A joint effort to discover and characterize two resonant mini-Neptunes around TOI-1803 with TESS, HARPS-N, and CHEOPS

Home

All issues

Volume 695 (March 2025)

A&A, 695 (2025) A273

Full HTML

Open Access

Table C.1

Priors and results for the modeling of planets b and c from the analysis of the photometric and radial velocities time series. Eccentric orbits.

Combined Radial Velocities - Multidimensional GP - Photometric fit

Parameter	Unit	Prior	Value

Star
Stellar density (ρ_⋆)	ρ_⊙	N(2.00, 0.13)	2.01 ±0.13
CHEOPS Limb Darkening (q_1,CHEOPS)		u(0, 1)	${0.487}_{- 0.078}^{+ 0.085}$ $0.487_{ - 0.078}^{ + 0.085}$
CHEOPS Limb Darkening (q_2,CHEOPS)		u(0, 1)	${0.463}_{- 0.034}^{+ 0.040}$ $0.463_{ - 0.034}^{ + 0.040}$
TESS Limb Darkening (q_1,TESS)		u(0, 1)	${0.48}_{- 0.09}^{+ 0.10}$ $0.48_{ - 0.09}^{ + 0.10}$
TESS Limb Darkening (q_2,TESS)		u(0,1)	${0.38}_{- 0.034}^{+ 0.041}$ $0.38_{ - 0.034}^{ + 0.041}$

Planet b

Parameter	Unit	Prior	Value

Orbital period (P_b)	days	u(6.2, 6.4)	6.293264±0.000034
Central time of transit (T_0,b)	BTJD^a	u(1904,1905)	1904.6262±0.0035
Impact parameter (b)		u(0, 1)	${0.31}_{- 0.21}^{+ 0.22}$ $0.31_{ - 0.21}^{ + 0.22}$
R_p / R_*		u(0.00001, 0.5)	0.0384±0.0016
Planetary Radius (_{R_p})	R_⊕	…	3.00 ± 0.12
a / R_⋆		…	18.1 ± 0.4
Semi-major axis a	AU	…	0.060 ± 0.001
Radial Velocity semi-amplitude (K)	m/s	u(0, 10)	4.5±1.1
Inclination (i)	deg	…	88.99 ± 0.66
$\sqrt{e} \sin ω$ $\sqrt e \sin \omega$		u(-1,+1)	${0.01}_{- 0.27}^{+ 0.18}$ $0.01_{ - 0.27}^{ + 0.18}$
$\sqrt{e} \cos ω$ $\sqrt e \cos \omega$		u(-1,+1)	${0.23}_{- 0.24}^{+ 0.16}$ $0.23_{ - 0.24}^{ + 0.16}$
Eccentricity (e)		…	${0.105}_{- 0.071}^{+ 0.11}$ $0.105_{ - 0.071}^{ + 0.11}$
Argument of periastron (ω)		…	$5_{- 61}^{+ 75}$ $5_{ - 61}^{ + 75}$
Transit duration (T₁₄)	days	…	0.109 ± 0.010
Planetary mass (M_p)	M_⊕	…	10.6 ± 2.6
Planetary density (ρ_p)	ρ_⊕	…	0.39 ± 0.11
Instellation (F_i)	W m⁻²	…	(8.4±0.6)⋅104
Equilibrium Temperature (T_eq)	K^b	…	714 ± 12

Planet c

Parameter	Unit	Prior	Value

Orbital period (P_c)	days	u(12.8, 13.0)	12.885776±0.000036
Central time of transit (T_0,c)	BTJD^a	u(1911,1912)	1911.6748±0.0019
Impact parameter (b)		u(0, 1)	${0.740}_{- 0.27}^{+ 0.089}$ $0.740_{ - 0.27}^{ + 0.089}$
R_p / R_*		u(0.00001, 0.5)	${0.0537}_{- 0.0039}^{+ 0.0031}$ $0.0537_{ - 0.0039}^{ + 0.0031}$
Planetary Radius (R_p)	R_⊕	…	${4.19}_{- 0.30}^{+ 0.25}$ $4.19_{ - 0.30}^{ + 0.25}$
a/R_⋆		…	29.19 ± 0.6
Semi-major axis a	AU	…	0.097 ± 0.002
Radial Velocity semi-amplitude (K)	m/s	u(0, 10)	${2.0}_{- 1.1}^{+ 1.0}$ $2.0_{ - 1.1}^{ + 1.0}$
Inclination (i)	deg	…	${88.48}_{- 0.11}^{+ 0.16}$ $88.48_{ - 0.11}^{ + 0.16}$
$\sqrt{e} \sin ω$ $\sqrt e \sin \omega$		u(−1,+1)	${0.16}_{- 044}^{+ 0.36}$ $0.16_{ - 044}^{ + 0.36}$
$\sqrt{e} \cos ω$ $\sqrt e \cos \omega$		u(−1,+1)	${0.15}_{- 0.38}^{+ 0.29}$ $0.15_{ - 0.38}^{ + 0.29}$
Eccentricity (e)		…	${0.24}_{- 0.16}^{+ 0.17}$ $0.24_{ - 0.16}^{ + 0.17}$
Argument of periastron (ω)		…	$40_{- 101}^{+ 74}$ $40_{ - 101}^{ + 74}$
Transit duration (T₁₄)	days	…	${0.105}_{- 0.013}^{0.027}$ $0.105_{ - 0.013}^{0.027}$
Planetary mass (M_p)	M_⊕	…	5.7 ± 3.0
Planetary density (ρ_p)	ρ_⊕	…	0.08 ± 0.04
Instellation (F_i)	W m⁻²	…	(3.22±0.23)⋅104
Equilibrium Temperature (T_eq)	K^b	…	561 ± 10

Activity

Stellar rotation period (P_rot)	days	u(12.0, 15.0)	${13.657}_{- 0.030}^{+ 0.028}$ $13.657_{ - 0.030}^{ + 0.028}$
Decay time (P_dec)	days	u(10, 2000)	$122_{- 26}^{+ 29}$ $122_{ - 26}^{ + 29}$
Coherence Scale (w)		N(0.35, 0.035)	${0.400}_{- 0.025}^{+ 0.026}$ $0.400_{ - 0.025}^{ + 0.026}$

Notes. ^(a)TESS Barycentric Julian Date (BJD_TDB - 2457000). ^(b)Computed as $T_{eq} = T_{⋆} {(\frac{R_{⋆}}{2 a})}^{1 / 2} {[f (1 - A_{b})]}^{1 / 4}$ ${T_{{\rm{eq}}}} = {T_ \star }{\left( {{{{R_ \star }} \over {2a}}} \right)^{1/2}}{\left[ {f\left( {1 - {A_b}} \right)} \right]^{1/4}}$ , assuming a Bond albedo A_b = 0.3 and f = 1.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.