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.7

Properties of the K2-105 system

Parameter	Symbol	Value	Unit	Origin
Stellar parameters

Spectral type		K1		Luo et al. (2018)
Stellar temperature	T_eff	$5636_{- 52}^{+ 49}$ $5636_{ - 52}^{ + 49}$		Castro-Gonzalez et al. (2022)
Stellar radius	R_*	0.97 ± 0.01		Castro-Gonzalez et al. (2022)
Stellar spin inclination	i_*	—	deg	—
Stellar equatorial period	P_eq	—	d	—
Stellar projected velocity	v_eq sin i_*	${2.13}_{- 0.92}^{+ 0.96}$ $2.13_{ - 0.92}^{ + 0.96}$	km s⁻¹	This work
Age	τ	> 0.6	Gyr	Narita et al. (2017)
Limb-darkening coefficients	u₁	0.338		Exofast
	u₂	0.186

Planet b parameters

Orbital period	P	8.267043 ± 0.000015	d	This work (STELLA)
		8.2669897 ± 0.0000057	d	This work (TESS + K2)
Transit epoch	T₀	2457379.46827 ± 0.00114	BJD_tdb	This work (STELLA)
		${245863.23873}_{- 0.00063}^{+ 0.00069}$ $245863.23873_{ - 0.00063}^{ + 0.00069}$	BJD_tdb	This work (TESS + K2)
Eccentricity	e	0		(fixed)
Argument of periastron	ω	90	^deg	(fixed)
Stellar reflex velocity	K	9.4 ± 5.8	m s⁻¹	Narita et al. (2017)
Scaled separation	a/R_*	17.39 ± 0.19		This work (TESS + K2)
Orbital inclination	i	88.62 ± 0.10	deg	This work (TESS + K2)
Impact parameter	b	0.42 ± 0.03		This work (TESS + K2)
Transit duration	T₁₄	3.43 ± 0.03	h	This work (TESS + K2)
Planet-to-star radius ratio	R_p/R_*	0.03332 ± 0.00067		This work (TESS + K2)
Projected spin-orbit angle	λ	$- 81_{- 47}^{+ 50}^{†}$ $- 81_{ - 47}^{ + 50}{\,^\dag }$	deg	This work

Notes:^† We consider this measurement as marginal, as λ is not constrained at the 3σ level (see text)

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