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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