Precise characterisation of HD 15337 with CHEOPS: A laboratory for planet formation and evolution

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Volume 686 (June 2024)

A&A, 686 (2024) A282

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Table 3

HD 15337 system parameters from the joint fit of transits and RVs.

Parameters	Derived value
Model stellar parameters
ρ_★ (ρ_⊙)	${1.334}_{- 0.079}^{+ 0.075}$ $1.334_{ - 0.079}^{ + 0.075}$
u_1,TESS	${0.4761}_{- 0.0012}^{+ 0.0015}$ $0.4761_{ - 0.0012}^{ + 0.0015}$
u_2,TESS	${0.1219}_{- 0.0027}^{+ 0.0024}$ $0.1219_{ - 0.0027}^{ + 0.0024}$
u_1,CHEOPS	${0.6198}_{- 0.0012}^{+ 0.0013}$ $0.6198_{ - 0.0012}^{ + 0.0013}$
u_2,CHEOPS	${0.0696}_{- 0.0019}^{+ 0.0018}$ $0.0696_{ - 0.0019}^{ + 0.0018}$
υ₀ (km s⁻¹)	$- {3.8292}_{- 0.0042}^{+ 0.0033}$ $- 3.8292_{ - 0.0042}^{ + 0.0033}$

Derived stellar parameters
M_★ (M_⊙)	0.829 ± 0.038
R_★ (R_⊙)	0.855 ± 0.008
T_eff (K)	5131 ± 74

Model parameters of HD 15337 b
R_b/R_★	${0.01898}_{- 0.00026}^{+ 0.00030}$ $0.01898_{ - 0.00026}^{ + 0.00030}$
P_b (days)	${4.7559804}_{- 0.0000037}^{+ 0.0000062}$ $4.7559804_{ - 0.0000037}^{ + 0.0000062}$
T_0,b (BJD)	${2458411.4623}_{- 0.0013}^{+ 0.0008}$ $2458411.4623_{ - 0.0013}^{ + 0.0008}$
e_b cos ω_b	${0.014}_{- 0.042}^{+ 0.047}$ $0.014_{ - 0.042}^{ + 0.047}$
e_b sin ω_b	${0.043}_{- 0.014}^{+ 0.012}$ $0.043_{ - 0.014}^{ + 0.012}$
cos i_b	${0.0123}_{- 0.0083}^{+ 0.0100}$ $0.0123_{ - 0.0083}^{ + 0.0100}$
K_b (km s⁻¹)	0.00282 ± 0.00015

Derived parameters of HD 15337 b
i (º)	${89.30}_{- 0.57}^{+ 0.48}$ $89.30_{ - 0.57}^{ + 0.48}$
e	${0.058}_{- 0.016}^{+ 0.022}$ $0.058_{ - 0.016}^{ + 0.022}$
ω(º)	${71.62}_{- 40.30}^{+ 52.51}$ $71.62_{ - 40.30}^{ + 52.51}$
R_b (R_⊕)	${1.770}_{- 0.030}^{+ 0.032}$ $1.770_{ - 0.030}^{ + 0.032}$
M_b (M_⊕)	${6.519}_{- 0.400}^{+ 0.409}$ $6.519_{ - 0.400}^{ + 0.409}$
ρ_b (g cm⁻³)	${6.458}_{- 0.510}^{+ 0.518}$ $6.458_{ - 0.510}^{ + 0.518}$

Model parameters of HD 15337 c
R_c/R_★	${0.02707}_{- 0.00077}^{+ 0.00091}$ $0.02707_{ - 0.00077}^{ + 0.00091}$
P_c (days)	${17.180546}_{- 0.000026}^{+ 0.000021}$ $17.180546_{ - 0.000026}^{ + 0.000021}$
T_0,c (BJD)	${2458414.55162}_{- 0.0014}^{+ 0.0015}$ $2458414.55162_{ - 0.0014}^{ + 0.0015}$
e_c cos ω_c	${0.017}_{- 0.089}^{+ 0.082}$ $0.017_{ - 0.089}^{ + 0.082}$
e_c sin ω_c	${0.048}_{- 0.055}^{+ 0.053}$ $0.048_{ - 0.055}^{ + 0.053}$
cos i_c	${0.0278}_{- 0.0013}^{+ 0.0012}$ $0.0278_{ - 0.0013}^{ + 0.0012}$
K_c (km s⁻¹)	${0.00192}_{- 0.00032}^{+ 0.00036}$ $0.00192_{ - 0.00032}^{ + 0.00036}$

Derived parameters of HD 15337 c
i(^º)	88.41 ± 0.07
e	${0.096}_{- 0.045}^{+ 0.059}$ $0.096_{ - 0.045}^{ + 0.059}$
ω(^º)	${56.63}_{- 63.30}^{+ 77.89}$ $56.63_{ - 63.30}^{ + 77.89}$
R_c (R_⊕)	${2.526}_{- 0.075}^{+ 0.086}$ $2.526_{ - 0.075}^{ + 0.086}$
M_c (M_⊕)	${6.792}_{- 1.143}^{+ 1.302}$ $6.792_{ - 1.143}^{ + 1.302}$
ρ_c (g cm⁻³)	${2.303}_{- 0.414}^{+ 0.505}$ $2.303_{ - 0.414}^{ + 0.505}$

Additional model parameters
ΔRV_{HARPS_1} (km s⁻¹)	${0.0187}_{- 0.0019}^{+ 0.0020}$ $0.0187_{ - 0.0019}^{ + 0.0020}$
ΔRV_PFS (km s⁻¹)	3.8137 ± 0.0021
P_sin (days)	$19557_{- 2612}^{+ 3425}$ $19557_{ - 2612}^{ + 3425}$
K_sin (km s⁻¹)	${0.0177}_{- 0.0038}^{+ 0.0044}$ $0.0177_{ - 0.0038}^{ + 0.0044}$

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