Structure and kinematics of the Taurus star-forming region from Gaia-DR2 and VLBI astrometry

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Volume 630 (October 2019)

A&A, 630 (2019) A137

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Table 3.

Spatial velocity of the Taurus molecular clouds.

Molecular Cloud	Cluster	N	U			V			W			V_space
			(km s⁻¹)			(km s⁻¹)			(km s⁻¹)			(km s⁻¹)
			Mean ± SEM	Median	SD	Mean ± SEM	Median	SD	Mean ± SEM	Median	SD	Mean ± SEM	Median	SD
L 1517, L 1519	1	2	−14.6 ± 0.1	−14.6	0.8	−14.7 ± 0.3	−14.7	0.0	−10.3 ± 0.3	−10.3	0.2	23.2 ± 0.4	23.2	0.5
L 1544	4	2	−17.6 ± 0.1	−17.6	0.4	−12.3 ± 0.2	−12.3	0.9	−8.9 ± 0.2	−8.9	0.3	23.2 ± 0.3	23.2	0.7
L 1495 NW	6	0
L 1495	7	25	−16.1 ± 0.2	−15.9	1.1	−12.2 ± 0.2	−12.2	0.8	−10.8 ± 0.1	−10.8	0.5	23.0 ± 0.2	22.9	0.9
B 213, B 216	8	8	−17.9 ± 0.2	−18.0	0.5	−13.2 ± 0.2	−13.3	0.6	−7.0 ± 0.2	−7.1	0.5	23.4 ± 0.2	23.4	0.4
B 215	9	2	−16.6 ± 0.2	−16.6	0.3	−10.5 ± 0.3	−10.5	0.0	−10.3 ± 0.3	−10.3	0.0	22.2 ± 0.5	22.2	0.2
Heiles Cloud 2	14	3	−15.7 ± 0.2	−15.6	0.4	−12.3 ± 0.2	−12.4	0.4	−9.1 ± 0.2	−9.0	0.3	21.9 ± 0.2	21.8	0.3
Heiles Cloud 2	15	5	−15.4 ± 0.4	−15.4	0.9	−10.8 ± 0.2	−10.5	0.5	−9.2 ± 0.1	−9.3	0.3	20.9 ± 0.3	20.9	0.7
L 1535, L 1529, L 1531, L 1524	16	10	−16.1 ± 0.3	−15.9	1.1	−11.2 ± 0.2	−11.1	0.5	−9.5 ± 0.1	−9.6	0.2	21.8 ± 0.2	21.7	0.8
L 1536	18	14	−16.4 ± 0.3	−16.4	1.1	−13.9 ± 0.3	−13.7	0.9	−6.8 ± 0.2	−6.9	0.8	22.6 ± 0.2	22.3	0.9
T Tau cloud	19	1	−18.0 ± 0.2	−18.0		−8.0 ± 0.6	−8.0		−8.0 ± 0.6	−8.0		21.3 ± 0.6	21.3
L 1551	20	12	−15.7 ± 0.5	−16.1	1.6	−15.0 ± 0.3	−14.9	0.9	−7.3 ± 0.3	−7.5	0.9	22.9 ± 0.5	23.6	1.6
L 1558	21	0

Taurus (complex)	All	92	−16.2 ± 0.1	−16.2	1.3	−12.8 ± 0.2	−12.7	1.6	−8.9 ± 0.2	−9.0	1.7	22.5 ± 0.1	22.6	1.2

Notes. We provide for each cloud its identifier, corresponding cluster in the HMAC analysis (see Sect. 4), number of stars with measured radial velocity, mean, standard error of the mean (SEM), median, and standard deviation of the Galactic UVW velocity components (not corrected for the solar motion). The standard deviation value given in the table represents the difference between the individual measurements when the molecular cloud has only two representative stars.

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