A fast method for deriving relative small-scale magnetic field variations from high-resolution spectroscopy

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Volume 708 (April 2026)

A&A, 708 (2026) A207

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Table B.2

GP hyper-parameters obtained for EV Lac and DS Leo from Narval/ESPaDOnS spectra.

	Value	Prior
GP fit for EV Lac
μ (kG)	${0.02}_{- 0.06}^{+ 0.06}$ $Mathematical equation: $0.02^{+0.06}_{-0.06}$$	U(−10, 10)
σ (kG)	${0.08}_{- 0.01}^{+ 0.01}$ $Mathematical equation: $0.08^{+0.01}_{-0.01}$$	U(0, 1000)
α (kG)	${0.19}_{- 0.03}^{+ 0.05}$ $Mathematical equation: $0.19^{+0.05}_{-0.03}$$	U(0, 100)
l (d)	$266_{- 87}^{+ 91}$ $Mathematical equation: $266^{+91}_{-87}$$	U(100, 800)
β	${0.44}_{- 0.14}^{+ 0.16}$ $Mathematical equation: $0.44^{+0.16}_{-0.14}$$	U(0, 10)
P_rot (d)	${4.367}_{- 0.011}^{+ 0.023}$ $Mathematical equation: $4.367^{+0.023}_{-0.011}$$	U(0, 10)
$χ_{r}^{2}$ $Mathematical equation: $\chi^2_r$$	3.84
RMS	0.06 (kG)

GP fit for DS Leo
μ (kG)	${0.05}_{- 0.04}^{+ 0.04}$ $Mathematical equation: $0.05^{+0.04}_{-0.04}$$	U(−5, 5)
σ (kG)	${0.00}_{- 0.00}^{+ 0.00}$ $Mathematical equation: $0.00^{+0.00}_{-0.00}$$	U(0, 1000)
α (kG)	${0.10}_{- 0.02}^{+ 0.04}$ $Mathematical equation: $0.10^{+0.04}_{-0.02}$$	U(0, 10)
l (d)	$80_{- 23}^{+ 29}$ $Mathematical equation: $80^{+29}_{-23}$$	U(30, 500)
β	${0.79}_{- 0.58}^{+ 0.83}$ $Mathematical equation: $0.79^{+0.83}_{-0.58}$$	U(0, 20)
P_rot (d)	${14.109}_{- 0.421}^{+ 0.406}$ $Mathematical equation: $14.109^{+0.406}_{-0.421}$$	U(5, 20)
$χ_{r}^{2}$ $Mathematical equation: $\chi^2_r$$	0.36
RMS	0.01 (kG)

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