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Table 2

Results of compact source extractions on the ALMA 12 m-only 3.1 mm continuum map.

ID (1) RA Dec Rmajor × Rminor PA S/N Mtot Velocity channel at which Association with
source is detected in N2H+ N2H+ features
[hms] [dms] [′′ × ′′ ] (2), (3) [deg](2) [mJy/beam] (2) [σ] [mJy] (2) [M ] (4) [×106 cm−3] (5) [km s−1]
1 17:20:43.13 −35:47:54.9 2.9 × 2.3 (0.02 pc × 0.02 pc) 1 5.1 ± 0.2 36.4 11.4 31.5 11.1 [−2.2, −1.8] F-2
2 17:20:41.78 −35:48:9.2 2.8 × 1.7 (0.02 pc × 0.01 pc) 10 6.9 ± 0.2 49.2 13.5 13.8 8.1 No N2H+
3 17:20:45.00 −35:46:42.7 1.7 × 0.8 (0.01 pc × 0.01 pc) −33 2.9 ± 0.2 21.0 4.1 11.2 42.5 −1.2 (6)
4 17:20:43.56 −35:47:51.4 2.2 × 1.1 (0.02 pc × 0.01 pc) 36 3.0 ± 0.2 21.4 4.7 12.8 22.6 [−1.4, −1.2] F-2
5 17:20:43.16 −35:47:46.6 1.2 × 0.8 (0.01 pc × 0.01 pc) −8 2.5 ± 0.2 18.2 3.2 8.9 54.3 [−2.6, −2.4],[−2.0, −1.8] F-1
6 17:20:44.66 −35:46:54.3 1.7 × 1.3 (0.01 pc × 0.01 pc) 6 2.4 ± 0.2 17.0 3.5 9.6 19.1 [−3.0, −2.8],[−1.8],[−1.4, −1.2] F-2
7 17:20:44.51 −35:47:0.8 2.0 × 1.1 (0.02 pc × 0.01 pc) −32 2.4 ± 0.2 17.3 3.7 10.1 19.1 −3.8, −2.8 (6) F-1(marginal)/F-3(marginal)
8 17:20:40.42 −35:48:51.1 1.9 × 1.4 (0.02 pc × 0.01 pc) −22 3.0 ± 0.2 21.5 4.7 12.9 18.5 [−2.6, −1.4]
9 17:20:44.48 −35:47:17.1 1.9 × 1.5 (0.02 pc × 0.01 pc) 40 2.7 ± 0.2 19.4 4.3 11.9 14.7 [−2.8, −2.6],[−1.8, −1.2] F-2
10 17:20:39.27 −35:49:16.9 2.1 × 0.9 (0.02 pc × 0.01 pc) 35 3.3 ± 0.2 23.8 5.0 13.7 35.1 [−3.8, −3.0] F-1
11 17:20:41.25 −35:48:18.3 1.5 × 1.0 (0.01 pc × 0.01 pc) −39 2.3 ± 0.2 16.6 3.2 8.7 28.4 [−3.6, −2.6]
12 17:20:39.44 −35:49:2.8 2.4 × 1.4 (0.02 pc × 0.01 pc) −42 3.5 ± 0.2 24.8 6.0 16.6 15.8 [−3.8, −2.4]
13 17:20:39.05 −35:49:20.7 2.4 × 0.9 (0.02 pc × 0.01 pc) 19 1.8 ± 0.2 13.1 2.9 8.1 15.3 −3.8 (6)
14 17:20:45.52 −35:46:33.6 1.7 × 1.5 (0.01 pc × 0.01 pc) −28 1.7 ± 0.2 12.1 2.6 7.1 10.7 [−3.2, −2.8],[−2.2, −2.0], −1.2 F-2
15 (7) 17:20:41.58 −35:48:37.5 1.5 × 1.0 (0.01 pc × 0.01 pc) −23 2.6 ± 0.2 18.3 2.1 7.0 24.4 No N2H+/free−free contamination
16 17:20:43.38 −35:48:47.0 2.3 × 0.9 (0.02 pc × 0.01 pc) −32 4.5 ± 0.2 32.3 7.1 19.6 37.8 No N2H+/Out of main filament
17 17:20:39.39 −35:49:13.7 2.1 × 1.7 (0.02 pc × 0.01 pc) 6 3.9 ± 0.2 28.1 6.6 18.2 17.7 [−3.8, −2.8]
18 17:20:42.35 −35:48:34.2 2.0 × 1.7 (0.02 pc × 0.01 pc) −39 4.8 ± 0.2 34.5 8.1 22.3 21.9 −3.4,[−1.6, −1.4] free−free contamination
19 (7) 17:20:40.97 −35:48:21.2 1.5 × 1.0 (0.01 pc × 0.01 pc) −19 2.0 ± 0.2 13.9 1.8 5.4 18.6 No N2H+
20 17:20:40.66 −35:48:39.4 1.3 × 1.0 (0.01 pc × 0.01 pc) 44 2.1 ± 0.2 15.0 2.8 7.6 31.0 [−3.4, −2.6] F-1
21 (7), (2) 17:20:41.20 −35:48:28.5 1.4 × 0.9 (0.01 pc × 0.01 pc) −33 1.1 ± 0.1 8.1 1.4 3.1 13.4 [−2.4, −1.2] F-1
22 17:20:44.39 −35:47:26.4 2.1 × 1.6 (0.02 pc × 0.01 pc) −2 2.2 ± 0.2 16.0 3.7 10.2 10.7 [−3.8, −3.2], [−1.8, −1.2] F-2
23 17:20:41.65 −35:48:3.1 3.0 × 1.3 (0.02 pc × 0.01 pc) 44 1.7 ± 0.2 12.2 3.2 8.9 7.0 [−3.4, −2.4] F-1
24 17:20:47.61 −35:47:53.7 1.6 × 1.5 (0.01 pc × 0.01 pc) 31 1.2 ± 0.2 8.3 1.7 4.8 8.1 [−3.4, −3.2], −2.0, −1.2 Out of main filament
25 17:20:42.87 −35:49:36.0 1.9 × 0.8 (0.02 pc × 0.01 pc) 34 1.9 ± 0.2 13.7 2.8 7.6 23.9 No N2H+/Out of main filament
26 17:20:42.87 −35:48:6.6 2.0 × 0.2 (0.02 pc × 0.00 pc) 28 1.5 ± 0.2 10.5 2.0 5.6 141.9 [−1.4, −1.2] F-2
27 17:20:38.94 −35:49:5.9 2.1 × 1.0 (0.02 pc × 0.01 pc) −19 1.9 ± 0.2 13.6 2.9 7.9 17.0 [−2.2, −1.6]
28 17:20:41.88 −35:49:1.6 3.4 × 0.9 (0.03 pc × 0.01 pc) −41 2.2 ± 0.2 16.0 4.3 11.9 14.4 No N2H+/Out of main filament
29 (7), (2) 17:20:39.59 −35:48:42.6 1.4 × 0.9 (0.01 pc × 0.01 pc) 15 0.6 ± 0.1 4.5 0.3 1.7 7.4 No N2H+
30 17:20:42.35 −35:49:31.8 1.7 × 1.7 (0.01 pc × 0.01 pc) 1 2.7 ± 0.2 19.1 4.2 11.6 14.6 No N2H+/Out of main filament
31 17:20:44.42 −35:47:21.2 2.2 × 1.5 (0.02 pc × 0.01 pc) 22 2.1 ± 0.2 15.2 3.5 9.7 10.7 −3.8, [−2.0, −1.8] F-2
32 (7), (2) 17:20:44.26 −35:49:14.1 1.4 × 0.9 (0.01 pc × 0.01 pc) 39 3.3 ± 0.1 23.4 1.1 9.0 38.5 No N2H+/Out of main filament
33 (7) 17:20:43.39 −35:47:57.3 1.5 × 1.0 (0.01 pc × 0.01 pc) 42 2.3 ± 0.2 16.4 0.7 6.3 21.9 −1.8 (6) F-2(marginal)
34 17:20:39.27 −35:47:59.3 2.3 × 1.3 (0.02 pc × 0.01 pc) 34 2.0 ± 0.2 14.4 3.4 9.2 10.7 [−3.8, −3.4], [−2.8, −2.6] Out of main filament
35 (7), (2) 17:20:38.34 −35:48:32.4 1.4 × 0.9 (0.01 pc × 0.01 pc) 15 0.9 ± 0.1 6.7 1.2 2.6 11.0 −2.2 (6) Out of main filament
36 17:20:42.92 −35:49:24.7 2.1 × 1.9 (0.02 pc × 0.02 pc) −19 3.8 ± 0.2 27.0 6.7 18.5 14.1 No N2H+/Out of main filament
37 17:20:36.73 −35:48:56.6 1.9 × 1.4 (0.02 pc × 0.01 pc) 38 1.4 ± 0.2 9.9 2.2 6.0 8.4 No N2H+/Out of main filament
38 17:20:43.44 −35:49:6.4 2.2 × 1.8 (0.02 pc × 0.01 pc) −4 1.8 ± 0.2 12.9 3.1 8.7 7.2 No N2H+/Out of main filament
39 17:20:40.25 −35:48:46.7 2.5 × 1.5 (0.02 pc × 0.01 pc) −36 2.3 ± 0.2 16.4 4.0 11.1 10.0 [−2.6, −2.2]
40 17:20:42.82 −35:49:20.4 2.0 × 1.9 (0.02 pc × 0.02 pc) 0 3.4 ± 0.2 24.4 5.9 16.3 13.8 No N2H+/Out of main filament

Notes. (1) ID numbers of 3.1 mm compact sources associated with N2H+ emission in two or more contiguous channels are labeled in bold. (2) Results of the 2D Gaussian fitting on the 12 m+7 m map. For IDs 21, 29, 32, 35, the 12 m map was used since the 3.1 mm continuum emission is not detected with a >3σ on the 12m+7m map. (3)Deconvolved FWHM source diameters along the major and minor axes. (4)We adopted Tdust = 20 K for all sources, except for source ID 2 for which we assumed Tdust = 50 K (see Sect. 3.3.1). (5)Volume-averaged gas density derived assuming spheroidal cores as in Eq. (2). (6) Marginal N2H+ detection since it is detected in only one channel for this source. (7) Deconvolved source size are not obtained since the structure is not resolved. The peak flux was used to estimate the mass.

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