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Table 1

Observational fields and related MDCs.

Field MDCs (Cao21)(a) MDCs (Motte07)(b) RA (J2000) Dec (J2000) Beam(c) (″×″; º)
1 220 N3 20:35:34.6 42:20:08.8 3.3×2.6; −29.0
2 341 N63 20:40:05.4 41:32:13.1 3.1×2.5; −24.0
3 274 584 N6 20:36:07.3 41:39:58.0 4.5×3.1;−69.0
4 725 1919 N10 20:35:52.2 41:36:23.0 4.5×3.1;−69.0
5 248 774(d) 1669 N12 20:36:57.4 42:11:27.0 3.5×3.4; 61.0
6 714 N14 20:37:00.9 41:34:57.0 4.3×3.0; −69.0
7 1267 3188 6479 N24 20:38:04.6 42:39:54.0 3.5×3.3; 61.0
8 698 1179 N56 20:39:16.9 42:16:07.0 3.6×3.3; 58.0
9 532 N58(e) 20:39:25.9 41:20:01.0 3.5×3.4; −11.0
10 801 N65 20:40:28.4 41:57:11.0 4.8×3.2; −72.0
11 684 N68 20:40:33.5 41:59:03.0 4.6×3.1; −71.0
12 4315 4797 N69 20:40:33.7 41:50:59.0 4.5×3.1; −69.0
13 327 619 742(d) NW1 NW2 20:19:39.0 40:56:45.0 4.4×3.0; −63.0
14 640 675 NW5 20:20:30.5 41:21:40.0 3.5×3.0; −70.0
15 839(e) NW12(f) 20:24:14.3 42:11:43.0 3.5×3.0; −70.0
16 310 NW14 20:24:31.7 42:04:23.0 3.6×3.0; −70.0
17 507 753 S7 S8 20:20:38.6 39:38:00.0 4.1×3.0; −80.0
18 798 S10 20:20:44.4 39:35:20.0 4.0×2.9; −75.0
19 874 S15 20:27:14.0 37:22:58.0 3.5×3.1;−61.0
20 1201 1537 S18 S20 20:27:26.7 37:22:45.0 3.5×3.0; −61.0
21 277(𝑔) S26(𝑔) 20:29:24.6 40:11:19.1 3.2×2.6; 54.0
22 723 S29 20:29:58.8 40:15:58.0 3.3×3.0; 87.0
23 509 S30 20:31:12.6 40:03:16.0 3.3×2.9; −87.0
24 351 S32 20:31:20.3 38:57:16.0 3.3×2.9; −86.0
25 1225 S34 20:31:57.8 40:18:30.0 4.7×3.3; −75.0
26 1454 2210 S37 20:32:28.6 40:19:41.5 3.5×3.0; −70.0
27 892 S41 20:32:33.4 40:16:43.0 3.5×3.0; −70.0
28 540 S43 20:32:40.8 38:46:31.0 3.3×2.9; −89.0
29 1460 20:35:00.0 41:34:57.0 5.0×2.9; −69.0
30 608 20:34:00.0 41:22:25.0 4.9×2.9; −68.0
31 302 520 20:35:09.5 41:13:30.0 4.3×3.0; −71.0
32 340 20:32:22.5 41:07:56.0 4.0×3.0; −69.0
33 2976 20:32:17.0 41:09:10.0 4.4×3.0; 86.0
34 214 247 20:30:28.5 41:15:55.0 3.6×3.0; −69.0
35 370 893 20:28:09.4 40:52:50.0 4.0×3.0; −61.0
36 20:28:05.5 40:51:17.0 3.9×3.0; −59.0
37 1112 1231 1244 N30 N32 20:38:36.4 42:37:34.8 3.3×2.6; −29.0

Notes. (a)MDCs from Cao et al. (2021) covered by the field. (b)MDCs in Motte et al. (2007) covered by the field, extracted from 1.2 mm continuum data from IRAM 30-m telescope (with effective angular resolution of ~11″ and spatial resolution of ~0.09 pc). (c)The beams are shown as “major axes × minor axes; position angles”. (d)Dense core 774 and 742 have mass of 25.0 and 19.4 M, slightly lower than 30 M. However, both of them have remarkable NH3 detections in our observations. We therefore took them into the following analysis and do not distinguish them from other MDCs. (e)The mass of N58 could be highly overestimated in Motte et al. (2007) due to the significant contribution of free-free emission in this core. N58 is therefore excluded from the sample in Wang et al. (2022). However, MDC 532 is included in this work as the SED-fitted mass of MDC 532 is 68.6 M, which is still larger than 30 M. (f)NW12 is an interesting isolated core in its parental clump. It is covered by VLA 14A-107 though its mass is lower than 30 M. The mass of MDC 839 extracted by Cao et al. (2021) is also lower than 30 M. (𝑔)S26, also known as AFGL 2591, is excluded from our sample due to its different distance from Cygnux X region, of namely 3.3 kpc (Rygl et al. 2012).

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