2024AJ....168..122P

Query : 2024AJ....168..122P

2024AJ....168..122P - Astron. J., 168, 122 (2024/September-0)

Submillimeter and Mid-Infrared Variability of Young Stellar Objects in the M17SWex Intermediate-mass Star-forming Region.

PARK G., JOHNSTONE D., CONTRERAS PENA C., LEE J.-E., LIU S.-Y., HERCZEG G., MAIRS S., CHEN Z., HATCHELL J., KIM K.-T., KIM M.-R., QIU K., WANG Y.-T., ZHANG X. (The JCMT Transient Team)

Abstract (from CDS):

We present a comprehensive analysis of young stellar object (YSO) variability within the M17 Southwest Extension (M17 SWex), using 3.5 yr of monitoring data from the James Clerk Maxwell Telescope (JCMT) Transient Survey at submillimeter and 9 yr from the NEOWISE mission at mid-infrared (mid-IR). Our study encompasses observations of 147 bright submillimeter peaks identified within our deep JCMT coadded map as well as 156 YSOs in NEOWISE W1 and 179 in W2 that were previously identified in Spitzer surveys. We find three robust submillimeter variables: two are candidate YSOs and one is a likely extragalactic source. At mid-IR wavelengths, our analysis reveals secular and stochastic variability in 47 YSOs, with the highest fraction of secular variability occurring at the earliest evolutionary stage. This is similar to what has previously been observed for low-mass YSO variability within the Gould Belt. However, we observe less overall variability in M17 SWex at both the submillimeter and mid-IR. We suspect that this lower fraction is due to the greater distance to M17 SWex. Our findings showcase the utility of multiwavelength observations to better capture the complex variability phenomena inherent to star formation processes and demonstrate the importance of years-long monitoring of a diverse selection of star-forming environments.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Star formation - Star forming regions - Young stellar objects - Protostars - Pre-main sequence stars - Variable stars - Infrared astronomy - Submillimeter astronomy

VizieR on-line data: <Available at CDS (J/AJ/168/122): tablea1.dat tableb1.dat tableb2.dat>

Simbad objects: 194

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Number of rows : 194
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 M 42 HII 05 35 16.8 -05 23 15           ~ 4411 0
2 NGC 2023 RNe 05 41 37.9 -02 15 52           ~ 657 1
3 2MASS J05463064-0002349 Y*O 05 46 30.645 -00 02 34.97           ~ 41 0
4 IC 2162 HII 06 13 04.1 +17 58 44           ~ 372 2
5 2MASS J18171223-1657310 Y*? 18 17 12.236 -16 57 31.05           ~ 5 0
6 2MASS J18171543-1652041 AB? 18 17 15.439 -16 52 04.19           ~ 3 0
7 SPICY 79255 Y*? 18 17 15.596 -16 56 15.01           ~ 2 0
8 2MASS J18171640-1658411 AB? 18 17 16.400 -16 58 41.15           ~ 4 0
9 2MASS J18171704-1659394 Y*? 18 17 17.048 -16 59 39.46           ~ 3 0
10 2MASS J18172146-1652436 AB? 18 17 21.464 -16 52 43.64           ~ 3 0
11 2MASS J18172257-1659033 Y*O 18 17 22.579 -16 59 03.36           ~ 3 0
12 2MASS J18172554-1704067 Y*? 18 17 25.548 -17 04 06.77           ~ 3 0
13 SPICY 79425 Or* 18 17 25.693 -17 02 11.94           ~ 5 0
14 SPICY 79441 Y*? 18 17 26.806 -17 04 12.94           ~ 3 0
15 2MASS J18172752-1701381 Y*? 18 17 27.527 -17 01 38.18           ~ 4 0
16 2MASS J18172909-1701332 Y*? 18 17 29.09712 -17 01 33.2400           ~ 2 0
17 2MASS J18173353-1650437 Y*? 18 17 33.5421468120 -16 50 43.799901396           ~ 3 0
18 2MASS J18173413-1702043 Y*? 18 17 34.1394608928 -17 02 04.419518136           ~ 4 0
19 2MASS J18173594-1701314 AB? 18 17 35.942 -17 01 31.42           ~ 4 0
20 2MASS J18173970-1705362 Y*? 18 17 39.7045481496 -17 05 36.288022848           ~ 4 0
21 2MASS J18174284-1641267 AB? 18 17 42.847 -16 41 26.79           ~ 3 0
22 SPICY 79718 Y*? 18 17 48.299 -17 00 07.54           ~ 4 0
23 2MASS J18174903-1659274 Y*? 18 17 49.039 -16 59 27.50           ~ 3 0
24 2MASS J18175062-1659572 Y*? 18 17 50.623 -16 59 57.22           ~ 2 0
25 2MASS J18175202-1655213 Y*? 18 17 52.02792 -16 55 21.3312           ~ 2 0
26 2MASS J18175481-1655242 Y*? 18 17 54.8185447032 -16 55 24.149404236           ~ 3 0
27 SPICY 79839 Y*O 18 17 55.1483055936 -16 58 28.607219400           ~ 4 0
28 SPICY 79859 Y*? 18 17 56.771 -16 52 22.84           ~ 4 0
29 2MASS J18175738-1659211 Y*? 18 17 57.3922479408 -16 59 21.031692108           ~ 4 0
30 SPICY 79882 Y*? 18 17 58.350 -17 06 30.72           ~ 2 0
31 2MASS J18175838-1702401 Y*? 18 17 58.386 -17 02 40.15           ~ 3 0
32 2MASS J18175852-1702535 Y*? 18 17 58.5291737328 -17 02 53.463655068           ~ 3 0
33 SPICY 79887 Y*? 18 17 58.557 -17 06 32.88           ~ 1 0
34 2MASS J18180108-1657054 Y*? 18 18 01.089 -16 57 05.48           ~ 3 0
35 2MASS J18180115-1653372 Y*? 18 18 01.1651873664 -16 53 36.785012460           ~ 4 0
36 SPICY 79954 Y*? 18 18 02.814 -16 53 20.08           ~ 3 0
37 2MASS J18180287-1652249 Y*? 18 18 02.8782382200 -16 52 24.903349680           ~ 3 0
38 NVSS J181802-170542 Rad 18 18 02.90252 -17 05 40.9018           ~ 3 0
39 AGAL G014.131-00.522 Y*O 18 18 04 -16 55.0           ~ 13 0
40 2MASS J18180511-1653425 AB? 18 18 05.119 -16 53 42.58           ~ 3 0
41 2MASS J18180605-1653456 Y*? 18 18 06.0535555440 -16 53 45.523386348           ~ 3 0
42 2MASS J18180631-1652139 Y*? 18 18 06.317 -16 52 13.92           ~ 3 0
43 2MASS J18180648-1654490 Y*? 18 18 06.4850388744 -16 54 49.001063976           ~ 3 0
44 2MASS J18180650-1656355 Y*? 18 18 06.5015352408 -16 56 35.436354000           ~ 3 0
45 2MASS J18180681-1651197 Y*? 18 18 06.817 -16 51 19.70           ~ 4 0
46 SPICY 80044 Y*? 18 18 07.660 -16 57 11.86           ~ 4 0
47 2MASS J18180905-1658380 Y*? 18 18 09.059 -16 58 38.01           ~ 4 0
48 2MASS J18180913-1637415 Y*? 18 18 09.13728 -16 37 41.5092           ~ 2 0
49 2MASS J18180953-1650094 Y*? 18 18 09.534 -16 50 09.45           ~ 3 0
50 2MASS J18180980-1652117 Y*? 18 18 09.808 -16 52 11.78           ~ 4 0
51 SPICY 80111 Y*? 18 18 10.8082250256 -16 49 12.644997312           ~ 3 0
52 2MASS J18181088-1649167 Y*? 18 18 10.883 -16 49 16.78           ~ 3 0
53 SPICY 80128 Y*? 18 18 11.537 -16 51 37.11           ~ 4 0
54 2MASS J18181156-1659289 AB? 18 18 11.5660359192 -16 59 28.894100856           ~ 3 0
55 2MASS J18181172-1650553 Y*? 18 18 11.722 -16 50 55.40           ~ 3 0
56 SPICY 80142 Y*? 18 18 11.840 -16 46 06.10           ~ 3 0
57 SPICY 80148 Y*? 18 18 11.8867280736 -16 54 25.529070852           ~ 3 0
58 SPICY 80147 Y*? 18 18 11.898 -16 49 32.52           ~ 3 0
59 2MASS J18181218-1657232 Y*O 18 18 12.184 -16 57 23.26           ~ 4 0
60 2MASS J18181234-1649251 Y*? 18 18 12.343 -16 49 25.20           ~ 5 0
61 SPICY 80170 Y*? 18 18 12.562 -16 49 04.56           ~ 2 0
62 SPICY 80173 Y*? 18 18 12.712 -16 49 26.48           ~ 3 0
63 SPICY 80175 Y*? 18 18 12.738 -16 49 02.30           ~ 1 0
64 2MASS J18181279-1648541 Y*? 18 18 12.800 -16 48 54.17           ~ 2 0
65 SPICY 80203 Y*? 18 18 14.565 -16 47 45.67           ~ 2 0
66 2MASS J18181522-1649325 Y*? 18 18 15.220 -16 49 32.58           ~ 3 0
67 SPICY 80255 Y*? 18 18 18.063 -16 46 31.42           ~ 1 0
68 SPICY 80256 Y*? 18 18 18.125 -16 46 48.17           ~ 3 0
69 2MASS J18181905-1658499 Y*? 18 18 19.055 -16 58 49.91           ~ 3 0
70 SPICY 80295 Y*? 18 18 20.497 -16 56 52.65           ~ 4 0
71 SPICY 80316 Y*? 18 18 21.438 -16 58 51.84           ~ 3 0
72 2MASS J18182333-1649085 Y*? 18 18 23.334 -16 49 08.55           ~ 4 0
73 2MASS J18182362-1656233 Y*? 18 18 23.6274132744 -16 56 23.237994768           ~ 3 0
74 2MASS J18182469-1655278 Y*? 18 18 24.69984 -16 55 27.8292           ~ 2 0
75 2MASS J18182511-1649239 Y*? 18 18 25.113 -16 49 23.93           ~ 3 0
76 SPICY 80368 Y*? 18 18 25.491 -16 54 06.99           ~ 4 0
77 2MASS J18182559-1649049 Y*? 18 18 25.5985887888 -16 49 04.979851248           ~ 4 0
78 2MASS J18182594-1650322 Y*? 18 18 25.947 -16 50 32.28           ~ 3 0
79 2MASS J18182632-1653103 Y*? 18 18 26.325 -16 53 10.37           ~ 2 0
80 2MASS J18182635-1645593 Y*? 18 18 26.35272 -16 45 59.3316           ~ 2 0
81 SPICY 80410 Y*? 18 18 28.361 -16 46 24.56           ~ 4 0
82 2MASS J18182838-1653028 Y*? 18 18 28.381 -16 53 02.81           ~ 2 0
83 2MASS J18182860-1656423 Y*? 18 18 28.605 -16 56 42.33           ~ 4 0
84 2MASS J18182863-1655243 Y*? 18 18 28.633 -16 55 24.34           ~ 4 0
85 2MASS J18182896-1642487 Y*? 18 18 28.960 -16 42 48.79           ~ 3 0
86 2MASS J18183047-1650347 Y*? 18 18 30.470 -16 50 34.72           ~ 2 0
87 2MASS J18183148-1652122 Y*? 18 18 31.481 -16 52 12.20           ~ 4 0
88 2MASS J18183164-1638045 Y*? 18 18 31.64856 -16 38 04.5024           ~ 2 0
89 2MASS J18183237-1655260 Y*? 18 18 32.376 -16 55 26.08           ~ 3 0
90 2MASS J18183250-1654054 Y*? 18 18 32.5000840704 -16 54 05.382330912           ~ 3 0
91 SPICY 80492 Y*? 18 18 32.623 -16 49 08.27           ~ 4 0
92 2MASS J18183284-1641491 Y*? 18 18 32.84736 -16 41 49.1316           ~ 2 0
93 2MASS J18183320-1642029 Y*? 18 18 33.206 -16 42 02.91           ~ 4 0
94 MSX6C G014.0242-00.7184 AB? 18 18 34.349 -17 06 08.85           ~ 3 0
95 SPICY 80527 Y*? 18 18 34.865 -16 54 13.53           ~ 3 0
96 2MASS J18183492-1709571 Y*? 18 18 34.921 -17 09 57.19           ~ 3 0
97 2MASS J18183528-1709284 Y*? 18 18 35.28648 -17 09 28.4796           ~ 2 0
98 2MASS J18183631-1653537 Y*? 18 18 36.3170508264 -16 53 53.766666204           ~ 3 0
99 SPICY 80562 Y*? 18 18 36.862 -16 49 37.47           ~ 2 0
100 2MASS J18183707-1648194 Y*? 18 18 37.077 -16 48 19.43           ~ 3 0
101 2MASS J18183732-1649567 Y*O 18 18 37.329 -16 49 56.78           ~ 3 0
102 2MASS J18183767-1648151 Y*? 18 18 37.677 -16 48 15.10           ~ 3 0
103 2MASS J18183798-1650241 Y*? 18 18 37.985 -16 50 24.15           ~ 4 0
104 2MASS J18183862-1653367 Y*? 18 18 38.622 -16 53 36.71           ~ 2 0
105 SPICY 80597 Y*? 18 18 38.631 -16 48 02.65           ~ 1 0
106 2MASS J18183871-1653546 Y*? 18 18 38.718 -16 53 54.62           ~ 2 0
107 2MASS J18183982-1640314 Y*? 18 18 39.82920 -16 40 31.4400           ~ 2 0
108 2MASS J18184009-1647551 Y*? 18 18 40.09320 -16 47 55.1364           ~ 2 0
109 2MASS J18184067-1647276 Y*O 18 18 40.6767841104 -16 47 27.658837536           ~ 3 0
110 2MASS J18184195-1652363 Y*? 18 18 41.95800 -16 52 36.3648           ~ 2 0
111 2MASS J18184224-1653532 Y*? 18 18 42.2496039624 -16 53 53.260202796           ~ 3 0
112 SPICY 80736 Y*? 18 18 44.792 -16 59 29.55           ~ 3 0
113 2MASS J18184530-1632461 Y*? 18 18 45.30072 -16 32 46.1544           ~ 2 0
114 2MASS J18184687-1640244 Y*? 18 18 46.8750571560 -16 40 24.602498364           ~ 4 0
115 2MASS J18184896-1650213 Y*? 18 18 48.965 -16 50 21.32           ~ 3 0
116 2MASS J18185017-1651201 LP? 18 18 50.1703038288 -16 51 20.188751040           ~ 4 0
117 2MASS J18185080-1652160 Y*? 18 18 50.8005988992 -16 52 16.145797116           ~ 3 0
118 2MASS J18185300-1638082 Y*? 18 18 53.0132751216 -16 38 08.233857996           ~ 3 0
119 2MASS J18185353-1641176 Y*? 18 18 53.534 -16 41 17.69           ~ 3 0
120 2MASS J18185369-1635517 Y*? 18 18 53.69976 -16 35 51.7056           ~ 2 0
121 2MASS J18185388-1638069 Y*? 18 18 53.88360 -16 38 06.9216           ~ 2 0
122 2MASS J18185435-1641479 Y*? 18 18 54.354 -16 41 47.91           ~ 4 0
123 2MASS J18185445-1647106 Y*? 18 18 54.4460863536 -16 47 10.682110896           ~ 2 0
124 2MASS J18185455-1646479 AB? 18 18 54.552 -16 46 47.94           ~ 4 0
125 2MASS J18185585-1648216 Y*? 18 18 55.856 -16 48 21.66           ~ 3 0
126 SPICY 80923 Y*? 18 18 56.087 -16 39 39.55           ~ 2 0
127 2MASS J18185650-1646442 Y*? 18 18 56.503 -16 46 44.29           ~ 3 0
128 2MASS J18185703-1638000 Y*? 18 18 57.040 -16 38 00.03           ~ 3 0
129 2MASS J18185721-1638582 Y*? 18 18 57.215 -16 38 58.20           ~ 4 0
130 2MASS J18185738-1637314 Y*? 18 18 57.38880 -16 37 31.4544           ~ 2 0
131 2MASS J18185936-1641019 Y*? 18 18 59.365 -16 41 01.98           ~ 3 0
132 2MASS J18185955-1639274 Y*? 18 18 59.550 -16 39 27.49           ~ 2 0
133 2MASS J18185981-1654111 Y*O 18 18 59.817 -16 54 11.12           ~ 3 0
134 2MASS J18185983-1638046 Y*? 18 18 59.837 -16 38 04.64           ~ 3 0
135 2MASS J18185986-1657330 Y*? 18 18 59.86176 -16 57 33.0660           ~ 2 0
136 2MASS J18185995-1640487 Y*? 18 18 59.959 -16 40 48.70           ~ 3 0
137 NAME M17 SWex MoC 18 19.0 -16 40           ~ 62 0
138 2MASS J18190005-1639252 Y*? 18 19 00.0546234048 -16 39 25.280444016           ~ 4 0
139 2MASS J18190015-1652271 Y*? 18 19 00.15216 -16 52 27.1236           ~ 2 0
140 SPICY 80982 Y*? 18 19 00.676 -16 41 08.66           ~ 4 0
141 2MASS J18190230-1640456 Y*O 18 19 02.3003838024 -16 40 45.656676912           ~ 3 0
142 2MASS J18190240-1654170 Y*? 18 19 02.400 -16 54 17.02           ~ 4 0
143 SPICY 81011 Y*? 18 19 02.683 -16 40 58.27           ~ 1 0
144 SPICY 81013 Y*? 18 19 02.712 -16 41 27.73           ~ 4 0
145 SPICY 81025 Y*? 18 19 03.266 -16 38 57.22           ~ 4 0
146 2MASS J18190370-1641161 Y*? 18 19 03.705 -16 41 16.18           ~ 3 0
147 2MASS J18190596-1638410 Y*? 18 19 05.9568140400 -16 38 40.957975248           ~ 3 0
148 2MASS J18190611-1639086 Y*O 18 19 06.112 -16 39 08.68           ~ 3 0
149 2MASS J18190731-1705119 AB? 18 19 07.311 -17 05 11.95           ~ 3 0
150 2MASS J18190744-1640266 Y*? 18 19 07.449 -16 40 26.64           ~ 3 0
151 SPICY 81093 Y*? 18 19 07.451 -16 44 46.68           ~ 2 0
152 2MASS J18190919-1639556 Y*? 18 19 09.199 -16 39 55.66           ~ 3 0
153 2MASS J18191009-1639080 Y*? 18 19 10.098 -16 39 08.03           ~ 4 0
154 2MASS J18191068-1650229 Y*? 18 19 10.685 -16 50 22.98           ~ 4 0
155 2MASS J18191086-1637394 Y*? 18 19 10.86600 -16 37 39.4824           ~ 2 0
156 2MASS J18191151-1647599 Y*? 18 19 11.517 -16 47 59.99           ~ 3 0
157 SPICY 81186 Y*? 18 19 12.968 -16 40 29.96           ~ 3 0
158 2MASS J18191310-1648365 Y*? 18 19 13.10112 -16 48 36.5184           ~ 2 0
159 SPICY 81204 Y*? 18 19 13.855 -16 49 11.23           ~ 1 0
160 2MASS J18191488-1635564 Y*? 18 19 14.88288 -16 35 56.4360           ~ 2 0
161 2MASS J18191495-1649508 Y*? 18 19 14.959 -16 49 50.82           ~ 4 0
162 2MASS J18191511-1635598 Y*? 18 19 15.11760 -16 35 59.8092           ~ 2 0
163 SPICY 81242 Y*? 18 19 15.772 -16 50 18.02           ~ 3 0
164 SPICY 81251 Y*? 18 19 16.404 -16 43 57.04           ~ 1 0
165 2MASS J18191645-1645571 Y*? 18 19 16.45056 -16 45 57.1968           ~ 2 0
166 2MASS J18191658-1644394 Y*? 18 19 16.580 -16 44 39.49           ~ 3 0
167 2MASS J18191741-1636150 Y*? 18 19 17.41584 -16 36 15.0732           ~ 2 0
168 2MASS J18191821-1643561 Y*? 18 19 18.216 -16 43 56.14           ~ 2 0
169 2MASS J18192037-1648370 Y*? 18 19 20.37336 -16 48 37.0404           ~ 2 0
170 2MASS J18192076-1644020 Y*? 18 19 20.76888 -16 44 02.0004           ~ 2 0
171 2MASS J18192228-1643099 Y*O 18 19 22.288 -16 43 09.94           ~ 3 0
172 2MASS J18192237-1643217 Y*? 18 19 22.373 -16 43 21.73           ~ 3 0
173 2MASS J18192601-1700449 Y*? 18 19 26.016 -17 00 44.91           ~ 3 0
174 2MASS J18192745-1647044 Y*? 18 19 27.45312 -16 47 04.4052           ~ 2 0
175 SPICY 81412 Y*? 18 19 29.450 -16 43 56.75           ~ 3 0
176 2MASS J18192963-1643594 Y*? 18 19 29.632 -16 43 59.42           ~ 3 0
177 UGPS J181932.72-164510.2 G? 18 19 32.727 -16 45 10.22           ~ 1 0
178 2MASS J18193277-1645345 Y*? 18 19 32.7666195144 -16 45 34.614732060           ~ 4 0
179 SPICY 81451 Y*? 18 19 32.817 -16 45 11.97           ~ 4 0
180 TYC 6265-2404-1 * 18 19 33.0392373600 -16 45 10.822322088   12.03 11.68 12.07   ~ 1 0
181 2MASS J18193564-1645445 Y*? 18 19 35.642 -16 45 44.56           ~ 3 0
182 2MASS J18193731-1648148 Y*? 18 19 37.31928 -16 48 14.8896           ~ 2 0
183 SPICY 81516 Y*O 18 19 39.0773594496 -16 43 02.634172176           ~ 5 0
184 2MASS J18193958-1642453 Y*? 18 19 39.586 -16 42 45.31           ~ 3 0
185 2MASS J18194071-1641227 Y*? 18 19 40.71024 -16 41 22.7112           ~ 2 0
186 2MASS J18194156-1645013 Y*? 18 19 41.562 -16 45 01.30           ~ 3 0
187 SPICY 81539 Y*? 18 19 41.711 -16 44 50.13           ~ 3 0
188 2MASS J18194202-1641417 Y*? 18 19 42.030 -16 41 41.79           ~ 4 0
189 2MASS J18194800-1644152 AB? 18 19 48.0076820952 -16 44 15.191222388           ~ 4 0
190 NGC 6618 OpC 18 20 47 -16 10.3           ~ 1700 0
191 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 1195 1
192 V* V371 Ser Or* 18 29 51.21240 +01 16 39.4860           ~ 132 1
193 DR 21 SFR 20 39 01.6 +42 19 38           O4.5 1121 0
194 NAME Gould Belt PoG ~ ~           ~ 956 1

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