Rotational modulation and long-term evolution of the small-scale magnetic fields of M dwarfs observed with SPIRou

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Volume 702 (October 2025)

A&A, 702 (2025) A111

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Table A.5

Same as Table A.1 but for PM J18482+0741.

PM J18482+0741	Value	Prior
GP fit on 〈B〉
μ (kG)	${1.55}_{- 0.11}^{+ 0.11}$ $1.55^{+0.11}_{-0.11}$	𝒰(−10, 10)
σ (kG)	${0.01}_{- 0.01}^{+ 0.02}$ $0.01^{+0.02}_{-0.01}$	𝒰(0, 1000)
α (kG)	${0.15}_{- 0.05}^{+ 0.06}$ $0.15^{+0.06}_{-0.05}$	𝒰(0, 10)
l (d)	$113_{- 31}^{+ 33}$ $113^{+33}_{-31}$	𝒰(10, 500)
β	1.50	Fixed
P_rot (d)	${2.762}_{- 0.007}^{+ 0.009}$ $2.762^{+0.009}_{-0.007}$	G(2.76, 0.60)
χ²_r	0.89
RMS	0.09 (kG)
GP fit on B_ℓ
μ_ℓ (G)	$- {6.20}_{- 91.69}^{+ 92.85}$ $-6.20^{+92.85}_{-91.69}$	𝒰(−1000, 1000)
σ_ℓ (G)	${8.40}_{- 4.10}^{+ 3.30}$ $8.40^{+3.30}_{-4.10}$	𝒰(0, 1000)
α_ℓ (G)	${44.18}_{- 60.46}^{+ 126.91}$ $44.18^{+126.91}_{-60.46}$	𝒰(0, 400)
l_ℓ (d)	$650_{- 261}^{+ 177}$ $650^{+177}_{-261}$	𝒰(10, 1000)
β_ℓ	${0.35}_{- 0.76}^{+ 1.30}$ $0.35^{+1.30}_{-0.76}$	𝒰(0, 5)
P_rot,ℓ (d)	${2.761}_{- 0.001}^{+ 0.001}$ $2.761^{+0.001}_{-0.001}$	𝒰(2, 5)
χ²_{r, ℓ}	1.00
RMS_ℓ	19.64 (G)
GP fit on 〈B〉 and B_ℓ
μ (kG)	${1.55}_{- 0.68}^{+ 0.31}$ $1.55^{+0.31}_{-0.68}$	𝒰(−10, 10)
σ (kG)	${0.01}_{- 0.01}^{+ 0.02}$ $0.01^{+0.02}_{-0.01}$	𝒰(0, 1000)
α (kG)	${0.15}_{- 0.34}^{+ 1.40}$ $0.15^{+1.40}_{-0.34}$	𝒰(0, 5)
l (d)	$112_{- 67}^{+ 100}$ $112^{+100}_{-67}$	𝒰(10, 500)
β	${1.23}_{- 3.43}^{+ 14.47}$ $1.23^{+14.47}_{-3.43}$	𝒰(0, 50)
P_rot (d)	${2.759}_{- 0.002}^{+ 0.002}$ $2.759^{+0.002}_{-0.002}$	𝒰(2, 5)
μ_ℓ (G)	$- {12.02}_{- 59.46}^{+ 56.52}$ $-12.02^{+56.52}_{-59.46}$	𝒰(−1000, 1000)
σ_ℓ (G)	${11.47}_{- 3.48}^{+ 3.06}$ $11.47^{+3.06}_{-3.48}$	𝒰(0, 1000)
α_ℓ (G)	${81.00}_{- 18.59}^{+ 24.94}$ $81.00^{+24.94}_{-18.59}$	𝒰(0, 400)
l_ℓ (d)	300	Fixed
β_ℓ	1.00	Fixed
χ²_r	0.85
χ²_{r, ℓ}	1.17
RMS	0.09 (kG)
RMS_ℓ	20.50 (G)
GP fit on dTemp
μ_dTemp (K)	$- {2.36}_{- 3.80}^{+ 3.54}$ $-2.36^{+3.54}_{-3.80}$	𝒰(−50, 50)
σ_dTemp (K)	${0.37}_{- 0.59}^{+ 0.56}$ $0.37^{+0.56}_{-0.59}$	𝒰(0, 1000)
α_dTemp (K)	${4.11}_{- 1.57}^{+ 3.11}$ $4.11^{+3.11}_{-1.57}$	𝒰(0, 100)
l_dTemp (d)	300	Fixed
β_dTemp	1.50	Fixed
P_{rot, dTemp} (d)	${2.771}_{- 1.216}^{+ 1.426}$ $2.771^{+1.426}_{-1.216}$	𝒰(2, 5)
χ²_{r, dTemp}	0.98
RMS_dTemp	3.16 (K)

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