2011MNRAS.415..103B

Query : 2011MNRAS.415..103B

2011MNRAS.415..103B - Mon. Not. R. Astron. Soc., 415, 103-132 (2011/July-3)

T Tauri candidates and accretion rates using IPHAS: method and application to IC 1396.

BARENTSEN G., VINK J.S., DREW J.E., GREIMEL R., WRIGHT N.J., DRAKE J.J., MARTIN E.L., VALDIVIELSO L. and CORRADI R.L.M.

Abstract (from CDS):

The Isaac Newton Telescope (INT) Photometric H-Alpha Survey (IPHAS) is a 1800 deg2 survey of the Northern Galactic Plane, reaching down to r'∼ 21. We demonstrate how the survey can be used to (1) reliably select classical T Tauri star candidates and (2) constrain the mass accretion rates with an estimated relative uncertainty of 0.6 dex. IPHAS is a necessary addition to spectroscopic surveys because it allows large and uniform samples of accretion rates to be obtained with a precise handle on the selection effects.

We apply the method on a region of 7 deg2 towards the H II region IC 1396 in Cepheus OB2 and identify 158 pre-main-sequence candidates with masses between 0.2 and 2.0 M☉ and accretion rates between 10–9.2 and 10–7.0 M☉/yr. We find a power-law dependency between the stellar mass and the accretion rates with a slope of α= 1.1 ± 0.2, which is less steep than indicated by previous studies. We discuss the influence of method-dependent systematic effects on the determination of this relationship.

The majority of our sample consists of faint, previously unknown, low-mass T Tauri candidates (56 per cent between 0.2 and 0.5 M☉). Many candidates are clustered in front of three bright-rimmed molecular clouds, which are being ionized by the massive star HD 206267 (O6.5V). We discover a spatio-temporal gradient of increasing accretion rates, increasing Spitzer infrared excess, and younger ages away from the ionizing star, providing a strong indication that the formation of these clusters has been sequentially triggered by HD 206267 during the last ∼1 Myr.


Abstract Copyright: 2011 The Authors Monthly Notices of the Royal Astronomical Society2011 RAS

Journal keyword(s): accretion, accretion discs - stars: pre-main-sequence - stars: variables: T Tauri, Herbig Ae/Be - open clusters and associations: individual: IC 1396

VizieR on-line data: <Available at CDS (J/MNRAS/415/103): tableb1.dat tablec1.dat tabled1.dat tablee1.dat>

Nomenclature: Tables B1, C1: [BVD2011] NNN (Nos 1-158).

Simbad objects: 197

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Number of rows : 197
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 Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
2 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
3 NAME Chamaeleon Region SFR 11 55 -78.0           ~ 887 0
4 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
5 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 1023 0
6 [BVD2011] 1 Or* 21 30 08.5719333216 +57 57 27.447366852           ~ 3 0
7 [BVD2011] 2 Or* 21 32 37.1150934864 +58 32 41.711991504           ~ 4 0
8 V* LT Cep Ae* 21 33 17.7796863192 +57 48 13.465964664   16.87 15.72 15.43   F3 13 0
9 [BVD2011] 4 Or* 21 33 24.8172381240 +57 50 22.915429296           ~ 4 0
10 IPHAS J213412.45+562519.6 Em* 21 34 12.45 +56 25 19.6           ~ 1 0
11 2MASS J21341513+5647342 Y*O 21 34 15.1343042016 +56 47 34.248812172           ~ 3 0
12 [BVD2011] 5 Or* 21 34 50.8829002224 +58 35 34.640114496           ~ 5 0
13 [BVD2011] 6 Or* 21 34 51.6970464408 +57 51 40.545088308           ~ 6 0
14 [BVD2011] 7 Or* 21 34 53.0739618096 +57 51 25.192022508           ~ 4 0
15 2MASS J21345422+5624064 Em* 21 34 54.2236529808 +56 24 06.388573932           ~ 1 0
16 2MASS J21345964+5803257 Y*O 21 34 59.6584126272 +58 03 25.877658996           ~ 3 0
17 2MASS J21350276+5727470 Y*O 21 35 02.7818328936 +57 27 46.996805232           ~ 3 0
18 [BVD2011] 8 Or* 21 35 10.1541553704 +56 50 22.682830740           ~ 3 0
19 [BVD2011] 9 Or* 21 35 10.2202246920 +57 31 47.478917424           ~ 5 0
20 [SHB2004] Trumpler 37 72-1427 TT* 21 35 16.2853198344 +57 28 22.189902528 20.176   18.272 16.618 15.161 M1 16 0
21 [BVD2011] 11 Or* 21 35 16.8899927016 +57 32 42.256558536           ~ 8 0
22 [SHB2004] Trumpler 37 81-541 TT* 21 35 17.4651628992 +57 48 22.331065968 20.511   17.605 16.086 14.598 K5.5 10 0
23 [SHB2004] Trumpler 37 73-472 TT* 21 35 18.6202256232 +57 34 09.125950224     16.85 15.75 14.80 K5 19 0
24 2MASS J21352069+5610490 WD* 21 35 20.6932999872 +56 10 49.259297892 16.1 17.0       D 12 0
25 [BVD2011] 14 Or* 21 35 23.7596427672 +56 06 00.288870732           ~ 3 0
26 [BVD2011] 15 Or* 21 35 24.4176823224 +57 30 08.502603804           ~ 8 0
27 [SHB2004] Trumpler 37 73-311 TT* 21 35 24.5179946904 +57 33 01.130080032     18.38 17.13 15.89 M1.5 15 0
28 [BVD2011] 17 Or* 21 35 27.2381023008 +57 31 30.077707404           ~ 8 0
29 [BVD2011] 18 Or* 21 35 28.4172691536 +57 58 23.113572708           M4 6 0
30 [BVD2011] 19 Or* 21 35 31.3632755472 +57 31 27.847309260           ~ 8 0
31 [BVD2011] 20 Or* 21 35 31.7443020648 +58 28 00.477174000           ~ 7 0
32 [BVD2011] 21 Or* 21 35 32.8939550640 +57 31 59.555522280           ~ 9 0
33 [BVD2011] 22 Em* 21 35 45.869 +57 36 40.11           M4 4 0
34 IPHAS J213557.95+572532.2 Em* 21 35 57.9692396376 +57 25 32.225813472           ~ 1 0
35 NAME Elephant Trunk Nebula MoC 21 36 +57.4           ~ 58 0
36 [BVD2011] 23 Or* 21 36 02.7944828808 +57 55 12.758696004           ~ 4 0
37 [BVD2011] 24 Y*O 21 36 03.2207603589 +58 02 07.845936797           ~ 4 0
38 [BVD2011] 25 Or* 21 36 07.9253663568 +58 04 10.932799692           ~ 4 0
39 [BVD2011] 26 Or* 21 36 13.4850283728 +58 19 22.621329228           ~ 4 0
40 [MSR2009] IC1396A-14 TT* 21 36 25.0829182032 +57 27 50.240875068 21.833   20.426 18.578   M0 14 0
41 2MASS J21362692+5702137 Y*O 21 36 26.9258958048 +57 02 13.680845880           ~ 3 0
42 [BVD2011] 28 Or* 21 36 28.4224947744 +57 42 51.640111548           ~ 5 0
43 IPHAS J213636.44+572812.2 Em* 21 36 36.44 +57 28 12.2           ~ 1 0
44 2MASS J21364647+5627166 Y*O 21 36 46.4802083928 +56 27 16.600600116           ~ 3 0
45 [BVD2011] 29 Or* 21 36 47.4413396424 +58 04 42.598213788           ~ 4 0
46 [MSR2009] IC1396A-61 TT* 21 36 47.6305123800 +57 29 54.046537548     18.47   15.06 K6 17 0
47 [BVD2011] 31 Em* 21 36 51.542 +57 48 06.78           ~ 2 0
48 [BVD2011] 32 Or* 21 36 57.4618325400 +57 27 30.310164648           ~ 7 0
49 [MSR2009] IC1396A-38 TT* 21 36 57.6721143408 +57 27 33.140300940 18.684   16.92 15.211 13.999 K6 25 0
50 [BVD2011] 34 Or* 21 36 59.1081819672 +57 39 05.633341812           K5.5e 6 0
51 [MSR2009] IC1396A-43 TT* 21 36 59.4741074424 +57 31 34.866414624           M0 12 0
52 [SHB2004] Trumpler 37 14-287 TT* 21 37 06.5040618744 +57 32 31.822462284 18.858   17.258 15.763 15.17 M0 13 0
53 [SHB2004] Trumpler 37 11-2037 TT* 21 37 07.0355466816 +57 27 00.832158108 18.871   16.03 15.09 13.687 K4.5 24 0
54 [BVD2011] 38 Y*O 21 37 09.0997234416 +57 25 48.557293896     19.36   16.30 ~ 9 0
55 [MSR2009] IC1396A-53 Or* 21 37 09.3677077704 +57 29 48.429415824     17.50   14.75 ~ 14 0
56 2MASS J21371009+5641376 Y*O 21 37 10.0846895136 +56 41 37.748322960           ~ 3 0
57 [BVD2011] 40 Or* 21 37 13.8962900784 +57 27 27.072157680           ~ 7 0
58 [BVD2011] 41 Or* 21 37 16.3598398896 +57 26 40.398777924     18.64   16.12 K7.0e 12 0
59 [BVD2011] 42 Or* 21 37 17.1543923280 +57 28 47.369963496           ~ 5 0
60 [MSR2009] IC1396A-63 Or* 21 37 17.4249920280 +57 29 27.342595176           ~ 12 0
61 [BVD2011] 44 TT* 21 37 24.1021881600 +57 24 11.394376920           K5.5e 14 0
62 [BVD2011] 45 Or* 21 37 24.7664759688 +57 29 08.958953076     20.05   16.27 ~ 6 0
63 [BVD2011] 46 Or* 21 37 25.4923522680 +57 27 45.285850908     19.83   15.77 ~ 4 0
64 2MASS J21373314+5718130 Y*O 21 37 33.1561309800 +57 18 12.788735724           ~ 3 0
65 [BVD2011] 47 Or* 21 37 34.6511163456 +57 16 57.736948152           M1.0e 9 0
66 [BVD2011] 48 Or* 21 37 35.7209580456 +57 32 58.446749256           M2.0e 7 0
67 [SHB2004] Trumpler 37 14-183 Or* 21 37 38.5106073936 +57 31 40.850378472 19.838   16.61 15.648 14.431 K7.0(K5) 20 0
68 2MASS J21373865+5637315 Y*O 21 37 38.6879802648 +56 37 31.407017520           ~ 3 0
69 [BVD2011] 50 TT* 21 37 42.7666018848 +57 33 25.152355368     17.48   15.25 F9 17 0
70 [BVD2011] 51 Em* 21 37 42.885 +57 34 46.18           ~ 4 0
71 [SHB2004] Trumpler 37 11-383 TT* 21 37 45.1515981504 +57 19 42.223645020     17.61 16.49 15.35 K5 18 0
72 2MASS J21374543+5646572 Em* 21 37 45.4335960888 +56 46 57.559857996           ~ 1 0
73 2MASS J21374573+5653226 Y*O 21 37 45.7374926496 +56 53 22.745601168           ~ 3 0
74 [BVD2011] 53 Or* 21 37 46.1282224896 +57 34 28.135820352           ~ 6 0
75 [BVD2011] 54 Or* 21 37 47.9721734184 +57 32 42.376340112           M1.0e 12 0
76 IPHAS J213748.05+563637.7 Em* 21 37 48.0622628040 +56 36 37.649503116           ~ 1 0
77 [BVD2011] 55 TT* 21 37 48.9494768160 +57 23 20.879850372           K5.0e 9 0
78 [SHB2004] Trumpler 37 12-1091 TT* 21 37 57.6268205592 +57 22 47.639301456 19.710   16.274 14.984 13.984 G2.5 21 0
79 [SHB2004] Trumpler 37 13-1238 TT* 21 37 59.2566891816 +57 36 16.120800936 19.259   17.902 16.337 14.601 M1 15 0
80 2MASS J21380010+5738558 Y*O 21 38 00.0988799040 +57 38 55.884832404           ~ 3 0
81 IPHAS J213808.15+564425.2 WD* 21 38 08.1405527260 +56 44 25.153602411           DB 3 0
82 [SHB2004] Trumpler 37 13-1426 TT* 21 38 08.5594089624 +57 37 07.644645480 19.858   19.174 17.599 15.748 M0 18 0
83 [BVD2011] 59 TT* 21 38 09.2558332296 +57 20 19.889766492           ~ 12 0
84 [BVD2011] 60 Em* 21 38 10.007 +57 23 52.78           M2.0e 3 0
85 [BVD2011] 61 Or* 21 38 11.3688198384 +58 53 17.316242844           ~ 3 0
86 [BVD2011] 62 Or* 21 38 12.6484794480 +57 20 33.638811360           K7.0e 12 0
87 [SHB2004] Trumpler 37 13-1877 TT* 21 38 17.03 +57 39 26.6 18.883   17.189 15.620 14.222 K7 11 0
88 [BVD2011] 64 Or* 21 38 22.8197399016 +57 40 17.324654988           M0.0e 8 0
89 Cl* IC 1396 SBZ 2-63 Or* 21 38 23.4104591352 +56 53 01.687237764           ~ 4 0
90 [BVD2011] 66 Or* 21 38 23.9056462608 +56 53 04.059058956           ~ 4 0
91 [BVD2011] 67 Or* 21 38 23.9530989096 +57 27 36.203888016           M1.0e 5 0
92 [BVD2011] 68 Or* 21 38 25.8312204768 +57 42 07.666376040           K2.0e 11 0
93 [SHB2004] Trumpler 37 13-236 TT* 21 38 27.4355992128 +57 31 08.147300376 17.665   15.546 14.431 13.412 K2 25 0
94 [SHB2004] Trumpler 37 12-2113 TT* 21 38 27.4440026385 +57 27 20.637220350 18.79   17.14 16.019 14.67 K6 17 0
95 [BVD2011] 71 Or* 21 38 30.3183253968 +57 32 55.190830452           M1.0e 7 0
96 [BVD2011] 72 TT* 21 38 32.1705111120 +57 26 35.904618708 21.598   19.911 18.202 16.287 M0 11 0
97 [BVD2011] 73 Or* 21 38 37.4502887808 +57 30 20.612834892     16.517   15.24 ~ 12 0
98 2MASS J21384001+5739303 TT* 21 38 40.018 +57 39 30.34     18.16 17.06 15.89 M0 8 0
99 2MASS J21384446+5718091 TT* 21 38 44.4751678176 +57 18 09.091587744 18.539   16.571 15.299 14.437 K5.5 19 0
100 IC 1396 OpC 21 38 51.4 +57 31 52           ~ 523 1
101 [BVD2011] 76 Or* 21 38 55.2420444840 +57 22 37.397612136           ~ 3 0
102 HD 206267 Y*O 21 38 57.6195772032 +57 29 20.554016280 5.09 5.83 5.62   5.56 O6.0V((f))+O9:V 520 0
103 2MASS J21385807+5743343 TT* 21 38 58.0791715416 +57 43 34.422069684 19.777   17.141 15.732 14.546 K6.5 18 0
104 [BVD2011] 78 Or* 21 39 03.2268098280 +57 30 42.058603836           ~ 11 0
105 2MASS J21391098+5651151 Y*O 21 39 10.9861234824 +56 51 15.129077184           ~ 3 0
106 [BVD2011] 79 Or* 21 39 16.9073790600 +56 55 24.252630816           ~ 5 0
107 CGCS 5405 Or* 21 39 28.4328415392 +58 09 05.735330460           ~ 7 0
108 [BVD2011] 81 Or* 21 39 29.3987676984 +57 06 30.718573452           K7.0e 5 0
109 [BVD2011] 82 Or* 21 39 30.8756820672 +57 22 27.228207252           K7.0e 9 0
110 2MASS J21393561+5718220 TT* 21 39 35.6259261864 +57 18 21.888746856 20.814   18.723 17.138 15.722 M0 18 0
111 [BVD2011] 84 Or* 21 39 38.8360801152 +57 54 51.318398628           M4.5 4 0
112 [BVD2011] 85 Or* 21 39 42.8979040248 +56 00 36.919012644           ~ 3 0
113 2MASS J21394405+5741376 Em* 21 39 44.056 +57 41 37.66           ~ 1 0
114 [BVD2011] 86 Or* 21 39 45.8737073304 +57 30 51.738570432           K6.0e 12 0
115 [CPO2009] 131 Or* 21 39 49.1893382712 +58 14 36.736398276   23.277 21.125   17.511 ~ 4 0
116 [BVD2011] 88 Or* 21 39 50.0457031560 +56 53 50.417424456           ~ 4 0
117 [BVD2011] 89 Or* 21 39 50.2941332952 +58 08 22.654093740           ~ 7 0
118 [BVD2011] 90 Or* 21 39 51.8873735112 +57 26 58.284331728           ~ 5 0
119 [BVD2011] 91 Or* 21 39 52.1663401704 +58 14 12.943536180           ~ 6 0
120 2MASS J21395237+5756186 TT* 21 39 52.372 +57 56 18.68     16.73 15.59 14.59 G1 6 0
121 [BVD2011] 93 Or* 21 39 54.0686477664 +57 29 33.466745796           K7.5e 9 0
122 [BVD2011] 94 Or* 21 39 55.6995386832 +57 16 38.187750900           M0.5e 9 0
123 [BVD2011] 95 Em* 21 39 56.115 +57 27 07.97           ~ 3 0
124 [BVD2011] 96 Or* 21 39 57.7017458952 +57 23 43.226740500           ~ 5 0
125 [GFG2007] 20 Or* 21 39 58.4614973232 +58 12 14.779082664           ~ 7 0
126 [BVD2011] 98 Or* 21 40 04.5322778328 +57 28 36.253201332 18.045   16.165   13.893 K5.5e 17 0
127 [BVD2011] 99 Or* 21 40 04.5578988600 +58 15 11.595429504           ~ 6 0
128 [SHB2004] Trumpler 37 24-1736 TT* 21 40 11.3605173840 +57 39 51.832939716 19.886   18.762 17.138 15.497 M1 10 0
129 [SHB2004] Trumpler 37 24-1796 TT* 21 40 11.8565620656 +57 40 12.059665176 18.389   17.341 15.897 14.825 K7 19 0
130 [BVD2011] 102 Or* 21 40 20.0561874648 +57 50 44.226418164           ~ 5 0
131 [SHB2004] Trumpler 37 22-2651 TT* 21 40 21.3007399968 +57 26 57.897598884 18.825   17.878 17.10 15.375 M1.5 15 0
132 [CPO2009] 133 Or* 21 40 21.7671107136 +58 14 45.510794592   23.012 21.092   17.536 ~ 5 0
133 [BVD2011] 105 Or* 21 40 25.3762030896 +57 34 16.239318168           M2.0e 7 0
134 [OSP2002] BRC 38 2 Or* 21 40 27.3283494888 +58 14 21.256784340   21.11 19.32 17.77 16.37 M1e 13 0
135 [BVD2011] 107 Or* 21 40 35.3298690024 +57 23 09.578277348           ~ 10 0
136 [SHB2004] Trumpler 37 23-570 TT* 21 40 35.7546987000 +57 34 55.064225352 18.391   16.718 15.276 14.308 K6 12 0
137 [OSP2002] BRC 38 6 Or* 21 40 36.9154939776 +58 14 37.925007144   17.43 15.71 14.60 13.52 K2e 10 0
138 [OSP2002] BRC 38 17 Or* 21 40 38.8444602480 +58 13 02.824340556           M3e 6 0
139 [BVD2011] 111 Or* 21 40 40.7274017928 +57 32 14.798299632           ~ 5 0
140 [BVD2011] 112 Em* 21 40 41.237 +58 11 58.45           ~ 2 0
141 [CPO2009] 128 Or* 21 40 42.8202488376 +58 19 37.385790708     21.135   17.456 ~ 7 0
142 [BVD2011] 114 Em* 21 40 44.949 +57 48 14.03           ~ 3 0
143 [BVD2011] 115 Or* 21 40 45.0518027640 +58 11 15.661358988           ~ 5 0
144 2MASS J21404978+5839151 Y*O 21 40 49.8061288032 +58 39 15.155316900           ~ 3 0
145 [BVD2011] 116 Em* 21 40 51.444 +57 46 44.66           ~ 3 0
146 [GMM2009] S131 12 Or* 21 40 53.6447737920 +56 30 52.388251128           ~ 4 0
147 [SHB2004] Trumpler 37 53-1561 TT* 21 40 55.9405045992 +57 17 59.214603336     17.86 16.59 15.44 K6 14 0
148 [KW97] 59-2 Or* 21 40 59.7931174776 +57 44 03.647431212     13.7     ~ 10 0
149 [BVD2011] 120 Or* 21 41 00.8400071928 +57 23 03.015574764           ~ 4 0
150 IPHAS J214102.28+585229.3 Em* 21 41 02.28 +58 52 29.3           ~ 1 0
151 [SHB2004] Trumpler 37 23-969 TT* 21 41 14.9872888176 +57 38 14.921012076 18.36   16.39 15.28 14.51 K5.5 15 0
152 [BVD2011] 122 Or* 21 41 15.9822019488 +58 08 26.429540784           ~ 5 0
153 [BVD2011] 123 Or* 21 41 18.6751738056 +57 51 52.097692140           ~ 4 0
154 2MASS J21412864+5736432 TT* 21 41 28.6625790864 +57 36 43.315475004 19.72   18.75 17.42 16.36 K6 15 0
155 [BVD2011] 125 Or* 21 41 38.2950081816 +57 23 37.102455996           M2.5e 5 0
156 [BVD2011] 126 Or* 21 41 40.6697083752 +57 22 53.227274196           ~ 3 0
157 IPHAS J214202.26+561403.1 Em* 21 42 02.26 +56 14 03.1           ~ 1 0
158 [OH83] B163 1 Or* 21 42 02.9777486784 +56 47 40.113749760     14.5     ~ 9 0
159 [BVD2011] 128 Or* 21 42 13.5393032784 +56 57 47.311085160           ~ 4 0
160 [BVD2011] 129 Or* 21 42 16.7954101200 +57 36 22.002540192           ~ 13 0
161 [BVD2011] 130 Or* 21 42 17.6341659432 +56 55 50.189795040           ~ 4 0
162 [BVD2011] 131 Or* 21 42 26.5685233992 +57 29 52.226870028           ~ 11 0
163 [BVD2011] 132 Or* 21 42 53.5038922272 +57 55 08.589632700           ~ 4 0
164 [BVD2011] 133 Or* 21 42 53.8811739072 +57 47 28.882346532           ~ 9 0
165 2MASS J21431068+5636447 Em* 21 43 10.6798962048 +56 36 44.728337808           ~ 2 0
166 2MASS J21433029+5754330 Y*O 21 43 30.3044306520 +57 54 33.037211736           ~ 3 0
167 [BVD2011] 134 Or* 21 43 32.2528617384 +56 59 29.985637344           ~ 4 0
168 [BVD2011] 135 Or* 21 44 01.8598426416 +57 13 52.496402844           ~ 7 0
169 [BVD2011] 136 Or* 21 44 27.0542585568 +58 19 54.708186396           ~ 5 0
170 [BVD2011] 137 Or* 21 44 33.1616541504 +57 37 32.676564324           ~ 4 0
171 [BVD2011] 138 Or* 21 44 35.5854943824 +57 18 05.674569012           ~ 4 0
172 [BVD2011] 139 Or* 21 44 41.3411209848 +57 46 11.925127596           ~ 4 0
173 2MASS J21444369+5714197 Y*O 21 44 43.7093282976 +57 14 19.817255616           ~ 5 0
174 [BVD2011] 140 TT* 21 45 05.8909170960 +57 11 38.619638736           ~ 6 0
175 [BVD2011] 141 Or* 21 45 13.0577829024 +56 53 07.012149792           ~ 4 0
176 [BVD2011] 142 Or* 21 45 13.6244334192 +57 10 40.958670252           ~ 5 0
177 IPHAS J214513.93+572241.7 Em* 21 45 13.9416993576 +57 22 41.740416732           ~ 3 0
178 [BVD2011] 143 Em* 21 45 14.724 +57 28 01.69           ~ 3 0
179 2MASS J21452455+5755489 Y*O 21 45 24.5576739528 +57 55 48.861235092           ~ 4 0
180 [BVD2011] 144 Or* 21 45 27.8627893944 +57 30 39.078528444           ~ 6 0
181 IRAS 21440+5648 TT* 21 45 37.0049419944 +57 02 01.236474060           ~ 10 0
182 [BVD2011] 146 Or* 21 45 47.7375421128 +56 48 45.748723932           M5 5 0
183 [BVD2011] 147 Or* 21 45 59.4269455560 +56 25 49.396294992           ~ 3 0
184 IRAS 21444+5709 TT* 21 46 00.2720233872 +57 23 09.520929024           ~ 11 0
185 [BVD2011] 149 Or* 21 46 16.8807145728 +58 36 30.611600208           ~ 3 0
186 2MASS J21462409+5833275 Em* 21 46 24.0938035344 +58 33 27.530978580           ~ 1 0
187 [OSP2002] BRC 39 4 Or* 21 46 25.9790710968 +57 28 28.770773628           M2.5 11 0
188 [BVD2011] 151 Or* 21 46 27.1733121072 +58 31 13.129413744           ~ 3 0
189 [BVD2011] 152 Or* 21 46 59.2534013496 +58 24 48.936529116           ~ 3 0
190 [BVD2011] 153 Or* 21 47 13.5171729072 +56 49 29.750433816           ~ 4 0
191 [BVD2011] 154 Or* 21 48 08.0923310136 +57 46 26.606132580           ~ 4 0
192 [BVD2011] 155 Or* 21 48 11.7751395024 +57 59 41.550050220           ~ 5 0
193 [BVD2011] 156 Or* 21 48 20.5195917816 +57 04 31.056830184           ~ 3 0
194 IPHAS J214930.22+570323.1 Em* 21 49 30.2276670912 +57 03 23.019531840           ~ 1 0
195 [BVD2011] 157 Or* 21 49 33.6536706192 +57 45 02.132260956           ~ 3 0
196 [BVD2011] 158 Or* 21 49 42.6969760800 +57 18 20.834565372           ~ 3 0
197 Ass Cep OB 2 As* 21 51 +60.0           ~ 303 0

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