2022ApJ...928...17S

Query : 2022ApJ...928...17S

2022ApJ...928...17S - Astrophys. J., 928, 17-17 (2022/March-3)

Diagnosing Triggered Star Formation in the Galactic H II region Sh 2-142.

SHARMA T., CHEN W.P., PANWAR N., SUN Y. and GAO Y.

Abstract (from CDS):

Stars are formed by gravitational collapse, spontaneously or, in some cases under the constructive influence of nearby massive stars, out of molecular cloud cores. Here we present an observational diagnosis of such triggered formation processes in the prominent H II region Sh 2-142, which is associated with the young star cluster NGC 7380, and with some bright-rimmed clouds as the signpost of photoionization of molecular cloud surfaces. Using near- (2MASS) and mid-infrared (WISE) colors, we identified candidate young stars at different evolutionary stages, including embedded infrared sources having spectral energy distributions indicative of active accretion. We have also used data from our optical observations to be used in SEDs, and from Gaia EDR3 to study the kinematics of young objects. With this young stellar sample, together with the latest CO line emission data (spectral resolution ∼0.16 km s–1, sensitivity ∼0.5 K), a positional and aging sequence relative to the neighboring cloud complex, and to the bright-rimmed clouds, is inferred. The propagating stellar birth may be responsible, at least partially, for the formation of the cluster a few million years ago, and for the ongoing activity now witnessed in the cloud complex.

Abstract Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Star formation - Star forming regions - H II regions - Emission nebulae - Molecular gas - Star clusters - Open star clusters - Young stellar objects - Protostars

Nomenclature: Table 1: [SCP2022] MIR-N (Nos 1-8).

Simbad objects: 67

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Number of rows : 67
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 SA 92- reg 00 55 03.80 +00 47 13.2           ~ 102 0
2 2MASS J22454557+5750522 Y*O 22 45 45.57096 +57 50 52.2096           ~ 1 0
3 2MASS J22454720+5750538 Y*O 22 45 47.2103465202 +57 50 53.924671642           ~ 1 0
4 ZTF J224558.65+575119.7 Y*O 22 45 58.6620071590 +57 51 19.725045034           ~ 3 0
5 2MASS J22460083+5751289 Y*O 22 46 00.8207952281 +57 51 29.021669272           ~ 1 0
6 2MASS J22461381+5754506 Y*O 22 46 13.8263915775 +57 54 50.611198183           ~ 1 0
7 2MASS J22461744+5759242 Y*O 22 46 17.44560 +57 59 24.2268           ~ 1 0
8 2MASS J22463276+5805524 Y*O 22 46 32.7807434250 +58 05 52.461632658           ~ 1 0
9 2MASS J22463424+5759446 Y*O 22 46 34.24392 +57 59 44.6208           ~ 1 0
10 HD 215835 SB* 22 46 54.1107754872 +58 05 03.533752788 8.24 8.85 8.629   8.049 O5.5V((f))+O6V((f)) 260 0
11 2MASS J22465541+5757127 Y*O 22 46 55.3917749775 +57 57 12.707633563           ~ 1 0
12 LS III +57 78 Y*O 22 47 04.8752093688 +58 06 01.914874704 11.11 11.53 11.296   10.767 B1V 17 0
13 2MASS J22470894+5817024 Y*O 22 47 08.9417138979 +58 17 02.467718688           ~ 1 0
14 2MASS J22471183+5808307 Y*O 22 47 11.8502210916 +58 08 30.620139018           ~ 1 0
15 Gaia DR3 2007419099424074752 Y*O 22 47 12.4322344684 +58 02 32.627449375           ~ 1 0
16 2MASS J22471335+5806080 Y*O 22 47 13.3692299483 +58 06 07.923001029           ~ 1 0
17 2MASS J22471435+5806596 Y*O 22 47 14.3647943496 +58 06 59.465451744   16.2 15.506   14.763 ~ 3 0
18 WISEA J224719.97+580122.0 Y*O 22 47 19.9781 +58 01 22.021           ~ 1 0
19 2MASS J22472084+5757203 Y*O 22 47 20.8467432817 +57 57 20.431007919           ~ 2 0
20 [D75b] Em* 22-097 LP* 22 47 22.4032718784 +58 01 21.512901144     14.895   12.766 Ae 12 0
21 NGC 7380 OpC 22 47 23.4 +58 06 55           ~ 198 0
22 Gaia DR3 2007418412237051008 Y*O 22 47 25.1756955823 +58 02 23.119364569           ~ 1 0
23 WISE J224729.44+580519.0 Y*O 22 47 29.44897 +58 05 19.0254           ~ 1 0
24 SH 2-142 HII 22 47 32 +58 02.9           ~ 100 1
25 Gaia DR3 2007419992777147648 Y*O 22 47 34.2051761962 +58 07 47.964619329           ~ 1 0
26 ZTF J224734.39+580525.7 Y*O 22 47 34.4006409788 +58 05 25.851561314           ~ 3 0
27 ZTF J224735.73+580912.3 LP* 22 47 35.7427498008 +58 09 12.280478040   16.56 15.892   15.008 ~ 8 0
28 2MASS J22473590+5804330 Y*O 22 47 35.9275277088 +58 04 32.975346252     16.713   15.134 ~ 4 0
29 2MASS J22473705+5758207 Y*O 22 47 37.0579178205 +57 58 20.826554499           ~ 1 0
30 2MASS J22473978+5808313 Y*O 22 47 39.7969001064 +58 08 31.243667028     17.966   15.827 ~ 4 0
31 UCAC4 741-086760 Be* 22 47 40.1198644464 +58 09 03.661770384     13.678 13.517 12.702 B1-3Ve 8 0
32 2MASS J22474125+5757277 Y*O 22 47 41.2699602031 +57 57 27.814735018           ~ 2 0
33 2MASS J22474169+5811243 Y*O 22 47 41.6820386773 +58 11 24.319091094           ~ 1 0
34 2MASS J22474258+5808130 Y*O 22 47 42.58128 +58 08 13.0128           ~ 1 0
35 2MASS J22474344+5805256 Y*O 22 47 43.4650125792 +58 05 25.663177932           ~ 3 0
36 2MASS J22474357+5819412 Y*O 22 47 43.57680 +58 19 41.2104           ~ 1 0
37 2MASS J22474453+5803541 Y*O 22 47 44.5431681072 +58 03 54.277510356           ~ 3 0
38 2MASS J22474526+5807333 Y*O 22 47 45.2598472543 +58 07 33.310888295           ~ 1 0
39 2MASS J22474598+5810106 Y*O 22 47 45.9940392480 +58 10 10.643937175           ~ 1 0
40 Gaia DR3 2007424627039547904 Y*O 22 47 46.0865986917 +58 11 06.775885730           ~ 1 0
41 2MASS J22474629+5807508 Y*O 22 47 46.29672 +58 07 50.8332           ~ 1 0
42 [OSP2002] BRC 43 4 Y*O 22 47 46.4013673124 +58 04 01.235619001           ~ 3 0
43 Gaia DR2 2007419855346026752 Y*O 22 47 47.9034431038 +58 07 27.304994613           ~ 4 0
44 2MASS J22474819+5804255 Y*O 22 47 48.1868507568 +58 04 25.603217652           ~ 3 0
45 2MASS J22474872+5806477 Y*O 22 47 48.7430552768 +58 06 47.777160953           ~ 1 0
46 JCMTSF J224749.3+580252 Cld 22 47 48.8 +58 02 50           ~ 15 0
47 2MASS J22474893+5807563 Y*O 22 47 48.93408 +58 07 56.3664           ~ 1 0
48 Gaia DR3 2007418927633127936 Y*O 22 47 49.2510872300 +58 04 50.944846485           ~ 1 0
49 2MASS J22475002+5759109 Y*O 22 47 50.0389553793 +57 59 10.916250387           ~ 1 0
50 ZTF J224750.61+581138.0 Y*O 22 47 50.6141384136 +58 11 37.969039748           ~ 3 0
51 Gaia DR3 2007424562622310400 Y*O 22 47 52.4295271932 +58 10 23.948668170           ~ 1 0
52 2MASS J22475268+5807528 Y*O 22 47 52.68120 +58 07 52.8240           ~ 1 0
53 [OSP2002] BRC 43 7 Y*O 22 47 55.07 +58 03 22.8           ~ 3 0
54 Gaia DR2 2007421642052396672 Y*O 22 47 55.2538352688 +58 09 59.447928695           ~ 2 0
55 2MASS J22475543+5809380 Y*O 22 47 55.43976 +58 09 38.0196           ~ 1 0
56 Gaia DR3 2007371747402090752 Y*O 22 47 56.4027670887 +58 03 17.687090498           ~ 1 0
57 2MASS J22480022+5802414 Y*O 22 48 00.2333927784 +58 02 41.704809540           ~ 3 0
58 Gaia DR3 2007371678682606208 Y*O 22 48 00.3833790396 +58 02 28.873530124           ~ 1 0
59 2MASS J22480370+5805120 Y*O 22 48 03.7143296856 +58 05 12.135633108           ~ 3 0
60 2MASS J22480474+5808330 Y*O 22 48 04.7278574887 +58 08 33.760010594           ~ 1 0
61 2MASS J22480653+5804378 Y*O 22 48 06.5473254768 +58 04 37.866579780     17.957   15.637 ~ 5 0
62 2MASS J22481045+5804112 Y*O 22 48 10.4643852408 +58 04 11.365237884           ~ 3 0
63 2MASS J22481091+5809084 Y*O 22 48 10.9807187516 +58 09 08.317468464           ~ 1 0
64 2MASS J22481153+5803248 Y*O 22 48 11.5476721320 +58 03 24.884359200           ~ 3 0
65 2MASS J22482349+5812021 Y*O 22 48 23.5236296913 +58 12 02.149524449           ~ 1 0
66 2MASS J22482715+5821123 Y*O 22 48 27.15648 +58 21 12.3408           ~ 1 0
67 2MASS J22495520+5811497 Y*O 22 49 55.2282884958 +58 11 49.800955075           ~ 2 0

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