An active region filament studied simultaneously in the chromosphere and photosphere - II. Doppler velocities

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Table 3

Mean Doppler velocities ( ⟨ v ⟩ ), of all available maps for both days, calculated inside the contours, where the inferred LOS inclinations are between 75° < γ < 105°, i.e., along the PIL.

			Spine			Orphan penumbrae
Day	Time range	Inversion	⟨ v ⟩	σ	#	⟨ v ⟩	σ	#
	(UT)		(km s^-1)	(km s^-1)	points	(km s^-1)	(km s^-1)	points

		Si	−0.123	0.725	2097
3 Jul.	13:53–14:14	Si^mag^†	−0.134	0.546	1974	No orphan penumbrae
		He	−0.266	0.574	146

		Si	−0.010	0.542	1114
3 Jul.	14:39–15:01	Si^mag	−0.163	0.406	1088	No orphan penumbrae
		He	−0.216	0.521	94

		Si	−0.011	0.424	1019	+ 0.086	0.383	831
5 Jul.	7:36–8:05	Si^mag	−0.190	0.333	1018	−0.250	0.329	825
		He	+ 0.808	0.566	42	+ 0.547	1.303	54

		Si	+ 0.108	0.326	870	+ 0.026	0.353	1009
5 Jul.	8:08–8:28	Si^mag	−0.144	0.263	870	−0.241	0.368	997
		He	+ 0.884	0.604	42	+ 0.346	0.951	59

		Si	−0.011	0.186	780	+ 0.079	0.317	1127
5 Jul.	8:42–9:01	Si^mag	−0.237	0.288	780	−0.243	0.353	1106
		He	+ 0.954	0.564	36	+ 0.427	1.002	63

		Si	−0.040	0.267	760	+ 0.110	0.322	1023
5 Jul.	9:02–9:21	Si^mag	−0.291	0.246	760	−0.229	0.336	1006
		He	+ 0.649	0.464	37	+ 0.183	0.622	62

		Si	+ 0.045	0.263	569	+ 0.021	0.332	1497
5 Jul.	9:33–9:52	Si^mag	−0.085	0.248	569	−0.209	0.400	1457
		He	+ 1.013	0.645	22	+ 0.366	0.826	102

		Si	−0.127	0.282	755	+ 0.021	0.314	1292
5 Jul.	13:39–13:58	Si^mag	−0.063	0.248	755	−0.283	0.419	1273
		He	+ 0.779	0.960	41	+ 0.278	0.814	60

		Si	−0.046	0.375	618	+ 0.211	0.301	1257
5 Jul.	14:31–14:51	Si^mag	+ 0.014	0.290	618	−0.099	0.427	1248
		He	+ 1.083	1.009	30	+ 0.271	0.558	75

Notes. We distinguish between two different areas: the filament axis or spine (black contours in Fig. 3) and the orphan penumbral area (green contours). σ stands for the standard deviation and # is the number of pixels in each area selected for the study.

^(†)

Velocities above 2 km s^-1 or below −2 km s^-1 inferred from the “magnetic” Si i inversions (and mostly due to weak Q and U signals) were excluded from the statistics. However, only very few points were affected by this filter (between 9 − 40; and 123 for the first map).

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