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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