Long-term monitoring of large-scale magnetic fields across optical and near-infrared domains with ESPaDOnS, Narval, and SPIRou - The cases of EV Lac, DS Leo, and CN Leo

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Volume 686 (June 2024)

A&A, 686 (2024) A66

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Table 2.

Comparison of a constant line against a sine fit for the FWHM phase variations of EV Lac, DS Leo, and CN Leo.

Epoch	Mask	Mean	Mean error	STD	RMS_const	$χ_{r, const}^{2}$ $\chi^2_{r,{\rm const}}$	RMS_sine	$χ_{r, sine}^{2}$ $\chi^2_{r,{\rm sine}}$
		[km s⁻¹]	[km s⁻¹]	[km s⁻¹]	[km s⁻¹]		[km s⁻¹]
EV Lac

2019b	Default	22	0.65	1.68	1.68	6.9	1.45	5.9
	g_eff > 1.2	29	1.12	4.39	4.39	19.7	4.17	19.7
2020b2021a	Default	21	0.44	1.00	1.00	6.2	0.82	4.4
	g_eff > 1.2	28	0.87	2.62	2.62	12.9	2.45	10.7
2021b	Default	21	0.46	0.98	0.98	4.8	0.90	4.5
	g_eff > 1.2	28	0.74	2.57	2.57	13.0	2.44	16.1

DS Leo

2020b2021a	Default	13	0.18	0.29	0.29	2.8	0.16	0.9
	g_eff > 1.2	14	0.21	0.47	0.47	6.2	0.33	2.9
2021b2022a	Default	13	0.18	0.21	0.21	1.5	0.20	1.3
	g_eff > 1.2	14	0.20	0.32	0.32	3.1	0.30	2.7

CN Leo

2019a	Default	15	0.34	1.27	1.27	16.7	1.22	19.7
	g_eff > 1.2	21	1.19	3.73	3.73	19.8	3.44	22.5
2019b2020a	Default	17	0.36	1.41	1.41	19.1	1.35	16.6
	g_eff > 1.2	25	1.57	4.44	4.44	15.3	4.27	13.6
2020b2021a	Default	16	0.37	1.69	1.69	45.8	1.61	39.8
	g_eff > 1.2	22	1.51	5.08	5.08	26.8	4.74	23.1
2021b2022a	Default	17	0.34	1.37	1.37	25.7	1.29	24.7
	g_eff > 1.2	22	1.41	4.94	4.94	16.3	4.65	15.8

Notes. The columns are: 1) subset of the time series, 2) line list used in LSD computation, 3) mean FWHM, 4) mean error bar, 5) standard deviation of the data sets, 6) RMS (root mean square) residual of a constant line fit equal to the average of the data set, 7) reduced χ² of a constant model, 8) RMS residual of a sine fit at the stellar rotation period, and 9) reduced χ² of a sine model.

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