Tracking Advanced Planetary Systems (TAPAS) with HARPS-N - VIII. A wide-orbit planetary companion in the hot-Jupiter system HD 118203

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Volume 688 (August 2024)

A&A, 688 (2024) A172

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Table A.3

Systemic parameters for HD 118203 from the two-planet model (Sec. 3.2) and the astrometric constraints (Sec. 3.3).

Parameter	Prior	This paper	Pepper et al. (2020)	Castro-González et al. (2024)
HD 118203 b
Orbital period, P_orb,b (d)	$U$ $\[\mathcal{U}\]$ (6.134, 6.136)	6.1349890(13)	${6.134985}_{- (30)}^{+ (29)}$ $\[6.134985_{-(30)}^{+(29)}\]$	6.1349847(20)
Conjunction time, T_0,b (BJD_TDB)^a	$U$ $\[\mathcal{U}\]$ (8712.56, 8712.76)	${8712.66178}_{- (19)}^{+ (20)}$ $\[8712.66178_{-(19)}^{+(20)}\]$	8712.66175(17)	...
RV amplitude, K_b (km s⁻¹)	$U$ $\[\mathcal{U}\]$ (0.15, 0.29)	0.2222 ± 0.0021	${0.2180}_{- 0.0043}^{+ 0.0044}$ $\[0.2180_{-0.0043}^{+0.0044}\]$	${0.2180}_{- 0.0039}^{+ 0.0040}$ $\[0.2180_{-0.0039}^{+0.0040}\]$
Orbital eccentricity, e_b	$U$ $\[\mathcal{U}\]$ (0, 1)	0.301 ± 0.006	0.314 ± 0.017	0.316 ± 0.020
Argument of periastron, ω_b (°)	$U$ $\[\mathcal{U}\]$ (0, 360)	157.4 ± 1.9	152.8 ± 3.1	152.5 ± 2.7
Radius ratio, R_b/R_*	$U$ $\[\mathcal{U}\]$ (0.05, 0.06)	${0.05541}_{- 0.00017}^{+ 0.00025}$ $\[0.05541_{-0.00017}^{+0.00025}\]$	${0.05552}_{- 0.00017}^{+ 0.00019}$ $\[0.05552_{-0.00017}^{+0.00019}\]$	${0.05546}_{- 0.00022}^{+ 0.00024}$ $\[0.05546_{-0.00022}^{+0.00024}\]$
Scaled sum of radii, (R_b + R_*)/a_b	$U$ $\[\mathcal{U}\]$ (0.1, 0.2)	${0.1415}_{- 0.0020}^{+ 0.0026}$ $\[0.1415_{-0.0020}^{+0.0026}\]$	...	...
Orbital inclination, i_b (°)	$U$ $\[\mathcal{U}\]$ (80, 90)	${88.9}_{- 1.0}^{+ 0.8}$ $\[88.9_{-1.0}^{+0.8}\]$	${88.88}_{- 0.97}^{+ 0.77}$ $\[88.88_{-0.97}^{+0.77}\]$	${89.16}_{- 0.65}^{+ 0.57}$ $\[89.16_{-0.65}^{+0.57}\]$
Transit impact parameter, b_b	...	${0.12}_{- 0.08}^{+ 0.10}$ $\[0.12_{-0.08}^{+0.10}\]$	${0.111}_{- 0.076}^{+ 0.095}$ $\[0.111_{-0.076}^{+0.095}\]$	0.14 ± 0.10
Transit depth, δ_tr,b (ppth)	...	${3.564}_{- 0.024}^{+ 0.023}$ $\[3.564_{-0.024}^{+0.023}\]$	${3.083}_{- 0.018}^{+ 0.021}$ $\[3.083_{-0.018}^{+0.021}\]$	3.075 ± 0.025
Total transit duration, τ_14,b (h)	...	${5.638}_{- 0.011}^{+ 0.013}$ $\[5.638_{-0.011}^{+0.013}\]$	${5.650}_{- 0.012}^{+ 0.014}$ $\[5.650_{-0.012}^{+0.014}\]$	...
Scaled semi-major axis, a_b/R_*	...	${7.46}_{- 0.14}^{+ 0.11}$ $\[7.46_{-0.14}^{+0.11}\]$	${7.23}_{- 0.14}^{+ 0.13}$ $\[7.23_{-0.14}^{+0.13}\]$	9.32 ± 0.31
Semi-major axis, a_b (au)	...	0.0701 ± 0.0004	${0.0707}_{- 0.0011}^{+ 0.0010}$ $\[0.0707_{-0.0011}^{+0.0010}\]$	0.08635 ± 0.00057
Mass, M_b (M_Jup)	...	2.182 ± 0.033	${2.166}_{- 0.079}^{+ 0.074}$ $\[2.166_{-0.079}^{+0.074}\]$	2.282 ± 0.045
Radius, R_b (R_Jup)	...	1.12 ± 0.09	${1.136}_{- 0.028}^{+ 0.029}$ $\[1.136_{-0.028}^{+0.029}\]$	1.076 ± 0.035
Density, ρ_b (g cm⁻³)	...	2.1 ± 0.5	1.83 ± 0.12	2.27 ± 0.23
Surface gravity, g_b (m s⁻²)	...	${45.6}_{- 1.9}^{+ 1.5}$ $\[45.6_{-1.9}^{+1.5}\]$	41.6 ± 1.9	48.9 ± 3.4
Equilibrium temperature^b, T_eq,b (K)	...	$1371_{- 17}^{+ 16}$ $\[1371_{-17}^{+16}\]$	1367 ± 23	1360 ± 23
HD 118203 c
Orbital period, P_orb,c (d)	$U$ $\[\mathcal{U}\]$ (3000, 10000)	$5070_{- 230}^{+ 240}$ $\[5070_{-230}^{+240}\]$	...	...
Conjunction time, T_0,c (BJD_TDB)^a	$U$ $\[\mathcal{U}\]$ (4000, 10000)	$6825_{- 63}^{+ 68}$ $\[6825_{-63}^{+68}\]$	...	...
RV amplitude, K_c (km s⁻¹)	$U$ $\[\mathcal{U}\]$ (0.01, 0.4)	${0.118}_{- 0.010}^{+ 0.011}$ $\[0.118_{-0.010}^{+0.011}\]$	...	...
Orbital eccentricity, e_c	$U$ $\[\mathcal{U}\]$ (0, 1)	0.257 ± 0.034	...	...
Argument of periastron, ω_c (°)	$U$ $\[\mathcal{U}\]$ (0, 360)	${175.4}_{- 4.6}^{+ 4.3}$ $\[175.4_{-4.6}^{+4.3}\]$	...	...
Orbital inclination^c, i_c (°)	$U$ $\[\mathcal{U}\]$ (0, 180)	$95_{- 19}^{+ 15}$ $\[95_{-19}^{+15}\]$	...	...
Semi-major axis, a_c (au)	...	6.20 ± 0.20	...	...
Mass, M_c (M_Jup)	...	${11.1}_{- 1.0}^{+ 1.3}$ $\[11.1_{-1.0}^{+1.3}\]$	...	...
Equilibrium temperature^b, T_eq,c (K)	...	146 ± 3	...	...
Common
q₁ LD coefficient, q_1,JTESS	$U$ $\[\mathcal{U}\]$ (0, 1)	${0.237}_{- 0.034}^{+ 0.039}$ $\[0.237_{-0.034}^{+0.039}\]$	...	...
q₂ LD coefficient, q_2,TESS	$U$ $\[\mathcal{U}\]$ (0, 1)	${0.369}_{- 0.079}^{+ 0.077}$ $\[0.369_{-0.079}^{+0.077}\]$	...	...
Linear LD coefficient, u_1,TESS	...	0.36 ± 0.05	0.355 ± 0.063	${0.347}_{- 0.042}^{+ 0.041}$ $\[0.347_{-0.042}^{+0.041}\]$
Quadratic LD coefficient, u_2,TESS	...	0.13 ± 0.08	0.14 ± 0.10	${0.150}_{- 0.069}^{+ 0.071}$ $\[0.150_{-0.069}^{+0.071}\]$
Stellar density from transits, ρ_*,tr (ρ_⊙)	...	${0.1482}_{- 0.0080}^{+ 0.0063}$ $\[0.1482_{-0.0080}^{+0.0063}\]$	...	...
Stellar radius^d, R_*,tr (R_⊙)	...	${2.019}_{- 0.031}^{+ 0.038}$ $\[2.019_{-0.031}^{+0.038}\]$	...	...
Barycentric RV_ELODIE (km s⁻¹)	$U$ $\[\mathcal{U}\]$ (−30.0, −28.5)	−29.288 ± 0.011	−29.312 ± 0.003	−29.3643 ± 0.0045
RV_HRS offset (km s⁻¹)	$U$ $\[\mathcal{U}\]$ (−0.5, 0.5)	−0.020 ± 0.009	...	...
Barycentric RV_HARPS-N (km s⁻¹)	$U$ $\[\mathcal{U}\]$ (−30.0, −28.5)	−29.177 ± 0.008	...	...
RV jitter ln σ_{jitter,ELODIE} (ln km s⁻¹)	$U$ $\[\mathcal{U}\]$ (−15, 0)	$- {4.29}_{- 0.19}^{+ 0.18}$ $\[-4.29_{-0.19}^{+0.18}\]$	$- {4.19}_{- 0.20}^{+ 0.19}$ $\[-4.19_{-0.20}^{+0.19}\]$	$- {4.23}_{- 0.19}^{+ 0.18}$ $\[-4.23_{-0.19}^{+0.18}\]$
RV jitter in σ_jitter,HRS (ln km s⁻¹)	$U$ $\[\mathcal{U}\]$ (−15, 0)	−4.20 ± 0.14	...	...
RV jitter in σ_{jitter,HARPS-N} (ln km s⁻¹)	$U$ $\[\mathcal{U}\]$ (−15, 0)	$- {4.91}_{- 0.25}^{+ 0.26}$ $\[-4.91_{-0.25}^{+0.26}\]$	...	...
RV jitter σ_{jitter,ELODIE} (km s⁻¹)	...	${0.0137}_{- 0.0027}^{+ 0.0024}$ $\[0.0137_{-0.0027}^{+0.0024}\]$	${0.0152}_{- 0.0027}^{+ 0.0031}$ $\[0.0152_{-0.0027}^{+0.0031}\]$	${0.0145}_{- 0.0025}^{+ 0.0028}$ $\[0.0145_{-0.0025}^{+0.0028}\]$
RV jitter σ_jitter,HRS (km s⁻¹)	...	0.0150 ± 0.0021	...	...
RV jitter σ_{jitter,HARPS-N} (km s⁻¹)	...	${0.0074}_{- 0.0018}^{+ 0.0019}$ $\[0.0074_{-0.0018}^{+0.0019}\]$	...	...

Notes. Priors are given for free parameters of the fit. The derived quantities are those without priors. ^a Given as BJD_TDB – 2450000. ^b Assuming Bond albedo A = 0.3 and emissivity ϵ = 1 (Günther & Daylan 2021). ^c Obtained from the astrometric constraints (Sec. 3.3). ^d Calculated from ρ_*,tr and the stellar mass M_* as a consistency check, not used in calculations.

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