Characterising planetary systems with SPIRou: Questions about the magnetic cycle of 55 Cnc A and two new planets around B

Open Access

Table C.1

Best-fit parameters of six Keplerian signals modelled in the time series of 55 Cnc A.

Parameter	Prior	Posterior
P_e (d)	𝒩(0.73654,0.001)	0.736546 ± 1e – 06
Tconj_e	𝒩(2455500.25, 0.01)	2455500.2546 ± 0.005
e_e	< 1	${0.01}_{- 0.01}^{+ 0.02}$ $0.01_{ - 0.01}^{ + 0.02}$
ω_e (rad)		$- {0.1}_{- 2.3}^{+ 1.8}$ $- 0.1_{ - 2.3}^{ + 1.8}$
K_e (m s⁻¹)	𝒥(0.01, 20)	6.55 ± 0.21
a_e (au)		0.016 ± 0.0003
m_esini (M_⊕)		9.35 ± 0.44

P_b (d)	𝒩(14.6515,0.001)	14.651552 ± 3.6e – 05
Tconj_b	𝒩(2455495.5, 0.1)	${2455495.595}_{- 0.015}^{+ 0.012}$ $2455495.595_{ - 0.015}^{ + 0.012}$
e_b	< 1	${0.0029}_{- 0.002}^{+ 0.0027}$ $0.0029_{ - 0.002}^{ + 0.0027}$
ω_b (rad)		${0.41}_{- 1.0}^{+ 0.97}$ $0.41_{ - 1.0}^{ + 0.97}$
K_b (m s⁻¹)	𝒥(0.01, 150)	71.5 ± 0.22
a_b (au)		0.118 ± 0.002
m_bsini (M_⊕)		276 ± 9

P_c (d)	𝒩(44.39,0.1)	44.3936 ± 0.0024
Tconj_c	𝒩(2455491, 2)	2455491.23 ± 0.34
e_c	< 1	0.088 ± 0.23
ω_c (rad)		0.54 ± 0.24
K_c (m s⁻¹)	𝒥(0.01, 50)	10.17 ± 0.22
a_c (au)		0.247 ± 0.004
m_csini (M_⊕)		56.6±2.2

Pf (d)	𝒩(260.59,2)	260.58 ± 0.15
Tconj_f	𝒩(2455237, 15)	2455236.4 ± 2.6
ef	< 1	${0.063}_{- 0.043}^{+ 0.048}$ $0.063_{ - 0.043}^{ + 0.048}$
ωf (rad)		${1.75}_{- 0.44}^{+ 0.79}$ $1.75_{ - 0.44}^{ + 0.79}$
Kf (m s⁻¹)	𝒥(0.01, 50)	4.83 ± 0.22
af (au)		0.802±0.014

m_fsini (M_⊕)		48.5 ± 2.8
P_d (d)	𝒩(4774,100)	${4799.0}_{- 15.0}^{+ 4.9}$ $4799.0_{ - 15.0}^{ + 4.9}$
Tconj_d	𝒩(2451558, 100)	${2451517.8}_{- 3.5}^{+ 20.0}$ $2451517.8_{ - 3.5}^{ + 20.0}$
e_d	< 1	0.0913 ± 0.0067
ω_d (rad)		−1.57 ± 0.04
K_d (m s⁻¹)	𝒥(0.01, 100)	45.63 ± 0.45

a_d (au)		5.60 ± 0.10
m_dsini (M_Jup)		3.82 ± 0.13
P_k6 (d)	𝒩(3832,100)	${3827.1}_{- 6.4}^{+ 9.3}$ $3827.1_{ - 6.4}^{ + 9.3}$
Tconj_k6	𝒩(2450863, 300)	${2450841.5}_{- 5.8}^{+ 12.0}$ $2450841.5_{ - 5.8}^{ + 12.0}$
e_k6	< 1	0.35 ± 0.02
ω_k6 (rad)		−1.66 ± 0.03
K_k6 (m s⁻¹)	𝒥(0.01, 50)	13.06 ± 0.48
γ_Keck−post (m s⁻¹)	-	−21.8 ± 1.1
γ_Keck−pre (m s⁻¹)	-	−23.07 ± 0.34
γ_APF (m s⁻¹)	-	9.56 ± 0.58
γ_Tull (m s⁻¹)	-	−22568.72 ± 0.58
γ_SPIRou (m s⁻¹)	-	27929.0 ± 1.2
γ_Hamilton (m s⁻¹)	-	5.91 ± 0.58
$\dot{γ} ({ms}^{- 1} d^{- 1})$ $\dot \gamma \left( {{\rm{m}}{{\rm{s}}^{ - 1}}{{\rm{d}}^{ - 1}}} \right)$	-	0.00232 ± 0.00017
σ_Keck−post (m s⁻¹)	𝒥(0.01, 10)	3.53 ± 0.77
σ_Keck−pre (m s⁻¹)	𝒥(0.01, 10)	3.72 ± 0.24
σ_APF (m s⁻¹)	𝒥(0.01, 10)	3.22 ± 0.28
σ_Tull (m s⁻¹)	𝒥(0.01, 10)	4.14 ± 0.40
σ_SPIRou (m s⁻¹)	𝒥(0.01, 10)	2.94 ± 0.24
σ_Hamilton (m s⁻¹)	𝒥(0.01, 10)	6.49 ± 0.34

Notes. k6 stands for the sixth Keplerian signal. 𝒥 stands for a Jeffreys prior, and 𝒩 for a normal prior.

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