The TOI-2427 system: Two close-in planets orbiting a late K-dwarf star

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Table 4

Derived parameters for the TOI-2427 planetary system.

Parameter	TOI-2427 b	TOI-2427 c
Planet mass M^p (M_⊕)	${5.69}_{- 0.50}^{+ 0.51}$ $5.69_{-0.50}^{+0.51}$	${6.46}_{- 0.78}^{+ 0.79}$ $6.46_{-0.78}^{+0.79}$ ^(a)
Planet radius R_p(R_⊕)	${1.64}_{- 0.11}^{+ 0.12}$ $1.64_{-0.11}^{+0.12}$	$({2.7}_{- 0.8}^{+ 1.1})$ $\left(2.7_{-0.8}^{+1.1}\right)$ ^(b)
Planet density ρ_p(g cm⁻³)	${7.1}_{- 1.4}^{+ 1.8}$ $7.1_{-1.4}^{+1.8}$	$(\geq {2.1}_{- 1.9}^{+ 2.6})$ $\left(\geq 2.1_{-1.9}^{+2.6}\right)$ ^(b)
Scaled semimajor axis a/R_⋆	${6.72}_{- 0.29}^{+ 0.26}$ $6.72_{-0.29}^{+0.26}$	16.75 ± 0.40
semimajor axis of the planetary orbit a_p (AU)	${0.0202}_{- 0.0012}^{+ 0.0013}$ $0.0202_{-0.0012}^{+0.0013}$	0.05 ± 0.01
Eccentricity e	${0.074}_{- 0.052}^{+ 0.076}$ $0.074_{-0.052}^{+0.076}$	${0.089}_{- 0.062}^{+ 0.116}$ $0.089_{-0.062}^{+0.116}$
Argument of periastron of stellar orbit ω_⋆(deg)	${76.6}_{- 101.1}^{+ 48.1}$ $76.6_{-101.1}^{+48.1}$	$- {21.2}_{- 90.2}^{+ 152.0}$ $-21.2_{-90.2}^{+152.0}$
Time of periastron passage (BJD_TDB −2 450 000)	${9169.61}_{- 0.21}^{+ 0.19}$ $9169.61_{-0.21}^{+0.19}$	${9472.74}_{- 1.99}^{+ 1.66}$ $9472.74_{-1.99}^{+1.66}$
Orbit inclination i (deg)	${82.27}_{- 0.66}^{+ 0.52}$ $82.27_{-0.66}^{+0.52}$	–
Total transit duration (1st to 4th contact) τ₁₄(hr)	0.804 ± 0.027	–
Full transit duration (2nd to 3rd contact) τ₂₃(hr)	0.676 ± 0.037	–
Equilibrium temperature^(c) T_eq(K)	${1147.8}_{- 37.5}^{+ 39.0}$ $1147.8_{-37.5}^{+39.0}$	–
Received irradiance (F_⊕)	${289.2}_{- 36.0}^{+ 41.4}$ $289.2_{-36.0}^{+41.4}$	–

Notes. ^aMinimum mass M_c sin i_c.^b Estimated using Forecaster and assuming that the minimum mass of TOI-2427 c is its true mass.^c Assuming zero albedo and uniform redistribution of heat.

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