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Table 2

Confirmed GMFs in the fourth Galactic quadrant.

Filament ID l b θ v ini , v LSR , v end d kin d d ext L ⟨ ∇v R gal z
GMF [°] [°] [°] [km s-1] [kpc] [kpc] [pc] [km s-1 kpc-1] [pc] [pc]

307.2–305.4 [307.4,304.7] [–0.3,0.6] 3.1 –29, –35, –39 3.1 ± 0.7 5.7 ± 0.9 168 59 7.2 20
309.5–308.7 [309.6,308.6] [–0.7,0.7] 1.5 –41, –43, –47 3.7 ± 0.7 4.7 ± 0.3 97 62 6.8 25
319.0–318.7 [319.0,317.3] [–0.8,0.2] 2.6 –35, –40, –44 2.8 ± 0.4 4.9 ± 0.4 73 123 6.7 25
324.5–321.4 [324.3,321.4] [–0.3,0.2] 3.1 –32, –32, –32 2.2 ± 0.4 c 119 0 6.9 7
324.5–321.4ba [322.7,321.4] [–0.2,0.2] 1.0 –32, –32, –32 2.2 ± 0.4 2.9 ± 0.3 c 38 0 6.9 21
335.6–333.6a [335.8,332.2] [0.0,–0.6] 2.0 –46, –50, –53 3.4 ± 0.3 4.5 ± 0.5 119 59 5.7 7
335.6–333.6b [332.8,331.6] [–0.2,–0.2] 1.4 –48, –50, –51 3.3 ± 0.3 5.8 ± 0.5 81 39 5.8 13
341.9–337.1 [342.2,340.2] [–0.1,–0.2] 2.1 –43, –44, –48 3.5 ± 0.3 5.1 ± 0.5 128 31 5.3 7
343.2–341.7 [342.8,341.7] [0.0,0.5] 1.5 –43, –41, –41 3.4 ± 0.3 4.9 ± 0.3 89 22 5.3 33
358.9–357.4 [358.1,357.4] [–0.4,–0.3] 1.6 5, 7, 8 b 2.9 ± 0.3 81 37 5.6 3

Notes. Column 1: GMF identification; Cols. 2–3: galactic latitude and longitude ranges of the GMFs; Col. 4: angular length of the filament from end to end; Col. 5: vini and vend represent the velocity centroid of the 13CO emission at the ends of the filament. vLSR is the velocity centroid of the 13CO emission along the entire GMF. This value is used to estimate the kinematic distance to the GMF; Col. 6: kinematic distances and uncertainties, obtained from the Galactic model of Reid et al. (2014); Col. 7: distances obtained from dust extinction models (Marshall et al. 2009). The distances were obtained as the mean of all the counterparts in the catalog (Marshall et al. 2009), overlapping the GMFs. The uncertainties show the standard deviation.; Col. 8: projected length of the filaments; Col. 9: projected velocity gradient of the filaments, obtained as the ratio (vendvini)/length; Col. 10: galactrocentric radius; Col. 11: mean height above the Galactic midplane in the middle of the filament.

(a)

Most conservative definition of GMF324.5-321.4 (See Sect. A.4).

(b)

We avoid the use of kinematic distance in this GMF since it lies in the Galactic center region.

(c)

No Marshall et al. (2009) counterparts in this filament.

(d)

We have used the kinematic distances to the sources, with the exception of GMF 358.9-357.4, for which we have used the extinction-based distance estimate.

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