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.10

Properties of the Kepler-68 system

Parameter	Symbol	Value	Unit	Origin
Stellar parameters

Spectral type		G1		Grieves et al. (2018)
Stellar temperature	T_eff	5793 ± 74	K	Gilliland et al. (2013)
Stellar radius	R_*	1 .243 ± 0.019	R_⊙	Gilliland et al. (2013)
Stellar spin inclination	i_*	—	deg	—
Stellar equatorial period	P_eq	—	d	—
Stellar projected velocity	v_eq sin i_*	0.5 ± 0.5	km s−1	Gilliland et al. (2013)
Age	τ	6.3 ± 1.7	Gyr	Gilliland et al. (2013)
Limb-darkening coefficients	u₁	0.449		Exofast
	u₂	0.267

Planet b parameters

Orbital period	P	5.3987525913 ± 0.0000005231	d	Gajdoš et al. (2019)
Transit epoch	T₀	2455006.85878000 ± 0.00007639	BJD_tdb	Gajdoš et al. (2019)
Eccentricity	e	0.0 (fixed)		Mills et al. (2019)
Argument of periastron	ω	90 (fixed)	^deg	Mills et al. (2019)
Stellar reflex velocity	K	${2.70}_{- 0.46}^{+ 0.48}$ $2.70_{ - 0.46}^{ + 0.48}$	m s−1	Mills et al. (2019)
Scaled separation	a/R_*	10.68 ± 0.14		Gilliland et al. (2013)
Orbital inclination	i	87.60 ± 0.90	deg	Gilliland et al. (2013)
Impact parameter	b	0.45 ± 0.17		Gilliland et al. (2013)
Transit duration	T₁₄	3.459 ± 0.009	h	Gilliland et al. (2013)
Planet-to-star radius ratio	R_p/R_*	0.01700 ± 0.00046		Gilliland et al. (2013)
Projected spin-orbit angle	λ	Nondetection		This work

Planet c parameters

Orbital period	P	9.60502738150 ± 0.0000132365	d	Gajdoš et al. (2019)
Transit epoch	T₀	2454969.38207000 ± 0.00110495	BJD_tdb	Gajdoš et al. (2019)
Eccentricity	e	0.0 (fixed)		Mills et al. (2019)
Argument of periastron	ω	90 (fixed)	^deg	Mills et al. (2019)
Stellar reflex velocity	K	${0.59}_{- 0.52}^{+ 0.50}$ $0.59_{ - 0.52}^{ + 0.50}$	m s−1	Mills et al. (2019)

Planet d parameters

Orbital period	P	${634.6}_{- 3.7}^{+ 4.1}$ $634.6_{ - 3.7}^{ + 4.1}$	d	Mills et al. (2019)
Transit epoch	T₀	2455878 ± 11	BJD_tdb	Mills et al. (2019)
Eccentricity	e	${0.112}_{- 0.034}^{+ 0.035}$ $0.112_{ - 0.034}^{ + 0.035}$		Mills et al. (2019)
Argument of periastron	ω	$- {1.13}_{- 0.45}^{+ 0.36}$ $- 1.13_{ - 0.45}^{ + 0.36}$	^deg	Mills et al. (2019)
Stellar reflex velocity	K	${17.75}_{- 0.49}^{+ 0.50}$ $17.75_{ - 0.49}^{ + 0.50}$	m s−1	Mills et al. (2019)

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