2021ApJ...906...23F

Query : 2021ApJ...906...23F

2021ApJ...906...23F - Astrophys. J., 906, 23-23 (2021/January-1)

A VLBA survey of radio stars in the Orion Nebula Cluster. I. The nonthermal radio population.

FORBRICH J., DZIB S.A., REID M.J. and MENTEN K.M.

Abstract (from CDS):

We present first results of a four-epoch VLBA survey for nonthermal emission toward all 556 compact radio sources previously identified in a deep VLA survey of the Orion Nebula Cluster (ONC). We identify VLBA counterparts toward an unprecedented 123 sources. Of these, 41 do not have X-ray counterparts, of which 34 also do not display near-infrared counterparts. Since these cannot be explained by extragalactic background sources, this suggests a component of the ONC population of young stellar objects that are too deeply embedded for even X-rays to be detectable. We find pervasive variability and detect even most of the highest-S/N sources in only one out of four epochs. Neither a negative spectral index nor extreme variability in the VLA data is a good predictor of a VLBA detection.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Non-thermal radiation sources - Star formation - Radio astrometry

VizieR on-line data: <Available at CDS (J/ApJ/906/23): table2.dat>

Simbad objects: 130

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Number of rows : 130
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 QSO J0530+13 Bla 05 30 56.41674741 +13 31 55.1494688     20.00 19.35   ~ 1004 1
2 V* KM Ori Or* 05 34 55.9724775000 -05 23 13.041837816 14.142 12.883 11.918   10.064 K5Ve 108 0
3 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2514 0
4 JW 286 Or* 05 35 06.2822748576 -05 22 02.660967804   14.2 18.810   14.347 K5 58 0
5 [FRM2016] 11 Rad 05 35 06.42810 -05 24 21.2106           ~ 3 0
6 JW 300 Or* 05 35 07.2740312760 -05 22 26.548269852     17.876   14.043 M3: 53 0
7 2MASS J05350968-0523558 Y*O 05 35 09.6752680 -05 23 55.914015     24.50   18.207 ~ 28 0
8 V* V1326 Ori Or* 05 35 09.7681644000 -05 23 26.898475704 16.267 14.776 13.806   11.678 K8 70 0
9 2MASS J05350976-0521282 Or* 05 35 09.7707952200 -05 21 28.320259140   13.8 18.916   14.344 M0,K5-K7 51 1
10 2MASS J05350989-0523384 Or* 05 35 09.8993809032 -05 23 38.498524368     20.27   15.402 M7.25 28 0
11 [FRM2016] 25 Rad 05 35 10.02718 -05 21 22.1006           ~ 3 0
12 2MASS J05351026-0521571 Or* 05 35 10.2599977872 -05 21 57.158215128   13.9     15.171 M5.5 29 0
13 V* V1487 Ori A Or* 05 35 10.4918753664 -05 22 45.681747240   15.896 14.820   12.201 M0.5 55 0
14 V* V1487 Ori Or* 05 35 10.50600 -05 22 45.5412           M0.5+M2 57 0
15 MLLA 507 Y*O 05 35 10.61664 -05 22 55.9812           ~ 26 0
16 V* LQ Ori Or* 05 35 10.7315904000 -05 23 44.694430944 15.088 13.527 12.455   10.159 K8 77 1
17 MLLA 379 Y*? 05 35 10.95116 -05 23 26.6173           ~ 10 1
18 [FRM2016] 47 Rad 05 35 11.27574 -05 22 17.2670           ~ 3 0
19 2MASS J05351155-0524481 Y*? 05 35 11.557 -05 24 48.15           ~ 18 0
20 [FRM2016] 55 Rad 05 35 11.60228 -05 20 21.9419           ~ 3 0
21 COUP 444 Y*? 05 35 11.72782 -05 25 12.7569           ~ 13 0
22 COUP 450 TT* 05 35 11.8040700 -05 21 49.266135           K5V 63 0
23 [FRM2016] 70 Rad 05 35 11.98560 -05 20 32.2496           ~ 3 0
24 [FRM2016] 72 Rad 05 35 12.0828622632 -05 22 11.904798000           ~ 3 0
25 V* V2224 Ori Or* 05 35 12.1255111440 -05 24 33.776700084     15.19 14.66 15.940 M8.25 35 0
26 [FRM2016] 86 Rad 05 35 12.6069013632 -05 21 45.311213448           ~ 3 0
27 COUP 504 Y*O 05 35 12.84705 -05 21 33.9755           ~ 12 0
28 COUP 510 X 05 35 12.98346 -05 23 54.9487           ~ 15 0
29 [FRM2016] 122 Rad 05 35 13.41612 -05 22 52.7685           ~ 3 0
30 Parenago 1820 Or* 05 35 13.5189425832 -05 22 19.552361160   13.1 16.160   13.254 M1.2 60 0
31 [FRM2016] 129 Rad 05 35 13.55569 -05 21 12.5325           ~ 3 0
32 2MASS J05351356-0523552 Y*O 05 35 13.56 -05 23 55.3           ~ 38 0
33 [FRM2016] 133 Rad 05 35 13.63367 -05 24 09.1621           ~ 4 0
34 [FRM2016] 135 Rad 05 35 13.6915083456 -05 21 48.866849316           ~ 3 0
35 [FRM2016] 137 Rad 05 35 13.71170 -05 25 08.4494           ~ 3 0
36 COUP 593 Y*O 05 35 13.9249648560 -05 23 20.155538292           ~ 27 0
37 [EC2006] MM14 Y*O 05 35 13.93039 -05 24 09.4197           ~ 15 0
38 COUP 594 * 05 35 13.97231 -05 24 09.8193           ~ 12 0
39 Parenago 1823 Or* 05 35 14.0513648544 -05 23 38.466784464     15.078   12.238 K5 53 0
40 COUP 598 X 05 35 14.07492 -05 20 12.5574           ~ 8 0
41 COUP 608 X 05 35 14.18597 -05 26 20.8200           ~ 6 0
42 ALMA J053514.3070-052236.682 Rad 05 35 14.27553 -05 22 35.9393           ~ 4 0
43 [FRM2016] 176 Rad 05 35 14.31409 -05 21 17.8338           ~ 3 0
44 COUP 625 X 05 35 14.3352900 -05 23 17.395700           ~ 17 0
45 [FRM2016] 182 Rad 05 35 14.40372 -05 21 27.1653           ~ 3 0
46 ALMA J053514.5010-052238.674 Y*O 05 35 14.5013870 -05 22 38.696699           ~ 29 0
47 [FRM2016] 188 Rad 05 35 14.53419 -05 23 10.5434           ~ 3 0
48 COUP 640 X 05 35 14.54523 -05 23 15.9753           ~ 17 0
49 COUP 648 Or* 05 35 14.6556309840 -05 22 33.743501832   15.891 14.779   12.008 K7 61 0
50 2MASS J05351465-0520424 Or* 05 35 14.6565163944 -05 20 42.284563008   14.1 21.68   14.262 ~ 33 0
51 ALMA J053514.6621-052211.277 Y*O 05 35 14.665 -05 22 11.06           ~ 25 1
52 ** SMN 2A Y*O 05 35 14.7320 -05 22 29.823           ~ 22 0
53 [FRM2016] 205 Rad 05 35 14.76172 -05 21 54.0635           ~ 3 0
54 ALMA J053514.8988-052225.416 Y*O 05 35 14.8982780 -05 22 25.410079           ~ 41 0
55 V* V1330 Ori Or* 05 35 14.9155657944 -05 22 39.203240880   15.040 13.940   11.632 K4 78 0
56 2MASS J05351494-0523392 LM* 05 35 14.9489989176 -05 23 39.225767352   15.249 14.247   12.055 ~ 39 0
57 Parenago 1842 Or* 05 35 15.2608803288 -05 22 56.866892555 15.256 14.367 13.465   11.383 G6-G8 58 0
58 [FRM2016] 227 Rad 05 35 15.34788 -05 22 18.0953           ~ 3 0
59 [FRM2016] 230 Rad 05 35 15.36855 -05 22 33.3992           ~ 3 0
60 [FRM2016] 232 Rad 05 35 15.37753 -05 22 30.1165           ~ 3 0
61 TCC 32 Or* 05 35 15.5228426424 -05 23 37.385961360         13.821 ~ 54 1
62 V* V1501 Ori Or* 05 35 15.5533377312 -05 25 14.147311764   15.163 14.077   11.527 K4-M1 75 0
63 COUP 723 X 05 35 15.60361 -05 21 26.8917           ~ 9 0
64 COUP 734 Y*? 05 35 15.760 -05 23 38.38         15.184 ~ 23 0
65 * tet01 Ori E Or* 05 35 15.7721814864 -05 23 09.889316700           G2IV 104 0
66 * tet01 Ori A Ae* 05 35 15.8254015008 -05 23 14.334699480 5.87 6.75 6.73 6.42 6.21 B0V 508 0
67 TCC 57 Y*O 05 35 16.07 -05 23 27.8           ~ 47 0
68 V* V2284 Ori Or* 05 35 16.1925176712 -05 21 32.340541500   13.2 18.08   14.509 M3e 36 0
69 COUP 801 Or* 05 35 16.3757039592 -05 24 03.344873220     14.06     K4-K7 45 0
70 ALMA J053516.4186-052212.130 Y*O 05 35 16.4190 -05 22 12.216           ~ 17 0
71 * tet01 Ori C SB* 05 35 16.4662967280 -05 23 22.921811880 4.20 5.15 5.13 4.91 4.73 O7Vp 1479 1
72 [FRM2016] 314 Rad 05 35 16.65312 -05 20 27.1120           ~ 3 0
73 TCC 74 Y*O 05 35 16.76210 -05 23 28.0209           ~ 47 0
74 V* V1279 Ori Or* 05 35 16.7666721456 -05 24 04.257205308   14.815 13.722   11.441 M0.9e 58 0
75 M 42 HII 05 35 16.8 -05 23 15           ~ 4411 0
76 COUP 841 Y*? 05 35 16.9324596816 -05 22 09.831006408         19.101 ~ 17 0
77 [FRM2016] 327 Rad 05 35 16.96329 -05 23 33.3581           ~ 3 0
78 COUP 856 Or* 05 35 17.0598222040 -05 23 39.756219790   12.9     13.224 K8e 64 1
79 MLLA 178 Y*? 05 35 17.12653 -05 24 34.3822           ~ 10 0
80 V* AE Ori Or* 05 35 17.2187787552 -05 21 31.713381828           K4-K7 58 0
81 HD 37024 Or* 05 35 17.3524325856 -05 22 35.734959444     16.29   13.91 K0.7 81 0
82 2MASS J05351740-0522039 Y*? 05 35 17.406 -05 22 03.90           ~ 19 0
83 COUP 896 Y*? 05 35 17.50534 -05 21 06.1892           ~ 12 0
84 COUP 897 Y*O 05 35 17.55393 -05 21 45.6020     19.21     ~ 19 1
85 JW 558 Y*O 05 35 17.6729925216 -05 23 40.866823068 16.251 15.348 15.343   14.390 M5.9e 83 0
86 MLLA 157 Or* 05 35 17.7349887072 -05 24 43.694500608     19.12   15.289 M6.5e 24 0
87 [FRM2016] 373 Rad 05 35 17.86356 -05 22 15.5343           ~ 3 0
88 V* MT Ori Or* 05 35 17.9482748184 -05 22 45.477710148 14.524 13.208 12.229   10.063 K2 110 0
89 2MASS J05351802-0522052 Or* 05 35 18.0273124536 -05 22 05.362247064     19.06   14.694 K0-K3 36 0
90 V* V2325 Ori Or* 05 35 18.2064680088 -05 23 35.904973236 16.366 14.920 13.923   11.431 K4 59 0
91 [FRM2016] 398 Rad 05 35 18.32178 -05 25 05.2571           ~ 3 0
92 V* V1229 Ori Or* 05 35 18.3705735744 -05 22 37.440079608 15.941 14.257 13.251   10.987 K0 92 0
93 2MASS J05351839-0520203 Or* 05 35 18.3897557112 -05 20 20.337561564   14.5     15.821 K8-M1.5,M1.5-M3,M3-M4 23 0
94 [FRM2016] 408 Rad 05 35 18.51886 -05 21 28.3480           ~ 3 0
95 V* MV Ori Or* 05 35 18.6726304944 -05 20 33.720896364 14.842 13.736 12.725   10.236 G1e 46 0
96 [FRM2016] 426 Rad 05 35 18.94932 -05 25 07.6808           ~ 3 0
97 2MASS J05351921-0522506 Or* 05 35 19.2125163120 -05 22 50.680668972     17.099   13.882 K5 49 0
98 [FRM2016] 440 Rad 05 35 19.47491 -05 22 58.8421           ~ 3 0
99 [FRM2016] 456 Rad 05 35 19.88099 -05 23 57.2292           ~ 3 0
100 V* V491 Ori Or* 05 35 20.0525646096 -05 21 05.959872648   16.647 15.421   12.533 K7 62 0
101 V* V1517 Ori Or* 05 35 20.1347093520 -05 21 33.623818920   17.191 15.830   12.816 K9 37 0
102 V* V1338 Ori TT* 05 35 20.1661841640 -05 26 39.121381752 15.869 14.434 13.479 12.76 11.443 K0 63 0
103 V* TU Ori Or* 05 35 20.2232691384 -05 20 56.947917084 15.217 13.736 12.664   10.037 G9 58 0
104 JW 644 Or* 05 35 20.2688829960 -05 25 04.075000968     17.06 13.57 15.980 ~ 45 0
105 2MASS J05352039-0522136 Or* 05 35 20.3977430736 -05 22 13.636281216   17.885 16.618   13.149 K 39 0
106 [FRM2016] 470 Rad 05 35 20.47689 -05 24 20.3192           ~ 3 0
107 2MASS J05352063-0522455 Or* 05 35 20.6380402608 -05 22 45.557958144   14.8 19.80   15.729 M1 37 0
108 V* V1230 Ori Or* 05 35 20.7204225144 -05 21 44.345341872 9.886 10.041 9.736 9.25 8.822 B1 97 0
109 V* V1399 Ori Or* 05 35 21.0488798160 -05 23 49.016892876 14.154 13.231 12.376   10.605 G8 72 0
110 2MASS J05352208-0524327 Or* 05 35 22.0908627312 -05 24 32.852975904     13.97 12.47 14.479 ~ 41 0
111 V* V1231 Ori Or* 05 35 22.3254640296 -05 24 14.259610224     14.04 14.33   M1 47 1
112 [FRM2016] 509 Rad 05 35 22.35274 -05 25 02.3194           ~ 3 0
113 [FRM2016] 512 Rad 05 35 22.64322 -05 23 05.9911           ~ 3 0
114 JW 724 Or* 05 35 22.8347572320 -05 25 47.672494788   14.2     14.554 M5.5 20 0
115 * tet02 Ori A SB* 05 35 22.9012398264 -05 24 57.832632108 5.37 6.30 6.39 6.30 6.35 O9.5IVp 576 0
116 2MASS J05352349-0520016 Y*? 05 35 23.4950223816 -05 20 01.681801620         18.859 ~ 27 0
117 V* V1342 Ori Or* 05 35 23.5979023488 -05 25 26.508495648   13.9 17.759   14.585 M3-M3.5e 35 0
118 2MASS J05352365-0523463 Or* 05 35 23.6549404200 -05 23 46.327654032   12.9 13.95   14.491 M1 34 0
119 2MASS J05352398-0525098 Or* 05 35 23.9834690616 -05 25 09.927964020 16.121 17.448 17.537   15.144 M1 37 0
120 V* V2415 Ori Or* 05 35 24.0291523416 -05 23 13.854842772         17.089 ~ 28 0
121 V* V2421 Ori Or* 05 35 24.2576283816 -05 25 18.759432468 16.188 16.193 15.210   12.724 K2.5e 52 0
122 2MASS J05352445-0524010 Y*? 05 35 24.4702801560 -05 24 01.178977608   14.0     15.225 M1-M3: 35 0
123 [FRM2016] 534 Rad 05 35 24.82751 -05 21 01.0182           ~ 3 0
124 2MASS J05352502-0524383 Y*O 05 35 25.0318835952 -05 24 38.479139316         17.342 M7 22 0
125 Brun 685 Or* 05 35 25.0873105224 -05 23 46.747961196   15.325 14.296   12.164 ~ 54 0
126 * tet02 Ori B Y*O 05 35 26.4007537560 -05 25 00.793767576 5.36 6.29 6.38 6.29 11.050 B0.7V 206 0
127 COUP 1428 X 05 35 29.60 -05 23 12.0           ~ 7 0
128 * tet02 Ori C Or* 05 35 31.4311124640 -05 25 16.371705000   7.80 8.24     B4V 136 1
129 QSO B0539-057 Bla 05 41 38.08336552 -05 41 49.4283917     20.4 20.70   ~ 279 1
130 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 3639 0

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