2020ApJ...905...78Y

Query : 2020ApJ...905...78Y

2020ApJ...905...78Y - Astrophys. J., 905, 78-78 (2020/December-2)

An X-ray view of two infrared dark clouds G034.43+00.24 and G035.39-00.33.

YU H., WANG J. and TAN J.C.

Abstract (from CDS):

We present a high spatial resolution Chandra X-ray study of two infrared dark clouds (IRDCs), G034.43+00.24 and G035.39-00.33, which are expected to be in the early phases of star cluster formation. We detect 112 and 209 valid X-ray point sources toward G034.43+00.24 and G035.39-00.33, respectively. We cross-match the X-ray point sources with the Two Micron All Sky Survey (2MASS), Galactic Legacy Infrared Midplane Survey Extraordinaire (GLIMPSE), and Wide-field Infrared Survey Explorer (WISE) catalogs and find 53% and 59% of the X-ray sources in G034.43+00.24 and in G035.39-00.33 have corresponding infrared counterparts, respectively. These sources are probable members of young massive clusters in formation, and using stellar isochrones we estimate that a population of 1-2 Myr old, intermediate- to high-mass young stellar objects (YSOs) exist in both IRDCs. Two and 10 Class II counterparts to X-ray sources were identified in G034.43+00.24 and in G035.39-00.33, respectively, which are located in or near dark filaments. The X-ray luminosity function (XLF) of G035.39-00.33 implies that the total mass consists of up to ∼1700M☉ of stars, using the XLF of the well-studied Orion Nebula Cluster as a calibrator. This corresponds to a star formation efficiency of at most 5%, indicating the system is still very much gas dominated and in an early stage of the star formation process. The population of G034.43+00.24 is less well determined due to the lower sensitivity of its observations.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Star formation - Infrared dark clouds - X-ray stars

VizieR on-line data: <Available at CDS (J/ApJ/905/78): table1.dat table2.dat table3.dat table5.dat table6.dat table7.dat table8.dat>

Simbad objects: 331

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Number of rows : 331
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 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2514 0
2 M 42 HII 05 35 16.8 -05 23 15           ~ 4411 0
3 NGC 2244 OpC 06 32 06.9 +04 54 19           ~ 673 1
4 NGC 6357 OpC 17 24 44 -34 12.2           ~ 303 0
5 NAME M17 SWex MoC 18 19.0 -16 40           ~ 62 0
6 NAME Dragon Nebula DNe 18 42 50.6 -04 03 30           ~ 177 0
7 2MASS J18524608+0125196 Y*O 18 52 46.08912 +01 25 19.6356           ~ 1 0
8 2MASS J18524832+0127427 Y*O 18 52 48.32568 +01 27 42.7068           ~ 1 0
9 CXOU J185249.9+012445 Y*O 18 52 49.995 +01 24 45.66           ~ 1 0
10 2MASS J18525009+0128138 Y*O 18 52 50.09784 +01 28 13.8720           ~ 1 0
11 CXOU J185251.5+012112 Y*O 18 52 51.548 +01 21 12.19           ~ 1 0
12 CXOU J185256.8+012430 Y*O 18 52 56.836 +01 24 30.30           ~ 1 0
13 CXOU J185258.2+012411 Y*O 18 52 58.228 +01 24 11.55           ~ 1 0
14 2MASS J18525982+0122074 Y*O 18 52 59.82600 +01 22 07.4172           ~ 1 0
15 2MASS J18530052+0121448 Y*O 18 53 00.52776 +01 21 44.8992           ~ 1 0
16 CXOU J185301.0+012844 Y*O 18 53 01.088 +01 28 45.26           ~ 1 0
17 CXOU J185302.4+013153 Y*O 18 53 02.439 +01 31 53.08           ~ 1 0
18 CXOU J185302.8+011750 Y*O 18 53 02.849 +01 17 50.26           ~ 1 0
19 CXOU J185302.9+012137 Y*O 18 53 02.900 +01 21 37.97           ~ 1 0
20 CXOU J185303.6+011857 Y*O 18 53 03.699 +01 18 57.60           ~ 1 0
21 CXOU J185304.8+012621 Y*O 18 53 04.900 +01 26 21.76           ~ 1 0
22 2MASS J18530492+0130168 Y*O 18 53 04.92408 +01 30 16.8372           ~ 1 0
23 CXOU J185306.8+012015 Y*O 18 53 06.811 +01 20 15.26           ~ 1 0
24 CXOU J185308.2+012934 Y*O 18 53 08.240 +01 29 34.05           ~ 1 0
25 CXOU J185308.4+012451 Y*O 18 53 08.437 +01 24 51.02           ~ 1 0
26 2MASS J18530867+0131175 Y*O 18 53 08.67960 +01 31 17.5728           ~ 1 0
27 2MASS J18530888+0122454 Y*O 18 53 08.88288 +01 22 45.4548           ~ 1 0
28 CXOU J185308.8+012423 Y*O 18 53 08.899 +01 24 23.93           ~ 1 0
29 ZTF J185309.38+011855.4 BY* 18 53 09.38112 +01 18 55.6056           ~ 3 0
30 2MASS J18530947+0121432 Y*O 18 53 09.47544 +01 21 43.2072           ~ 1 0
31 CXOU J185310.8+012403 Y*O 18 53 10.869 +01 24 03.27           ~ 1 0
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33 2MASS J18531215+0128458 Y*O 18 53 12.15576 +01 28 45.8292           ~ 1 0
34 2MASS J18531283+0124162 Y*O 18 53 12.83064 +01 24 16.2576           ~ 1 0
35 CXOU J185313.0+012954 Y*O 18 53 13.008 +01 29 54.68           ~ 2 0
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41 CXOU J185314.9+012825 Y*O 18 53 14.956 +01 28 25.51           ~ 1 0
42 CXOU J185315.3+012706 Y*O 18 53 15.353 +01 27 06.84           ~ 1 0
43 CXOU J185315.7+012138 Y*O 18 53 15.710 +01 21 38.37           ~ 1 0
44 2MASS J18531576+0119233 Y*O 18 53 15.76104 +01 19 23.3400           ~ 2 0
45 CXOU J185316.2+011603 Y*O 18 53 16.223 +01 16 03.30           ~ 1 0
46 CXOU J185316.3+011647 Y*O 18 53 16.355 +01 16 47.01           ~ 1 0
47 CXOU J185316.4+013014 Y*O 18 53 16.414 +01 30 14.15           ~ 1 0
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49 CXOU J185316.8+013112 Y*O 18 53 16.868 +01 31 12.45           ~ 1 0
50 2MASS J18531691+0134190 Y*O 18 53 16.91736 +01 34 19.0416           ~ 1 0
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53 2MASS J18531778+0123493 Y*O 18 53 17.78280 +01 23 49.3620           ~ 5 0
54 CXOU J185317.8+012041 Y*O 18 53 17.813 +01 20 41.14           ~ 1 0
55 CXOU J185317.8+012335 Y*O 18 53 17.856 +01 23 35.39           ~ 1 0
56 TYC 449-305-1 Y*O 18 53 18.0778410744 +01 26 57.300800244   13.00 12.36 12.27   ~ 1 0
57 CXOU J185318.1+012514 Y*O 18 53 18.125 +01 25 14.11           ~ 1 0
58 CXOU J185318.1+011450 Y*O 18 53 18.164 +01 14 50.27           ~ 1 0
59 CXOU J185318.3+012201 Y*O 18 53 18.340 +01 22 01.45           ~ 1 0
60 CXOU J185318.4+012453 Y*O 18 53 18.355 +01 24 54.53           ~ 6 0
61 CXOU J185318.5+012738 Y*O 18 53 18.599 +01 27 38.87           ~ 2 0
62 CXOU J185318.6+012446 Y*O 18 53 18.655 +01 24 46.82           ~ 1 0
63 CXOU J185318.6+012449 Y*O 18 53 18.684 +01 24 49.04           ~ 1 0
64 2MASS J18531879+0124194 Y*O 18 53 18.79776 +01 24 19.4904           ~ 3 0
65 MSXDC G034.43+00.24 MoC 18 53 18.9 +01 26 39           ~ 122 0
66 2MASS J18531905+0128214 Y*O 18 53 19.05 +01 28 21.4           ~ 2 0
67 CXOU J185319.0+012724 Y*O 18 53 19.050 +01 27 24.34           ~ 1 0
68 CXOU J185319.0+013500 Y*O 18 53 19.094 +01 35 00.16           ~ 1 0
69 CXOU J185319.4+011932 Y*O 18 53 19.409 +01 19 32.83           ~ 1 0
70 CXOU J185319.5+012413 Y*O 18 53 19.578 +01 24 13.69           ~ 1 0
71 CXOU J185320.1+012211 Y*O 18 53 20.134 +01 22 11.79           ~ 1 0
72 CXOU J185320.3+012555 Y*O 18 53 20.310 +01 25 55.58           ~ 1 0
73 2MASS J18532058+0114298 Y*O 18 53 20.58240 +01 14 29.8140           ~ 1 0
74 CXOU J185321.0+011954 Y*O 18 53 21.057 +01 19 54.37           ~ 1 0
75 2MASS J18532123+0118254 Y*O 18 53 21.23208 +01 18 25.4124           ~ 1 0
76 2MASS J18532159+0126336 Y*O 18 53 21.59640 +01 26 33.6192           ~ 1 0
77 CXOU J185321.6+012414 Y*O 18 53 21.606 +01 24 14.53           ~ 1 0
78 2MASS J18532163+0121567 Y*O 18 53 21.63648 +01 21 56.7828           ~ 1 0
79 CXOU J185321.8+012527 Y*O 18 53 21.804 +01 25 27.40           ~ 1 0
80 CXOU J185322.0+012727 Y*O 18 53 22.024 +01 27 27.29           ~ 1 0
81 2MASS J18532246+0129133 Y*O 18 53 22.4565357869 +01 29 13.242908518           ~ 2 0
82 CXOU J185322.9+012651 Y*O 18 53 22.910 +01 26 51.68           ~ 1 0
83 CXOU J185323.3+012602 Y*O 18 53 23.379 +01 26 02.38           ~ 1 0
84 2MASS J18532382+0124137 Y*O 18 53 23.82960 +01 24 13.7268           ~ 1 0
85 CXOU J185323.8+011702 Y*O 18 53 23.884 +01 17 02.99           ~ 1 0
86 CXOU J185323.8+012153 Y*O 18 53 23.884 +01 21 53.07           ~ 1 0
87 2MASS J18532599+0125532 Y*O 18 53 25.99152 +01 25 53.2668           ~ 1 0
88 CXOU J185326.1+012656 Y*O 18 53 26.133 +01 26 56.86           ~ 1 0
89 2MASS J18532638+0125044 Y*O 18 53 26.38656 +01 25 04.4472           ~ 1 0
90 CXOU J185326.7+012221 Y*O 18 53 26.785 +01 22 21.14           ~ 1 0
91 ZTF J185327.94+011736.6 BY* 18 53 27.95448 +01 17 36.5820           ~ 3 0
92 2MASS J18532800+0119384 Y*O 18 53 28.00080 +01 19 38.4204           ~ 1 0
93 CXOU J185328.0+012324 Y*O 18 53 28.022 +01 23 24.03           ~ 1 0
94 2MASS J18532834+0116552 Y*O 18 53 28.3375649424 +01 16 55.248148596           ~ 2 0
95 CXOU J185328.4+013237 Y*O 18 53 28.403 +01 32 37.14           ~ 1 0
96 CXOU J185328.4+012853 Y*O 18 53 28.462 +01 28 53.84           ~ 1 0
97 2MASS J18532956+0124194 Y*O 18 53 29.56920 +01 24 19.4328           ~ 1 0
98 CXOU J185329.5+012722 Y*O 18 53 29.597 +01 27 22.82           ~ 1 0
99 CXOU J185329.7+012534 Y*O 18 53 29.741 +01 25 35.55           ~ 1 0
100 CXOU J185329.7+012331 Y*O 18 53 29.758 +01 23 31.20           ~ 1 0
101 CXOU J185331.3+012625 Y*O 18 53 31.311 +01 26 25.05           ~ 1 0
102 CXOU J185331.3+012028 Y*O 18 53 31.384 +01 20 28.38           ~ 1 0
103 CXOU J185331.7+012516 Y*O 18 53 31.751 +01 25 16.36           ~ 1 0
104 CXOU J185331.9+012545 Y*O 18 53 31.904 +01 25 45.03           ~ 1 0
105 2MASS J18533235+0128453 Y*O 18 53 32.35464 +01 28 45.3360           ~ 1 0
106 CXOU J185333.1+012437 Y*O 18 53 33.142 +01 24 37.85           ~ 1 0
107 CXOU J185333.6+012646 Y*O 18 53 33.610 +01 26 45.56           ~ 1 0
108 CXOU J185334.9+012907 Y*O 18 53 34.973 +01 29 07.09           ~ 1 0
109 CXOU J185335.0+012422 Y*O 18 53 35.050 +01 24 22.14           ~ 1 0
110 CXOU J185335.1+011816 Y*O 18 53 35.267 +01 18 16.89           ~ 1 0
111 CXOU J185335.6+011708 Y*O 18 53 35.559 +01 17 07.43           ~ 1 0
112 CXOU J185335.8+012617 Y*O 18 53 35.808 +01 26 17.91           ~ 1 0
113 2MASS J18533669+0123303 Y*O 18 53 36.6902198907 +01 23 30.323423720           ~ 2 0
114 2MASS J18533941+0122277 Y*O 18 53 39.41256 +01 22 27.7284           ~ 1 0
115 CXOU J185340.6+012603 Y*O 18 53 40.650 +01 26 03.86           ~ 1 0
116 CXOU J185345.9+012701 Y*O 18 53 45.937 +01 27 01.45           ~ 1 0
117 2MASS J18534771+0127184 Y*O 18 53 47.71464 +01 27 18.4212           ~ 1 0
118 2MASS J18534779+0128072 Y*O 18 53 47.79840 +01 28 07.2804           ~ 1 0
119 CXOU J185359.0+012837 Y*O 18 53 59.040 +01 28 37.87           ~ 1 0
120 2MASS J18562963+0204392 Y*O 18 56 29.63184 +02 04 39.2844           ~ 1 0
121 CXOU J185634.6+020942 Y*O 18 56 34.745 +02 09 41.62           ~ 1 0
122 CXOU J185635.1+020729 Y*O 18 56 35.127 +02 07 29.68           ~ 1 0
123 CXOU J185635.1+021528 Y*O 18 56 35.127 +02 15 28.35           ~ 1 0
124 CXOU J185638.1+020931 Y*O 18 56 38.076 +02 09 33.11           ~ 1 0
125 2MASS J18563939+0208365 Y*O 18 56 39.39816 +02 08 36.5388           ~ 1 0
126 2MASS J18564389+0202453 Y*O 18 56 43.89504 +02 02 45.3912           ~ 1 0
127 CXOU J185643.9+021331 Y*O 18 56 43.960 +02 13 31.62           ~ 1 0
128 CXOU J185643.9+020655 Y*O 18 56 43.982 +02 06 55.34           ~ 1 0
129 2MASS J18564573+0211058 Y*O 18 56 45.73176 +02 11 05.8092           ~ 1 0
130 HD 175746 Y*O 18 56 45.8175612240 +02 06 38.469876408   10.20 9.66     F3/5V 5 0
131 CXOU J185646.3+020851 Y*O 18 56 46.318 +02 08 51.20           ~ 1 0
132 2MASS J18564640+0209490 Y*O 18 56 46.40088 +02 09 49.0608           ~ 1 0
133 2MASS J18564682+0212130 Y*O 18 56 46.82400 +02 12 13.0212           ~ 1 0
134 CXOU J185648.0+020758 Y*O 18 56 48.040 +02 07 58.57           ~ 1 0
135 CXOU J185648.4+021051 Y*O 18 56 48.420 +02 10 51.30           ~ 1 0
136 2MASS J18564855+0206464 Y*O 18 56 48.55848 +02 06 46.4544           ~ 1 0
137 2MASS J18564873+0209459 Y*O 18 56 48.73128 +02 09 45.9648           ~ 1 0
138 CXOU J185649.0+021301 Y*O 18 56 48.981 +02 13 01.99           ~ 1 0
139 2MASS J18564908+0207117 Y*O 18 56 49.08408 +02 07 11.7660           ~ 1 0
140 CXOU J185649.7+021022 Y*O 18 56 49.753 +02 10 22.09           ~ 1 0
141 2MASS J18565037+0204315 Y*O 18 56 50.37816 +02 04 31.5984           ~ 1 0
142 2MASS J18565073+0206342 Y*O 18 56 50.73144 +02 06 34.2324           ~ 1 0
143 CXOU J185651.1+021024 Y*O 18 56 51.167 +02 10 24.50           ~ 1 0
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145 CXOU J185652.1+020529 Y*O 18 56 52.148 +02 05 29.70           ~ 1 0
146 2MASS J18565222+0207559 Y*O 18 56 52.22256 +02 07 55.9452           ~ 1 0
147 CXOU J185652.3+020737 Y*O 18 56 52.398 +02 07 37.08           ~ 1 0
148 ZTF J185652.60+020423.1 Y*O 18 56 52.60488 +02 04 23.3652           ~ 3 0
149 CXOU J185653.6+021332 Y*O 18 56 53.613 +02 13 32.57           ~ 1 0
150 2MASS J18565373+0208185 Y*O 18 56 53.73336 +02 08 18.5856           ~ 1 0
151 CXOU J185653.7+020424 Y*O 18 56 53.796 +02 04 24.23           ~ 1 0
152 CXOU J185653.9+020811 Y*O 18 56 53.958 +02 08 11.23           ~ 1 0
153 CXOU J185653.9+020958 Y*O 18 56 53.958 +02 09 58.54           ~ 1 0
154 2MASS J18565399+0208498 Y*O 18 56 53.99136 +02 08 49.8768           ~ 1 0
155 CXOU J185654.0+021101 Y*O 18 56 54.075 +02 11 01.02           ~ 1 0
156 CXOU J185654.5+020918 Y*O 18 56 54.536 +02 09 18.01           ~ 1 0
157 2MASS J18565455+0212400 Y*O 18 56 54.55800 +02 12 40.0068           ~ 1 0
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162 2MASS J18565581+0208485 Y*O 18 56 55.81320 +02 08 48.5196           ~ 1 0
163 2MASS J18565588+0213442 Y*O 18 56 55.88472 +02 13 44.2812           ~ 1 0
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170 CXOU J185657.8+021152 Y*O 18 56 57.889 +02 11 51.93           ~ 1 0
171 CXOU J185658.0+020552 Y*O 18 56 58.037 +02 05 52.54           ~ 1 0
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173 2MASS J18565835+0208480 Y*O 18 56 58.35576 +02 08 48.0228           ~ 1 0
174 CXOU J185658.3+020839 Y*O 18 56 58.396 +02 08 39.28           ~ 1 0
175 CXOU J185658.7+020858 Y*O 18 56 58.770 +02 08 58.53           ~ 1 0
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177 CXOU J185659.9+020829 Y*O 18 56 59.905 +02 08 29.77           ~ 1 0
178 2MASS J18570002+0206080 Y*O 18 57 00.02184 +02 06 08.0568           ~ 1 0
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184 CXOU J185700.7+021140 Y*O 18 57 00.680 +02 11 41.01           ~ 1 0
185 CXOU J185701.6+020848 Y*O 18 57 01.641 +02 08 48.82           ~ 1 0
186 CXOU J185701.8+020922 Y*O 18 57 01.882 +02 09 22.60           ~ 1 0
187 CXOU J185701.9+020657 Y*O 18 57 01.992 +02 06 57.61           ~ 1 0
188 CXOU J185702.1+020423 Y*O 18 57 02.161 +02 04 23.02           ~ 1 0
189 CXOU J185702.5+020415 Y*O 18 57 02.556 +02 04 15.86           ~ 1 0
190 CXOU J185703.1+020927 Y*O 18 57 03.179 +02 09 27.50           ~ 1 0
191 2MASS J18570336+0205362 Y*O 18 57 03.36336 +02 05 36.2400           ~ 1 0
192 TYC 453-321-1 Y*O 18 57 03.6027427872 +02 04 40.336118184   12.53 11.74     ~ 1 0
193 CXOU J185703.6+021828 Y*O 18 57 03.618 +02 18 28.05           ~ 1 0
194 2MASS J18570387+0203432 Y*O 18 57 03.87312 +02 03 43.2288           ~ 1 0
195 CXOU J185703.8+021505 Y*O 18 57 03.909 +02 15 06.48           ~ 1 0
196 CXOU J185704.1+020601 Y*O 18 57 04.182 +02 06 01.23           ~ 1 0
197 ZTF J185704.30+021143.4 Y*O 18 57 04.3036556931 +02 11 43.475336248           ~ 4 0
198 2MASS J18570441+0200149 Y*O 18 57 04.41528 +02 00 14.9796           ~ 1 0
199 2MASS J18570470+0210489 Y*O 18 57 04.70064 +02 10 48.9108           ~ 1 0
200 CXOU J185704.7+020330 Y*O 18 57 04.775 +02 03 30.43           ~ 1 0
201 2MASS J18570498+0212371 Y*O 18 57 04.98168 +02 12 37.1124           ~ 1 0
202 AGAL G035.452-00.296 Y*O 18 57 05.178 +02 06 30.26           ~ 26 0
203 CXOU J185705.4+020453 Y*O 18 57 05.328 +02 04 52.09           ~ 1 0
204 CXOU J185705.4+020544 Y*O 18 57 05.464 +02 05 44.82           ~ 1 0
205 CXOU J185706.0+020641 Y*O 18 57 06.086 +02 06 41.73           ~ 1 0
206 2MASS J18570632+0206543 Y*O 18 57 06.32496 +02 06 54.3204           ~ 1 0
207 2MASS J18570634+0208255 Y*O 18 57 06.34464 +02 08 25.5732           ~ 1 0
208 CXOU J185706.3+020835 Y*O 18 57 06.387 +02 08 35.33           ~ 1 0
209 2MASS J18570648+0207156 Y*O 18 57 06.48312 +02 07 15.6216           ~ 1 0
210 2MASS J18570657+0209557 Y*O 18 57 06.57240 +02 09 55.7136           ~ 1 0
211 CXOU J185706.5+020557 Y*O 18 57 06.584 +02 05 57.58           ~ 1 0
212 CXOU J185706.6+020830 Y*O 18 57 06.608 +02 08 30.38           ~ 2 0
213 CXOU J185706.6+021207 Y*O 18 57 06.661 +02 12 06.40           ~ 1 0
214 CXOU J185706.6+021205 Y*O 18 57 06.661 +02 12 06.40           ~ 1 0
215 ATO J284.2782+02.0566 Y*O 18 57 06.7798177534 +02 03 24.012563632           ~ 5 0
216 2MASS J18570689+0201540 Y*O 18 57 06.89016 +02 01 54.0732           ~ 1 0
217 CXOU J185706.9+020913 Y*O 18 57 06.943 +02 09 13.31           ~ 1 0
218 CXOU J185707.0+021009 Y*O 18 57 06.994 +02 10 09.56           ~ 1 0
219 CXOU J185707.0+020556 Y*O 18 57 07.006 +02 05 56.45           ~ 1 0
220 CXOU J185707.0+020726 Y*O 18 57 07.009 +02 07 26.09           ~ 1 0
221 2MASS J18570701+0209397 Y*O 18 57 07.01880 +02 09 39.7332           ~ 1 0
222 2MASS J18570768+0209028 Y*O 18 57 07.68528 +02 09 02.8944           ~ 3 0
223 CXOU J185707.7+021001 Y*O 18 57 07.737 +02 10 01.82           ~ 1 0
224 CXOU J185707.8+020642 Y*O 18 57 07.800 +02 06 42.94           ~ 1 0
225 CXOU J185707.8+020751 Y*O 18 57 07.851 +02 07 51.61           ~ 2 0
226 CXOU J185707.9+021037 Y*O 18 57 07.93824 +02 10 38.6184           ~ 6 0
227 CXOU J185708.2+021325 Y*O 18 57 08.269 +02 13 25.44           ~ 1 0
228 2MASS J18570838+0205415 Y*O 18 57 08.38272 +02 05 41.5536           ~ 1 0
229 CXOU J185708.7+020424 Y*O 18 57 08.774 +02 04 24.45           ~ 1 0
230 CXOU J185708.7+020915 Y*O 18 57 08.796 +02 09 15.67           ~ 1 0
231 CXOU J185708.8+020901 Y*O 18 57 08.817 +02 09 01.00           ~ 1 0
232 2MASS J18570889+0209036 Y*O 18 57 08.89680 +02 09 03.6144           ~ 2 0
233 CXOU J185708.9+020543 Y*O 18 57 08.919 +02 05 43.91           ~ 1 0
234 CXOU J185708.9+020831 Y*O 18 57 08.934 +02 08 32.27           ~ 1 0
235 MSXDC G035.39-00.33 MoC 18 57 09.0 +02 07 46           ~ 132 0
236 CXOU J185709.1+020826 Y*O 18 57 09.155 +02 08 26.69           ~ 1 0
237 2MASS J18570917+0206574 Y*O 18 57 09.17832 +02 06 57.4632           ~ 1 0
238 CXOU J185709.3+021039 Y*O 18 57 09.50808 +02 10 41.0448           ~ 2 0
239 2MASS J18570980+0213556 Y*O 18 57 09.80832 +02 13 55.6644           ~ 1 0
240 CXOU J185710.1+020917 Y*O 18 57 10.116 +02 09 18.06           ~ 1 0
241 CXOU J185710.8+021115 Y*O 18 57 10.891 +02 11 15.03           ~ 1 0
242 CXOU J185711.1+020957 Y*O 18 57 11.148 +02 09 57.94           ~ 1 0
243 CXOU J185711.2+020429 Y*O 18 57 11.271 +02 04 29.94           ~ 1 0
244 2MASS J18571143+0207435 Y*O 18 57 11.43144 +02 07 43.5540           ~ 2 0
245 CXOU J185711.4+021047 Y*O 18 57 11.484 +02 10 47.09           ~ 1 0
246 2MASS J18571160+0207209 Y*O 18 57 11.60640 +02 07 20.9424           ~ 1 0
247 2MASS J18571207+0207568 Y*O 18 57 12.07656 +02 07 56.8632           ~ 2 0
248 CXOU J185712.0+021730 Y*O 18 57 12.085 +02 17 30.30           ~ 1 0
249 2MASS J18571213+0216361 Y*O 18 57 12.1355531568 +02 16 36.364232532           ~ 3 0
250 CXOU J185712.1+021106 Y*O 18 57 12.173 +02 11 06.28           ~ 1 0
251 2MASS J18571280+0207086 Y*O 18 57 12.80592 +02 07 08.6736           ~ 1 0
252 CXOU J185712.9+021232 Y*O 18 57 12.993 +02 12 32.49           ~ 1 0
253 2MASS J18571301+0209128 Y*O 18 57 13.0287453552 +02 09 12.809931984           ~ 3 0
254 CXOU J185713.2+020714 Y*O 18 57 13.286 +02 07 14.90           ~ 1 0
255 CXOU J185713.6+020954 Y*O 18 57 13.652 +02 09 54.16           ~ 1 0
256 CXOU J185714.4+020147 Y*O 18 57 14.487 +02 01 47.34           ~ 1 0
257 2MASS J18571449+0211136 Y*O 18 57 14.49168 +02 11 13.6968           ~ 1 0
258 2MASS J18571458+0210341 Y*O 18 57 14.58480 +02 10 34.1652           ~ 1 0
259 CXOU J185714.6+020856 Y*O 18 57 14.604 +02 08 56.43           ~ 1 0
260 2MASS J18571494+0210069 Y*O 18 57 14.94144 +02 10 06.9564           ~ 2 0
261 CXOU J185715.2+021020 Y*O 18 57 15.214 +02 10 20.13           ~ 1 0
262 CXOU J185715.6+020930 Y*O 18 57 15.592 +02 09 30.79           ~ 1 0
263 CXOU J185716.2+021144 Y*O 18 57 16.274 +02 11 44.83           ~ 1 0
264 CXOU J185716.4+020706 Y*O 18 57 16.426 +02 07 05.00           ~ 1 0
265 CXOU J185716.5+020907 Y*O 18 57 16.503 +02 09 08.57           ~ 1 0
266 2MASS J18571686+0201468 Y*O 18 57 16.86408 +02 01 46.8516           ~ 1 0
267 CXOU J185717.1+020831 Y*O 18 57 16.94832 +02 08 28.2228           ~ 3 0
268 2MASS J18571745+0209016 Y*O 18 57 17.45664 +02 09 01.6236           ~ 2 0
269 CXOU J185717.5+020744 Y*O 18 57 17.593 +02 07 44.86           ~ 1 0
270 2MASS J18571810+0210276 Y*O 18 57 18.10008 +02 10 27.6636           ~ 1 0
271 2MASS J18571813+0209101 Y*O 18 57 18.13776 +02 09 10.1052           ~ 2 0
272 2MASS J18571822+0203235 Y*O 18 57 18.22320 +02 03 23.5548           ~ 1 0
273 CXOU J185718.8+020711 Y*O 18 57 18.801 +02 07 11.01           ~ 1 0
274 2MASS J18571882+0203535 Y*O 18 57 18.82080 +02 03 53.5860           ~ 1 0
275 2MASS J18571919+0206312 Y*O 18 57 19.19856 +02 06 31.2048           ~ 1 0
276 2MASS J18571961+0213221 Y*O 18 57 19.61400 +02 13 22.1772           ~ 1 0
277 CXOU J185720.0+020512 Y*O 18 57 20.087 +02 05 13.07           ~ 1 0
278 CXOU J185720.2+020448 Y*O 18 57 20.237 +02 04 48.65           ~ 1 0
279 CXOU J185720.2+020347 Y*O 18 57 20.251 +02 03 47.77           ~ 1 0
280 CXOU J185720.4+020050 Y*O 18 57 20.442 +02 00 50.14           ~ 1 0
281 CXOU J185720.5+020345 Y*O 18 57 20.552 +02 03 45.22           ~ 1 0
282 CXOU J185721.1+020807 Y*O 18 57 21.189 +02 08 07.68           ~ 1 0
283 CXOU J185721.4+020845 Y*O 18 57 21.416 +02 08 45.39           ~ 1 0
284 CXOU J185721.8+020508 Y*O 18 57 21.819 +02 05 08.37           ~ 1 0
285 2MASS J18572212+0208113 Y*O 18 57 22.12896 +02 08 11.3424           ~ 1 0
286 CXOU J185722.3+020347 Y*O 18 57 22.361 +02 03 47.88           ~ 1 0
287 2MASS J18572237+0204292 Y*O 18 57 22.37400 +02 04 29.2440           ~ 1 0
288 2MASS J18572300+0206415 Y*O 18 57 23.010 +02 06 41.52           ~ 4 0
289 CXOU J185723.0+020746 Y*O 18 57 23.027 +02 07 46.74           ~ 1 0
290 CXOU J185723.2+021043 Y*O 18 57 23.240 +02 10 43.01           ~ 1 0
291 CXOU J185723.3+020222 Y*O 18 57 23.364 +02 02 22.75           ~ 1 0
292 2MASS J18572407+0209461 Y*O 18 57 24.07488 +02 09 46.1448           ~ 1 0
293 ZTF J185724.84+021211.5 RS* 18 57 24.82800 +02 12 11.5956           ~ 3 0
294 CXOU J185725.0+015830 Y*O 18 57 25.078 +01 58 30.75           ~ 1 0
295 2MASS J18572522+0209275 Y*O 18 57 25.22568 +02 09 27.5796           ~ 1 0
296 CXOU J185725.8+020438 Y*O 18 57 25.877 +02 04 38.33           ~ 1 0
297 CXOU J185726.0+020136 Y*O 18 57 26.023 +02 01 36.87           ~ 1 0
298 2MASS J18572659+0212576 Y*O 18 57 26.59416 +02 12 57.6108           ~ 1 0
299 CXOU J185727.3+021537 Y*O 18 57 27.319 +02 15 37.56           ~ 1 0
300 2MASS J18572789+0209139 Y*O 18 57 27.89976 +02 09 13.9644           ~ 1 0
301 2MASS J18572798+0211331 Y*O 18 57 27.98664 +02 11 33.1152           ~ 1 0
302 CXOU J185728.8+020930 Y*O 18 57 28.821 +02 09 30.09           ~ 1 0
303 CXOU J185729.4+021048 Y*O 18 57 29.443 +02 10 48.66           ~ 1 0
304 2MASS J18572978+0204133 Y*O 18 57 29.78880 +02 04 13.3752           ~ 1 0
305 CXOU J185729.8+020308 Y*O 18 57 29.898 +02 03 08.70           ~ 1 0
306 CXOU J185730.2+021015 Y*O 18 57 30.286 +02 10 15.21           ~ 1 0
307 CXOU J185730.5+020647 Y*O 18 57 30.549 +02 06 47.65           ~ 1 0
308 CXOU J185730.7+021154 Y*O 18 57 30.747 +02 11 54.45           ~ 1 0
309 CXOU J185731.3+021059 Y*O 18 57 31.311 +02 10 59.74           ~ 1 0
310 2MASS J18573196+0204524 Y*O 18 57 31.96992 +02 04 52.4712           ~ 1 0
311 2MASS J18573232+0206562 Y*O 18 57 32.32920 +02 06 56.2536           ~ 1 0
312 CXOU J185732.9+020921 Y*O 18 57 32.981 +02 09 21.62           ~ 1 0
313 2MASS J18573375+0210031 Y*O 18 57 33.75936 +02 10 03.1836           ~ 1 0
314 CXOU J185734.0+020420 Y*O 18 57 34.058 +02 04 20.38           ~ 1 0
315 CXOU J185734.3+021217 Y*O 18 57 34.328 +02 12 18.36           ~ 1 0
316 2MASS J18573487+0204577 Y*O 18 57 34.87176 +02 04 57.7164           ~ 1 0
317 CXOU J185734.9+021712 Y*O 18 57 34.973 +02 17 12.05           ~ 1 0
318 CXOU J185736.2+020643 Y*O 18 57 36.262 +02 06 43.86           ~ 1 0
319 2MASS J18573659+0209243 Y*O 18 57 36.59448 +02 09 24.3612           ~ 1 0
320 2MASS J18573843+0207458 Y*O 18 57 38.43960 +02 07 45.8652           ~ 1 0
321 CXOU J185740.0+021036 Y*O 18 57 40.078 +02 10 36.23           ~ 1 0
322 2MASS J18574027+0210036 Y*O 18 57 40.2795835631 +02 10 03.682414327           ~ 2 0
323 2MASS J18574298+0213070 Y*O 18 57 42.98616 +02 13 07.0824           ~ 1 0
324 2MASS J18574559+0210466 Y*O 18 57 45.59664 +02 10 46.6788           ~ 1 0
325 CXOU J185747.7+020930 Y*O 18 57 47.790 +02 09 30.04           ~ 1 0
326 CXOU J185748.5+020941 Y*O 18 57 48.523 +02 09 41.20           ~ 1 0
327 2MASS J18575227+0210368 Y*O 18 57 52.27344 +02 10 36.8832           ~ 1 0
328 CXOU J185753.6+021113 Y*O 18 57 53.628 +02 11 13.48           ~ 1 0
329 SNR G035.2-01.8 SNR 19 01.6 +01 14           ~ 158 0
330 NAME Cep B cor 22 57 07.00 +62 37 22.3           ~ 87 0
331 NAME Ass Cep OB 3b As* 23 04.2 +63 24           ~ 22 0

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