2014MNRAS.437.1561R

Query : 2014MNRAS.437.1561R

2014MNRAS.437.1561R - Mon. Not. R. Astron. Soc., 437, 1561-1575 (2014/January-2)

The role of low-mass star clusters in forming the massive stars in DR 21.

RIVILLA V.M., JIMENEZ-SERRA I., MARTIN-PINTADO J. and SANZ-FORCADA J.

Abstract (from CDS):

We have studied the young low-mass pre-main sequence (PMS) stellar population associated with the massive star-forming region DR 21 by using archival X-ray Chandra observations and by complementing them with existing optical and infrared (IR) surveys. The Chandra observations have revealed for the first time a new highly extincted population of PMS low-mass stars previously missed in observations at other wavelengths. The X-ray population exhibits three main stellar density peaks, coincident with the massive star-forming regions, being the DR 21 core the main peak. The cross-correlated X-ray/IR sample exhibits a radial `Spokes-like' stellar filamentary structure that extends from the DR 21 core towards the northeast. The near-IR data reveal a centrally peaked structure for the extinction, which exhibits its maximum in the DR 21 core and gradually decreases with the distance to the N-S cloud axis and to the cluster centre. We find evidence of a global mass segregation in the full low-mass stellar cluster, and of a stellar age segregation, with the youngest stars still embedded in the N-S cloud, and more evolved stars more spatially distributed. The results are consistent with the scenario where an elongated overall potential well created by the full low-mass stellar cluster funnels gas through filaments feeding stellar formation. Besides the full gravitational well, smaller scale local potential wells created by dense stellar sub-clusters of low-mass stars are privileged in the competition for the gas of the common reservoir, allowing the formation of massive stars. We also discuss the possibility that a stellar collision in the very dense stellar cluster revealed by Chandra in the DR 21 core is the origin of the large-scale and highly energetic outflow arising from this region.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): stars: formation - stars: low-mass - stars: massive - stars: pre-main-sequence - galaxies: star clusters: general - X-rays: stars

VizieR on-line data: <Available at CDS (J/MNRAS/437/1561): table2.dat>

Nomenclature: Table 2: [RJM2014] NNN (Nos 1-281).

CDS comments: The star DR 21-D is not in Simbad (no coordinates).

Simbad objects: 300

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Number of rows : 300
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 NAME OMC-1 MoC 05 35 14 -05 22.4           ~ 1249 2
3 NAME Orion-KL SFR 05 35 14.16 -05 22 21.5           ~ 2421 1
4 NAME Orion Core ? 05 35 14.5 -05 22 30           ~ 212 0
5 NAME Orion Molecular Cloud MoC 05 56 -01.8           ~ 1227 1
6 IC 2162 HII 06 13 04.1 +17 58 44           ~ 372 2
7 NGC 2264 OpC 06 40 53.7 +09 52 32           ~ 1876 0
8 NGC 3372 HII 10 45 02.23 -59 41 59.8           ~ 1071 2
9 NAME Cyg X Cld 20 30 04.7973633 +40 51 36.002197           ~ 962 1
10 CXOU J203825.8+421606 Y*O 20 38 25.8148924200 +42 16 05.532129768           ~ 2 0
11 [RJM2014] 244 X 20 38 25.99 +42 20 11.2           ~ 1 0
12 [RJM2014] 256 X 20 38 26.00 +42 21 46.8           ~ 1 0
13 [RJM2014] 238 X 20 38 27.25 +42 20 22.9           ~ 1 0
14 SDSS J203828.64+422235.2 * 20 38 28.6273851576 +42 22 35.176930284           ~ 1 0
15 CXOU J203829.3+422129 Y*O 20 38 29.3723719824 +42 21 29.567156400           ~ 2 0
16 [RJM2014] 231 X 20 38 29.45 +42 21 28.1           ~ 1 0
17 [RJM2014] 259 X 20 38 30.16 +42 15 46.5           ~ 1 0
18 [RJM2014] 229 X 20 38 30.40 +42 21 53.4           ~ 1 0
19 CXOU J203831.1+421801 Y*O 20 38 31.1681981400 +42 18 01.772718012           ~ 2 0
20 [RJM2014] 265 X 20 38 31.24 +42 15 17.3           ~ 1 0
21 [RJM2014] 220 X 20 38 31.34 +42 21 13.3           ~ 1 0
22 [RJM2014] 264 X 20 38 31.42 +42 15 17.0           ~ 1 0
23 CXOU J203831.3+421428 Y*O 20 38 31.429 +42 14 28.88           ~ 2 0
24 CXOU J203832.8+422322 Y*O 20 38 32.8485988056 +42 23 22.648728876           ~ 2 0
25 [RJM2014] 207 X 20 38 32.94 +42 17 52.0           ~ 1 0
26 [RJM2014] 191 X 20 38 33.70 +42 20 19.1           ~ 1 0
27 CXOU J203833.8+421600 Y*O 20 38 33.813 +42 16 00.52           ~ 2 0
28 CXOU J203833.8+421830 Y*O 20 38 33.8699485800 +42 18 30.883572828           ~ 2 0
29 [RJM2014] 214 X 20 38 36.45 +42 22 52.2           ~ 1 0
30 CXOU J203836.4+422125 Y*O 20 38 36.5114438544 +42 21 25.869346092           ~ 2 0
31 [RJM2014] 162 X 20 38 37.22 +42 19 27.4           ~ 1 0
32 CXOU J203837.5+421913 Y*O 20 38 37.563 +42 19 13.89           ~ 2 0
33 UGPS J203838.89+422157.9 X 20 38 38.9057816040 +42 21 57.947816520           ~ 1 0
34 [RJM2014] 275 X 20 38 38.97 +42 25 40.2           ~ 1 0
35 [RJM2014] 228 X 20 38 39.14 +42 15 07.3           ~ 1 0
36 [RJM2014] 250 X 20 38 39.51 +42 24 48.8           ~ 1 0
37 2MASS J20383963+4217410 Y*O 20 38 39.6274532088 +42 17 41.173322352           ~ 3 0
38 2MASS J20383996+4224169 Y*O 20 38 39.9672599304 +42 24 16.963153920           ~ 3 0
39 [RJM2014] 236 X 20 38 40.01 +42 14 46.0           ~ 1 0
40 [RJM2014] 189 X 20 38 40.30 +42 22 51.5           ~ 1 0
41 CXOU J203840.5+421725 Y*O 20 38 40.584 +42 17 25.83           ~ 2 0
42 [RJM2014] 145 X 20 38 40.66 +42 18 53.1           ~ 1 0
43 CXOU J203841.0+421952 Y*O 20 38 41.034 +42 19 52.53           ~ 2 0
44 [RJM2014] 217 X 20 38 41.10 +42 15 24.3           ~ 1 0
45 [RJM2014] 168 X 20 38 41.12 +42 16 57.8           ~ 1 0
46 CXOU J203841.1+421555 Y*O 20 38 41.153 +42 15 55.91           ~ 2 0
47 CXOU J203841.3+422056 Y*O 20 38 41.318 +42 20 56.98           ~ 2 0
48 CXOU J203841.9+422512 Y*O 20 38 41.949 +42 25 12.25           ~ 2 0
49 CXOU J203841.9+421842 Y*O 20 38 41.950 +42 18 42.18           ~ 2 0
50 CXOU J203842.2+422104 Y*O 20 38 42.330 +42 21 04.51           ~ 2 0
51 CXOU J203842.9+421943 Y*O 20 38 43.009 +42 19 42.55           ~ 2 0
52 [RJM2014] 258 * 20 38 43.6439886024 +42 13 37.416114012           ~ 2 0
53 CXOU J203844.0+421421 Y*O 20 38 44.0800430016 +42 14 21.811732188           ~ 2 0
54 2MASS J20384409+4224127 Y*O 20 38 44.0955582816 +42 24 12.771277308           ~ 2 0
55 CXOU J203844.5+422209 Y*O 20 38 44.544 +42 22 09.29           ~ 2 0
56 [RJM2014] 240 X 20 38 44.74 +42 25 08.2           ~ 1 0
57 [RJM2014] 190 X 20 38 45.73 +42 23 44.4           ~ 1 0
58 CXOU J203846.3+421826 Y*O 20 38 46.325 +42 18 26.69           ~ 2 0
59 [RJM2014] 201 X 20 38 46.61 +42 24 16.2           ~ 1 0
60 CXOU J203846.7+421906 Y*O 20 38 46.720 +42 19 06.49           ~ 2 0
61 CXOU J203847.7+421500 Y*O 20 38 47.721 +42 15 00.67           ~ 2 0
62 [RJM2014] 255 X 20 38 48.24 +42 25 53.1           ~ 1 0
63 [RJM2014] 248 X 20 38 48.69 +42 13 34.6           ~ 1 0
64 CXOU J203850.0+421834 Y*O 20 38 49.987 +42 18 34.02           ~ 2 0
65 2MASS J20385002+4216401 Y*O 20 38 50.017 +42 16 40.09           ~ 3 0
66 [RJM2014] 79 X 20 38 50.20 +42 18 02.8           ~ 1 0
67 2MASS J20385046+4218099 Y*O 20 38 50.463 +42 18 09.95           G3.0 6 0
68 CXOU J203850.5+421922 Y*O 20 38 50.546 +42 19 22.35           ~ 2 0
69 CXOU J203850.7+421721 Y*O 20 38 50.790 +42 17 21.49           ~ 2 0
70 [RJM2014] 122 X 20 38 50.96 +42 22 25.0           ~ 1 0
71 [RJM2014] 197 X 20 38 51.45 +42 24 24.4           ~ 1 0
72 CXOU J203852.2+421843 Y*O 20 38 52.268 +42 18 43.59           ~ 2 0
73 CXOU J203852.3+422156 Y*O 20 38 52.344 +42 21 57.00           ~ 2 0
74 [RJM2014] 100 X 20 38 52.37 +42 22 14.6           ~ 1 0
75 CXOU J203852.7+422224 Y*O 20 38 52.785 +42 22 24.78           ~ 2 0
76 [RJM2014] 103 X 20 38 53.04 +42 22 20.1           ~ 1 0
77 CXOU J203853.0+422221 Y*O 20 38 53.075 +42 22 21.60           ~ 2 0
78 [RJM2014] 133 X 20 38 53.47 +42 22 58.6           ~ 1 0
79 CXOU J203853.5+421217 Y*O 20 38 53.595 +42 12 17.95           ~ 2 0
80 CXOU J203853.6+422201 Y*O 20 38 53.665 +42 22 01.66           ~ 2 0
81 CXOU J203853.7+422304 Y*O 20 38 53.774 +42 23 03.98           ~ 2 0
82 CXOU J203854.0+422307 Y*O 20 38 54.0186039576 +42 23 07.807184088           ~ 2 0
83 CXOU J203854.1+422125 Y*O 20 38 54.1265877408 +42 21 25.475719104           ~ 2 0
84 CXOU J203854.2+422521 Y*O 20 38 54.282 +42 25 21.61           ~ 2 0
85 CXOU J203854.4+422153 Y*O 20 38 54.407 +42 21 53.68           ~ 2 0
86 CXOU J203854.7+421348 Y*O 20 38 54.7652956152 +42 13 48.253450332           ~ 2 0
87 2MASS J20385484+4222307 Y*O 20 38 54.84288 +42 22 30.7020           ~ 3 0
88 CXOU J203854.8+422306 Y*O 20 38 54.912 +42 23 06.82           ~ 2 0
89 [RJM2014] 237 X 20 38 54.96 +42 25 41.3           ~ 1 0
90 [RJM2014] 187 X 20 38 54.97 +42 24 25.7           ~ 1 0
91 CXOU J203855.1+421836 Y*O 20 38 55.111 +42 18 36.10           ~ 2 0
92 2MASS J20385529+4221545 Y*O 20 38 55.2964314576 +42 21 54.491779188           ~ 2 0
93 [RJM2014] 70 X 20 38 55.39 +42 17 35.0           ~ 1 0
94 CXOU J203855.4+422037 Y*O 20 38 55.4299561872 +42 20 37.584420396           ~ 2 0
95 CXOU J203855.6+422237 Y*O 20 38 55.632 +42 22 36.88           ~ 2 0
96 CXOU J203855.9+422146 Y*O 20 38 55.941 +42 21 46.78           ~ 2 0
97 CXOU J203856.8+422248 Y*O 20 38 56.8384524960 +42 22 48.322499448           ~ 2 0
98 [RJM2014] 112 X 20 38 57.180 +42 22 41.37           ~ 1 0
99 [RJM2014] 165 X 20 38 57.34 +42 15 21.7           ~ 1 0
100 CXOU J203857.3+421710 Y*O 20 38 57.3523019712 +42 17 10.988073060           ~ 2 0
101 CXOU J203857.8+421558 Y*O 20 38 57.802 +42 15 58.02           ~ 2 0
102 2MASS J20385783+4214375 Y*O 20 38 57.830 +42 14 37.69           ~ 3 0
103 CXOU J203858.0+421954 Y*O 20 38 58.011 +42 19 54.23           ~ 2 0
104 CXOU J203858.0+421820 Y*O 20 38 58.012 +42 18 20.94           ~ 2 0
105 2MASS J20385810+4217561 Y*O 20 38 58.10016 +42 17 56.1120           ~ 3 0
106 CXOU J203858.2+422051 Y*O 20 38 58.210 +42 20 51.98           ~ 2 0
107 CXOU J203858.3+422009 Y*O 20 38 58.383 +42 20 09.30           ~ 2 0
108 [RJM2014] 210 X 20 38 58.55 +42 25 02.5           ~ 1 0
109 CXOU J203858.5+422250 Y*O 20 38 58.608 +42 22 50.60           ~ 2 0
110 CXOU J203858.6+422048 Y*O 20 38 58.661 +42 20 48.54           ~ 2 0
111 CXOU J203858.6+422241 Y*O 20 38 58.675 +42 22 41.80           ~ 2 0
112 CXOU J203859.0+422040 Y*O 20 38 59.033 +42 20 40.50           ~ 2 0
113 2MASS J20385908+4219394 NIR 20 38 59.08 +42 19 39.5           ~ 3 0
114 [RJM2014] 61 X 20 38 59.11 +42 21 28.7           ~ 1 0
115 CXOU J203859.1+421859 Y*O 20 38 59.166 +42 18 59.26           ~ 2 0
116 CXOU J203859.3+422228 Y*O 20 38 59.316 +42 22 28.79           ~ 3 0
117 CXOU J203859.3+422011 Y*O 20 38 59.345 +42 20 11.73           ~ 2 0
118 [RJM2014] 6 X 20 38 59.55 +42 19 33.3           ~ 1 0
119 CXOU J203859.6+422239 Y*O 20 38 59.57 +42 22 40.2           ~ 3 0
120 CXOU J203859.6+421953 Y*O 20 38 59.610 +42 19 53.30           ~ 2 0
121 CXOU J203859.7+422305 Y*O 20 38 59.788 +42 23 05.94           ~ 2 0
122 2MASS J20385982+4218580 Y*O 20 38 59.82312 +42 18 58.0752           ~ 4 0
123 CXOU J203859.9+422018 Y*O 20 38 59.942 +42 20 18.15           ~ 2 0
124 CXOU J203859.9+422159 Y*O 20 38 59.956 +42 21 59.57           ~ 3 0
125 CXOU J203859.9+421944 Y*O 20 38 59.964 +42 19 44.69           ~ 2 0
126 2MASS J20390005+4219364 Y*O 20 39 00.050 +42 19 36.54           ~ 3 0
127 CXOU J203900.0+421855 Y*O 20 39 00.100 +42 18 55.02           ~ 2 0
128 [RJM2014] 10 X 20 39 00.12 +42 19 51.6           ~ 1 0
129 CXOU J203900.1+422016 Y*O 20 39 00.192 +42 20 16.31           ~ 2 0
130 [RJM2014] 193 X 20 39 00.26 +42 24 36.8           ~ 1 0
131 GAL 081.74+00.59 cor 20 39 00.37 +42 24 36.6           ~ 27 0
132 CXOU J203900.3+421930 Y*O 20 39 00.372 +42 19 30.82           ~ 2 0
133 CXOU J203900.4+422252 Y*O 20 39 00.421 +42 22 52.54           ~ 3 0
134 CXOU J203900.4+421958 Y*O 20 39 00.448 +42 19 58.85           ~ 2 0
135 [RJM2014] 182 X 20 39 00.51 +42 24 22.9           ~ 1 0
136 [RJM2014] 192 X 20 39 00.55 +42 24 35.0           ~ 1 0
137 CXOU J203900.5+421936 Y*O 20 39 00.590 +42 19 36.69           ~ 2 0
138 CXOU J203900.8+422050 Y*O 20 39 00.816 +42 20 50.68           ~ 2 0
139 [RJM2014] 164 Y*O 20 39 00.853 +42 23 53.72           ~ 2 0
140 CXOU J203900.9+422231 Y*O 20 39 00.885 +42 22 31.89           ~ 3 0
141 SSTCYGX J203900.90+422243.8 * 20 39 00.8894938032 +42 22 43.666691592           ~ 1 0
142 [RJM2014] 5 X 20 39 00.92 +42 19 41.4           ~ 1 0
143 MIRES G081.7126+00.5643 Y*? 20 39 00.96 +42 22 07.9           ~ 3 0
144 DR 21 (OH) cor 20 39 01.01 +42 22 50.2           ~ 427 0
145 CXOU J203901.0+421954 Y*O 20 39 01.041 +42 19 54.40           ~ 2 0
146 [BMC2010] CygX-N48 MM2 mm 20 39 01.10 +42 22 08.3           ~ 6 0
147 CXOU J203901.1+421944 Y*O 20 39 01.114 +42 19 44.33           ~ 2 0
148 [RJM2014] 14 X 20 39 01.19 +42 19 18.9           ~ 1 0
149 [RJM2014] 15 X 20 39 01.21 +42 19 18.6           ~ 1 0
150 [DKS2007] 36 HII 20 39 01.21 +42 19 54.0           ~ 11 0
151 CXOU J203901.2+421936 Y*O 20 39 01.287 +42 19 36.25           ~ 2 0
152 [BMC2010] CygX-N48 MM1 mm 20 39 01.34 +42 22 04.9           ~ 6 0
153 [CLZ2017] Cyg-N48 cor 20 39 01.36 +42 22 06.7           ~ 23 0
154 [RJM2014] 17 X 20 39 01.37 +42 19 59.1           ~ 1 0
155 CXOU J203901.5+422526 Y*O 20 39 01.512 +42 25 26.23           ~ 2 0
156 DR 21 SFR 20 39 01.6 +42 19 38           O4.5 1121 0
157 CXOU J203901.6+421804 Y*O 20 39 01.657 +42 18 04.69           ~ 2 0
158 CXOU J203901.6+421909 Y*O 20 39 01.667 +42 19 09.33           ~ 2 0
159 [RJM2014] 16 X 20 39 01.68 +42 19 54.9           ~ 1 0
160 CXOU J203901.7+422028 Y*O 20 39 01.7679372864 +42 20 28.932485532           ~ 2 0
161 CXOU J203901.7+421840 Y*? 20 39 01.77 +42 18 40.2           ~ 2 0
162 CXOU J203901.7+421913 Y*O 20 39 01.794 +42 19 13.58           ~ 2 0
163 CXOU J203901.9+422315 Y*O 20 39 01.9095431376 +42 23 15.564891228           ~ 2 0
164 CXOU J203901.9+422157 Y*O 20 39 01.925 +42 21 57.05           ~ 2 0
165 MSX6C G081.7522+00.5906 Y*O 20 39 01.9930 +42 24 59.290           ~ 36 0
166 CXOU J203902.0+422021 Y*O 20 39 02.043 +42 20 21.53           ~ 3 0
167 [RJM2014] 202 X 20 39 02.07 +42 24 54.1           ~ 1 0
168 CXOU J203902.1+422200 Y*O 20 39 02.139 +42 22 00.00           ~ 3 0
169 CXOU J203902.1+422459 Y*O 20 39 02.194 +42 24 59.14           ~ 2 0
170 2MASS J20390228+4217507 Y*O 20 39 02.28096 +42 17 50.7408           ~ 3 0
171 CXOU J203902.3+422648 Y*O 20 39 02.302 +42 26 48.28           ~ 3 0
172 CXOU J203902.3+422158 Y*O 20 39 02.335 +42 21 58.85           ~ 3 0
173 CXOU J203902.3+421953 Y*O 20 39 02.393 +42 19 53.26           ~ 2 0
174 CXOU J203902.4+422300 Y*O 20 39 02.448 +42 22 59.72           ~ 2 0
175 CXOU J203902.4+421629 Y*O 20 39 02.470 +42 16 29.78           ~ 2 0
176 CXOU J203902.5+421925 Y*O 20 39 02.588 +42 19 25.22           ~ 2 0
177 CXOU J203902.7+421604 Y*O 20 39 02.7154049064 +42 16 04.017785988           ~ 2 0
178 CXOU J203902.7+421842 Y*O 20 39 02.795 +42 18 42.45           ~ 2 0
179 2MASS J20390285+4222001 Y*O 20 39 02.85336 +42 22 00.1992           ~ 11 0
180 CXOU J203902.9+422415 Y*O 20 39 02.923 +42 24 15.25           ~ 2 0
181 [RJM2014] 204 X 20 39 02.95 +42 24 55.4           ~ 1 0
182 [BMC2010] CygX-N53 MM1 mm 20 39 02.96 +42 25 51.0           ~ 8 0
183 NAME W 75S FIR 3 Y*O 20 39 02.97 +42 25 52.5           ~ 21 0
184 [CLZ2017] Cyg-N53 cor 20 39 03.2 +42 25 49           ~ 19 0
185 [BMC2010] CygX-N53 MM2 mm 20 39 03.22 +42 25 51.2           ~ 17 0
186 CXOU J203903.2+421843 Y*O 20 39 03.235 +42 18 43.84           ~ 2 0
187 CXOU J203903.3+422238 Y*O 20 39 03.355 +42 22 38.23           ~ 3 0
188 CXOU J203903.4+422011 Y*O 20 39 03.417 +42 20 11.71           ~ 3 0
189 [RJM2014] 227 X 20 39 03.48 +42 25 30.4           ~ 1 0
190 CXOU J203903.6+422529 Y*O 20 39 03.619 +42 25 29.84           ~ 2 0
191 CXOU J203903.6+421923 Y*O 20 39 03.685 +42 19 23.19           ~ 2 0
192 CXOU J203903.8+421658 Y*O 20 39 03.814 +42 16 58.31           ~ 2 0
193 2MASS J20390395+4222563 Y*O 20 39 03.95616 +42 22 56.3268           ~ 3 0
194 2MASS J20390405+4225404 Y*O 20 39 04.05456 +42 25 40.4076           ~ 3 0
195 CXOU J203904.0+421935 Y*O 20 39 04.061 +42 19 35.43           ~ 2 0
196 CXOU J203904.2+421958 Y*O 20 39 04.221 +42 19 58.74           ~ 3 0
197 CXOU J203904.6+421520 Y*O 20 39 04.680 +42 15 20.84           ~ 2 0
198 [RJM2014] 42 X 20 39 04.70 +42 18 49.0           ~ 1 0
199 SDSS J203904.86+421513.4 Y*O 20 39 04.8622865688 +42 15 13.447746108           ~ 3 0
200 CXOU J203904.8+422033 Y*O 20 39 04.862 +42 20 33.50           ~ 2 0
201 2MASS J20390492+4222167 Y*O 20 39 04.908 +42 22 16.82           ~ 4 0
202 [RJM2014] 239 X 20 39 05.40 +42 25 42.4           ~ 1 0
203 [RJM2014] 47 X 20 39 05.41 +42 20 27.0           ~ 1 0
204 CXOU J203905.4+422015 Y*O 20 39 05.472 +42 20 15.22           ~ 2 0
205 CXOU J203905.5+421950 Y*O 20 39 05.530 +42 19 50.30           ~ 2 0
206 CXOU J203905.5+421746 Y*O 20 39 05.559 +42 17 46.88           ~ 2 0
207 [RJM2014] 158 X 20 39 05.648 +42 15 35.63           ~ 1 0
208 CXOU J203905.7+422055 Y*O 20 39 05.775 +42 20 55.66           ~ 2 0
209 CXOU J203906.1+421919 Y*O 20 39 06.130 +42 19 19.55           ~ 2 0
210 [RJM2014] 186 X 20 39 06.37 +42 24 21.4           ~ 1 0
211 [RJM2014] 172 X 20 39 06.56 +42 23 58.9           ~ 1 0
212 [RJM2014] 146 X 20 39 06.70 +42 16 07.5           ~ 1 0
213 CXOU J203906.7+422101 Y*O 20 39 06.754 +42 21 01.86           ~ 2 0
214 CXOU J203907.0+422208 Y*O 20 39 07.0316251656 +42 22 08.230234116           ~ 3 0
215 2MASS J20390740+4220552 Y*O 20 39 07.40304 +42 20 55.2696           ~ 4 0
216 CXOU J203907.4+422335 Y*O 20 39 07.435 +42 23 34.86           ~ 2 0
217 [RJM2014] 263 X 20 39 07.66 +42 26 20.1           ~ 1 0
218 CXOU J203907.8+421752 Y*O 20 39 07.872 +42 17 52.92           ~ 2 0
219 CXOU J203907.9+421959 Y*O 20 39 07.910 +42 19 59.53           ~ 2 0
220 CXOU J203908.0+421459 Y*O 20 39 07.9844842032 +42 14 59.496120744           ~ 2 0
221 2MASS J20390804+4217276 Y*O 20 39 08.04528 +42 17 27.6684           ~ 3 0
222 CXOU J203908.1+422111 Y*O 20 39 08.189 +42 21 12.20           ~ 2 0
223 2MASS J20390869+4224501 Y*O 20 39 08.69904 +42 24 50.1984           ~ 3 0
224 [RJM2014] 123 X 20 39 08.87 +42 16 45.5           ~ 1 0
225 CXOU J203909.6+421708 Y*O 20 39 09.625 +42 17 08.73           ~ 2 0
226 CXOU J203909.6+422042 Y*O 20 39 09.642 +42 20 42.79           ~ 3 0
227 [RJM2014] 268 X 20 39 10.20 +42 12 42.2           ~ 1 0
228 CXOU J203910.2+421902 Y*O 20 39 10.2607379496 +42 19 02.789637132           ~ 2 0
229 CXOU J203910.4+422205 Y*O 20 39 10.439 +42 22 05.35           ~ 2 0
230 CXOU J203910.5+422139 Y*O 20 39 10.555 +42 21 39.06           ~ 2 0
231 CXOU J203910.6+421619 Y*O 20 39 10.6657133592 +42 16 19.175976300           ~ 2 0
232 [RJM2014] 251 X 20 39 11.01 +42 25 47.4           ~ 1 0
233 [RJM2014] 63 X 20 39 11.06 +42 19 55.0           ~ 1 0
234 [RJM2014] 131 X 20 39 11.67 +42 16 46.1           ~ 1 0
235 CXOU J203911.7+421904 Y*O 20 39 11.7594510288 +42 19 04.101994092           ~ 2 0
236 2MASS J20391194+4216360 Y*O 20 39 11.9409356208 +42 16 36.115137336           ~ 5 0
237 CXOU J203912.1+422142 Y*O 20 39 12.130 +42 21 42.58           ~ 2 0
238 CXOU J203912.2+421527 Y*O 20 39 12.305 +42 15 27.27           ~ 2 0
239 SDSS J203912.96+421342.7 Y*O 20 39 12.9698613600 +42 13 42.640573584           ~ 3 0
240 2MASS J20391302+4216214 Y*O 20 39 13.02072 +42 16 21.4500           ~ 3 0
241 CXOU J203913.2+421818 Y*O 20 39 13.1986012296 +42 18 17.993438532           ~ 2 0
242 [RJM2014] 155 X 20 39 13.30 +42 22 50.0           ~ 1 0
243 [RJM2014] 209 X 20 39 13.67 +42 24 26.6           ~ 1 0
244 CXOU J203913.7+422119 Y*O 20 39 13.710 +42 21 19.25           ~ 2 0
245 CXOU J203913.7+422146 Y*O 20 39 13.769 +42 21 46.85           ~ 2 0
246 CXOU J203913.8+421909 Y*O 20 39 13.8702254304 +42 19 09.087275964           ~ 2 0
247 CXOU J203914.1+421652 Y*O 20 39 14.1547932816 +42 16 52.087486944           ~ 2 0
248 [RJM2014] 87 X 20 39 14.33 +42 19 56.1           ~ 1 0
249 CXOU J203914.5+422157 Y*O 20 39 14.525 +42 21 57.77           ~ 2 0
250 [RJM2014] 196 X 20 39 15.56 +42 15 28.2           ~ 1 0
251 MPCM J203915.57+421711.2 * 20 39 15.5802931584 +42 17 11.159876436           ~ 2 1
252 CXOU J203915.6+421948 Y*O 20 39 15.628 +42 19 48.14           ~ 3 0
253 [RJM2014] 135 X 20 39 15.77 +42 17 28.2           ~ 1 0
254 [RJM2014] 279 X 20 39 15.95 +42 12 47.5           ~ 1 0
255 CXOU J203915.9+421711 Y*O 20 39 15.963 +42 17 11.86           ~ 2 0
256 CXOU J203916.3+422257 Y*O 20 39 16.296 +42 22 56.59           ~ 3 0
257 [RJM2014] 273 X 20 39 16.497 +42 26 09.42           ~ 1 0
258 2MASS J20391674+4219195 Y*O 20 39 16.7411792304 +42 19 19.510349700           ~ 7 0
259 [RJM2014] 219 X 20 39 16.95 +42 24 15.8           ~ 1 0
260 [RJM2014] 262 X 20 39 17.49 +42 13 33.9           ~ 1 0
261 CXOU J203917.5+422300 Y*O 20 39 17.5390217640 +42 23 00.097246572           ~ 2 0
262 CXOU J203917.8+422244 Y*O 20 39 17.841 +42 22 44.24           ~ 2 0
263 [RJM2014] 224 X 20 39 18.17 +42 14 48.4           ~ 1 0
264 CXOU J203918.7+422248 Y*O 20 39 18.706 +42 22 48.24           ~ 2 0
265 [RJM2014] 144 X 20 39 19.08 +42 20 52.4           ~ 1 0
266 CXOU J203919.5+422042 Y*O 20 39 19.512 +42 20 42.80           ~ 2 0
267 [RJM2014] 200 X 20 39 19.86 +42 23 23.2           ~ 1 0
268 CXOU J203919.9+421913 Y*O 20 39 19.995 +42 19 13.10           ~ 3 0
269 CXOU J203921.3+422327 Y*O 20 39 21.373 +42 23 27.69           ~ 2 0
270 CXOU J203921.3+422159 Y*O 20 39 21.4047174768 +42 21 59.697806400           ~ 2 0
271 CXOU J203921.5+421750 Y*O 20 39 21.533 +42 17 51.48           ~ 2 0
272 CXOU J203921.7+422039 Y*O 20 39 21.7731518712 +42 20 39.664767156           ~ 2 0
273 [RJM2014] 241 X 20 39 21.83 +42 24 29.4           ~ 1 0
274 CXOU J203922.1+421610 Y*O 20 39 22.1220458160 +42 16 10.960825944           ~ 2 0
275 [RJM2014] 252 X 20 39 23.36 +42 14 45.3           ~ 1 0
276 [RJM2014] 276 X 20 39 23.55 +42 13 48.4           ~ 1 0
277 ZTF J203923.71+421331.9 RS* 20 39 23.7181738512 +42 13 31.880376732           ~ 3 0
278 CXOU J203923.9+421746 Y*O 20 39 23.981 +42 17 46.01           ~ 2 0
279 2MASS J20392395+4216348 Y*O 20 39 23.9867509320 +42 16 34.882418928           ~ 5 0
280 SDSS J203924.05+422451.4 EB* 20 39 24.0592524576 +42 24 51.496631604           ~ 2 0
281 [RJM2014] 261 X 20 39 24.18 +42 24 50.5           ~ 1 0
282 2MASS J20392424+4216211 Y*O 20 39 24.2445583152 +42 16 21.046458864           ~ 3 0
283 [RJM2014] 174 X 20 39 24.77 +42 18 58.9           ~ 1 0
284 [RJM2014] 216 X 20 39 24.84 +42 16 32.6           ~ 1 0
285 [RJM2014] 180 X 20 39 24.97 +42 18 21.1           ~ 1 0
286 CXOU J203925.5+421428 Y*O 20 39 25.517 +42 14 28.82           ~ 3 0
287 2MASS J20392580+4220570 Y*O 20 39 25.80024 +42 20 57.0012           ~ 3 0
288 CXOU J203925.9+421850 Y*O 20 39 25.987 +42 18 50.23           ~ 2 0
289 [RJM2014] 257 X 20 39 27.22 +42 24 06.8           ~ 1 0
290 CXOU J203927.2+421428 Y*O 20 39 27.2209341048 +42 14 28.298935145           ~ 3 0
291 [RJM2014] 269 X 20 39 27.33 +42 14 30.3           ~ 1 0
292 [RJM2014] 274 X 20 39 27.35 +42 24 48.7           ~ 1 0
293 CXOU J203927.6+421543 Y*O 20 39 27.590 +42 15 43.42           ~ 2 0
294 CXOU J203928.2+422054 Y*O 20 39 28.3066128408 +42 20 54.353607828           ~ 2 0
295 CXOU J203929.5+421907 Y*O 20 39 29.599 +42 19 07.15           ~ 2 0
296 [RJM2014] 245 X 20 39 33.88 +42 20 58.6           ~ 1 0
297 [RJM2014] 243 X 20 39 34.13 +42 20 26.2           ~ 1 0
298 CXOU J203934.2+421813 Y*O 20 39 34.2105306072 +42 18 13.726135152           ~ 2 0
299 CXOU J203936.2+421715 Y*O 20 39 36.283 +42 17 15.30           ~ 3 0
300 [RJM2014] 271 X 20 39 38.24 +42 18 04.9           ~ 1 0

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