DREAM - I. Orbital architecture orrery | Astronomy & Astrophysics (A&A)

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Volume 669 (January 2023)

A&A, 669 (2023) A63

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Table C.9

Properties of the Kepler-63 system

Parameter	Symbol	Value	Unit	Origin
Stellar parameters

Spectral type		G5		Frasca et al. (2016)
Stellar temperature	T_eff	55 6 ± 50	K	Sanchis-Ojeda et al. (2013)
Stellar radius	R_*	${0.901}_{- 0.022}^{+ 0.027}$ $0.901_{ - 0.022}^{ + 0.027}$	R_⊙	Sanchis-Ojeda et al. (2013)
Stellar spin inclination	i_*	138 ± 7	deg	Sanchis-Ojeda et al. (2013)
Stellar equatorial period	P_eq	5.401 ± 0.014	d	Sanchis-Ojeda et al. (2013)
Stellar projected velocity	v_eq sin i_*	${7.47}_{- 2.7}^{+ 2.6}$ $7.47_{ - 2.7}^{ + 2.6}$	km s⁻¹	This work
Age	τ	0.210 ± 0.045	Gyr	Sanchis-Ojeda et al. (2013)
Limb-darkening coefficients	u₁	0.527		Exofast
	u₂	0.217

Planet b parameters

Orbital period	P	9.4341503479 ± 0.0000003339	d	Gajdoš et al. (2019)
Transit epoch	T₀	2455010.84340000 ± 0.00002768	BJD_TDB	Gajdoš et al. (2019)
Eccentricity	e	0 (fixed)††		—
Argument of periastron	ω	90 (fixed)††	^deg	—
Stellar reflex velocity	K	40 ± 20††	m s⁻¹	Sanchis-Ojeda et al. (2013)
Scaled separation	a/R_*	19.12 ± 0.08		Sanchis-Ojeda et al. (2013)
Orbital inclination	i	${87.806}_{- 0.019}^{+ 0.018}$ $87.806_{ - 0.019}^{ + 0.018}$	deg	Sanchis-Ojeda et al. (2013)
Impact parameter	b	0.732 ± 0.003		Sanchis-Ojeda et al. (2013)
Transit duration	T₁₄	2.903 ± 0.003	h	Sanchis-Ojeda et al. (2013)
Planet-to-star radius ratio	R_p/R_*	0.0622 ± 0.0010		Sanchis-Ojeda et al. (2013)
Projected spin-orbit angle	λ	$- 135_{- 26.8}^{+ 21.2}$ $- 135_{ - 26.8}^{ + 21.2}$	deg	This work
3D spin-orbit angle	ψ ≡ ψ_S	${114.6}_{- 12.5}^{+ 16.6^{†}}$ $114.6_{ - 12.5}^{ + 16.6{\,^\dag }}$	deg	This work

Notes:^† The analysis from Sanchis-Ojeda et al. (2013) favors the configuration where the southern stellar pole is visible.^†† The RV data from Sanchis-Ojeda et al. (2013) are too strongly affected by stellar activity to accurately constrain the orbital properties. The reflex velocity semi-amplitude we adopt comes from the RM effect and seems compatible with the apparent value from RVs. The orbit is fixed to circular, as Sanchis-Ojeda et al. (2013) set a 3σ upper limit of 0.45 on e.

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