Kepler-423b: a half-Jupiter mass planet transiting a very old solar-like star

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Table 3

Model parametrisation used in the basic system characterisation.

Model parameter	Notation

Planetary orbital period	P_orb
Planetary mid-transit epoch	T₀
Bulk stellar density	ρ_⋆
Impact parameter	b
Orbit eccentricity	e
Argument of periastron	ω

Planet-to-star area ratio
Planet-to-star surface brightness ratio^a	f

Linear limb-darkening coefficient	u₁
Quadratic limb-darkening coefficient	u₂
Kepler LC data scatter	σ_LC
Kepler SC data scatter	σ_SC

Systemic radial velocity	V_γ
Radial velocity semi-amplitude	K

Quarterly crowding metric	C_i, with i ∈ [1..17]

Notes.

^(a)

We defined the planet-to-star surface brightness ratio f as the flux ratio per projected unit area (instead of as eclipse depth). The eclipse depth is thus .

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