni/H]	−0.04 ± 0.03	–	This work
[Mg/H]	0.02 ± 0.04	–	This work
[Si/H]	−0.05 ± 0.05	–	This work
[Ti/H]	0.04 ± 0.06	–	This work
[Na/H]	−0.05 ± 0.04	–	This work
v sin i	1.8 ± 1.0	km s⁻¹	C2020

Notes. The Gaia EDR3 ID of TOI-421 is 2984582227215748864. C2020 refers to Carleo et al. (2020).

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