2018A&A...616A.128H


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.11CEST20:11:20

2018A&A...616A.128H - Astronomy and Astrophysics, volume 616A, 128-128 (2018/8-1)

VLBA+GBT observations of the COSMOS field and radio source counts at 1.4 GHz.

HERRERA RUIZ N., MIDDELBERG E., DELLER A., SMOLCIC V., NORRIS R.P., NOVAK M., DELVECCHIO I., BEST P.N., SCHINNERER E., MOMJIAN E., DETTMAR R.-J., BRISKEN W., KOEKEMOER A.M. and SCOVILLE N.Z.

Abstract (from CDS):

We present very long baseline interferometry (VLBI) observations of 179 radio sources in the COSMOS field with extremely high sensitivity using the Green Bank Telescope (GBT) together with the Very Long Baseline Array (VLBA) (VLBA+GBT) at 1.4GHz, to explore the faint radio population in the flux density regime of tens of µJy. Here, the identification of active galactic nuclei (AGN) is based on the VLBI detection of the source, meaning that it is independent of X-ray or infrared properties. The milli-arcsecond resolution provided by the VLBI technique implies that the detected sources must be compact and have large brightness temperatures, and therefore they are most likely AGN (when the host galaxy is located at z≥eq0.1). On the other hand, this technique only allows us to positively identify when a radio-active AGN is present, in other words, we cannot affirm that there is no AGN when the source is not detected. For this reason, the number of identified AGN using VLBI should be always treated as a lower limit. We present a catalogue containing the 35 radio sources detected with the VLBA+GBT, ten of which were not previously detected using only the VLBA. We have constructed the radio source counts at 1.4GHz using the samples of the VLBA and VLBA+GBT detected sources of the COSMOS field to determine a lower limit for the AGN contribution to the faint radio source population. We found an AGN contribution of >40-75% at flux density levels between 150µJy and 1mJy. This flux density range is characterised by the upturn of the Euclidean-normalised radio source counts, which implies a contribution of a new population. This result supports the idea that the sub-mJy radio population is composed of a significant fraction of radio-emitting AGN, rather than solely by star-forming galaxies, in agreement with previous studies.

Abstract Copyright: © ESO 2018

Journal keyword(s): catalogs - galaxies: active - radio continuum: galaxies

Simbad objects: 169

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Number of rows : 169

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3545 3
2 NAME Extended Chandra Deep Field South reg 03 32 30.0 -27 48 20           ~ 614 0
3 ICRF J092703.0+390220 Sy1 09 27 03.0139516273 +39 02 20.847968628   17.17 17.00 16.486   ~ 932 1
4 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 2069 0
5 COSMOSVLADP J100044.74+023326.5 rG 10 00 44.78 +02 33 26.6 22.708 22.40 21.84 21.310 20.553 ~ 12 0
6 COSMOSVLA J100048.07+023441.6 Rad 10 00 48.073 +02 34 41.63           ~ 3 0
7 [SCS2004] J100048.883+023127.25 Rad 10 00 48.896 +02 31 27.56           ~ 5 0
8 ACS-GC 20147055 EmG 10 00 50.45 +02 33 55.9 23.83 23.59 23.09 22.88 22.35 ~ 10 0
9 COSMOSVLA J100050.50+023254.4 Rad 10 00 50.500 +02 32 54.48           ~ 3 0
10 COSMOSVLADP J100050.84+023817.6 Rad 10 00 50.8480 +02 38 17.620           ~ 2 0
11 COSMOSVLA J100051.48+022919.0 Rad 10 00 51.489 +02 29 19.05           ~ 3 0
12 UVISTADR1 J100051.58+023334.2 G 10 00 51.584 +02 33 34.36 25.44 24.71 23.96 23.74 23.34 ~ 9 0
13 COSMOSVLA J100051.97+023529.2 Rad 10 00 51.973 +02 35 29.28           ~ 3 0
14 COSMOSVLA J100054.47+023905.1 Rad 10 00 54.470 +02 39 05.14           ~ 3 0
15 COSMOSVLA J100054.48+023409.2 Rad 10 00 54.485 +02 34 09.26           ~ 3 0
16 ACS-GC 20145920 AGN 10 00 54.503 +02 32 15.44   24.635 24.473   23.780 ~ 17 0
17 COSMOSVLA J100054.83+023126.2 Rad 10 00 54.836 +02 31 26.29           ~ 4 0
18 COSMOSVLA J100054.88+023313.9 Rad 10 00 54.888 +02 33 13.99           ~ 3 0
19 COSMOSVLA J100054.99+022849.8 Rad 10 00 54.998 +02 28 49.80           ~ 3 0
20 COSMOSVLA J100055.36+022942.3 Rad 10 00 55.364 +02 29 42.30           ~ 3 0
21 [VV2006] J100055.4+023441 QSO 10 00 55.3884 +02 34 41.314 20.85 20.25 20.37   20.05 ~ 52 0
22 COSMOSVLA J100055.73+023528.8 Rad 10 00 55.734 +02 35 28.80           ~ 3 0
23 COSMOSVLA J100055.78+023705.8 Rad 10 00 55.781 +02 37 05.88           ~ 3 0
24 COSMOSVLADP J100056.12+023939.0 Rad 10 00 56.1210 +02 39 39.010           ~ 2 0
25 COSMOSVLA J100056.44+023812.3 Rad 10 00 56.440 +02 38 12.35           ~ 3 0
26 ACS-GC 20173833 AGN 10 00 56.77 +02 38 41.9     25.048   23.753 ~ 10 0
27 COSMOSVLA J100056.94+024120.9 Rad 10 00 56.946 +02 41 20.98           ~ 3 0
28 [SCS2004] J100057.062+022942.53 Rad 10 00 57.052 +02 29 43.01           ~ 5 0
29 ACS-GC 20143908 G 10 00 57.107 +02 34 51.75         23.815 ~ 7 0
30 COSMOSVLA J100057.44+023620.5 Rad 10 00 57.444 +02 36 20.50           ~ 3 0
31 COSMOSVLA J100058.01+023427.2 Rad 10 00 58.015 +02 34 27.23           ~ 3 0
32 COSMOSVLA J100059.06+023508.9 Rad 10 00 59.063 +02 35 08.96           ~ 4 0
33 COSMOSVLA J100059.58+023736.1 Rad 10 00 59.586 +02 37 36.19           ~ 3 0
34 COSMOSVLA J100059.81+023304.0 Rad 10 00 59.810 +02 33 04.02           ~ 3 0
35 COSMOSVLA J100100.60+023305.3 Rad 10 01 00.604 +02 33 05.38           ~ 3 0
36 COSMOSVLA J100101.61+023518.7 Rad 10 01 01.611 +02 35 18.79           ~ 3 0
37 COSMOSVLA J100101.80+024111.7 Rad 10 01 01.809 +02 41 11.72           ~ 4 0
38 zCOSMOS 838075 G 10 01 02.19 +02 31 41.2     21.862     ~ 7 0
39 COSMOSVLA J100102.25+023034.8 Rad 10 01 02.252 +02 30 34.80           ~ 3 0
40 ACS-GC 20146223 AG? 10 01 02.556 +02 31 41.25         23.932 ~ 5 0
41 COSMOSVLA J100103.34+023229.7 Rad 10 01 03.347 +02 32 29.70           ~ 3 0
42 COSMOSVLA J100103.61+024005.0 Rad 10 01 03.611 +02 40 05.05           ~ 3 0
43 COSMOSVLADP J100103.74+023053.2 Rad 10 01 03.7410 +02 30 53.240           ~ 2 0
44 COSMOSVLA J100103.75+023806.5 Rad 10 01 03.757 +02 38 06.57           ~ 3 0
45 COSMOSVLA J100103.76+024212.4 Rad 10 01 03.768 +02 42 12.45           ~ 3 0
46 COSMOS2015 825433 EmG 10 01 04.2525182611 +02 33 07.372707657 21.907 20.987 19.476 19.075 18.540 ~ 16 0
47 COSMOSVLADP J100104.28+022806.8 Rad 10 01 04.2890 +02 28 06.860           ~ 2 0
48 COSMOSVLA J100104.59+023638.0 Rad 10 01 04.596 +02 36 38.04           ~ 3 0
49 COSMOSVLA J100104.84+022859.7 Rad 10 01 04.841 +02 28 59.79           ~ 3 0
50 COSMOSVLA J100104.92+023828.0 Rad 10 01 04.929 +02 38 28.01           ~ 3 0
51 COSMOS 2303599 G 10 01 05.127 +02 30 04.08           ~ 6 0
52 COSMOSVLA J100105.55+023309.8 Rad 10 01 05.552 +02 33 09.87           ~ 3 0
53 COSMOSVLA J100105.64+023238.3 Rad 10 01 05.647 +02 32 38.36           ~ 3 0
54 COSMOSVLA J100106.06+023121.3 Rad 10 01 06.064 +02 31 21.36           ~ 3 0
55 COSMOSVLA J100106.17+022707.5 Rad 10 01 06.171 +02 27 07.53           ~ 3 0
56 COSMOSVLA J100107.12+023748.6 Rad 10 01 07.123 +02 37 48.68           ~ 3 0
57 COSMOSVLADP J100107.72+022736.9 Rad 10 01 07.7250 +02 27 36.900           ~ 2 0
58 COSMOSVLADP J100108.43+023244.5 Rad 10 01 08.4340 +02 32 44.510           ~ 2 0
59 COSMOSVLA J100108.69+023022.4 Rad 10 01 08.698 +02 30 22.49           ~ 3 0
60 ACS-GC 20146051 G 10 01 09.01 +02 28 16.1 25.17 24.64 23.62 22.97 21.790 ~ 8 0
61 ACS-GC 20145671 AGN 10 01 10.25 +02 31 27.2   25.360 24.887   23.443 ~ 11 0
62 COSMOSVLA J100110.42+023657.7 Rad 10 01 10.426 +02 36 57.74           ~ 3 0
63 COSMOSVLA J100110.49+023226.3 Rad 10 01 10.496 +02 32 26.37           ~ 3 0
64 COSMOSVLA J100111.29+022917.6 Rad 10 01 11.298 +02 29 17.64           ~ 3 0
65 COSMOSVLADP J100111.56+022840.8 Rad 10 01 11.5630 +02 28 40.800           ~ 2 0
66 COSMOSVLA J100111.61+023413.4 Rad 10 01 11.616 +02 34 13.44           ~ 3 0
67 UVISTADR1 J100111.99+023442.2 G 10 01 11.990 +02 34 42.44 22.967 22.46 21.590 20.982 20.340 ~ 11 0
68 COSMOS 2660152 G 10 01 12.07 +02 41 06.8 24.66 24.55 24.09 23.83 23.14 ~ 9 0
69 COSMOSVLADP J100113.52+022636.6 Rad 10 01 13.5220 +02 26 36.650           ~ 2 0
70 COSMOSVLA J100113.83+022645.1 Rad 10 01 13.832 +02 26 45.13           ~ 3 0
71 COSMOSVLA J100114.09+022625.6 Rad 10 01 14.099 +02 26 25.64           ~ 3 0
72 COSMOSVLA J100114.70+023518.3 Rad 10 01 14.707 +02 35 18.35           ~ 4 0
73 COSMOSVLA J100115.22+024258.3 Rad 10 01 15.223 +02 42 58.34           ~ 4 0
74 SCOSMOS70 J100115.4+022858 G 10 01 15.489 +02 28 58.21 20.141 19.444 18.602   17.909 ~ 13 0
75 ACS-GC 20114012 AGN 10 01 16.13 +02 27 05.9   24.971 24.527   23.599 ~ 13 0
76 COSMOSVLA J100116.18+023241.8 Rad 10 01 16.183 +02 32 41.82           ~ 3 0
77 COSMOSVLA J100116.59+022727.5 Rad 10 01 16.597 +02 27 27.50           ~ 3 0
78 COSMOSVLA J100116.79+022830.7 Rad 10 01 16.791 +02 28 30.70           ~ 3 0
79 COSMOSVLA J100117.23+023704.7 Rad 10 01 17.238 +02 37 04.76           ~ 3 0
80 COSMOSVLA J100117.27+023308.7 Rad 10 01 17.271 +02 33 08.71           ~ 3 0
81 [BMM2014] 1435469 G 10 01 17.351 +02 30 15.86     19.847   18.82 ~ 11 0
82 COSMOSVLA J100117.58+022657.2 Rad 10 01 17.582 +02 26 57.23           ~ 3 0
83 COSMOSVLA J100117.69+024123.1 Rad 10 01 17.699 +02 41 23.15           ~ 3 0
84 COSMOSVLA J100117.85+022654.1 Rad 10 01 17.853 +02 26 54.12           ~ 3 0
85 [BMM2014] 1437575 G 10 01 17.966 +02 29 02.66 22.828 21.618 20.132 19.419 18.764 ~ 20 0
86 COSMOSVLA J100118.03+023610.3 Rad 10 01 18.036 +02 36 10.30           ~ 4 0
87 2XMM J100118.5+022739 QSO 10 01 18.582 +02 27 39.13   20.959 20.596   20.038 ~ 30 0
88 COSMOSVLA J100119.50+024307.9 Rad 10 01 19.501 +02 43 07.90           ~ 3 0
89 ACS-GC 20172904 G 10 01 19.91 +02 38 56.3 22.828 21.955 20.558 20.152 19.533 ~ 11 0
90 COSMOS2015 842703 QSO 10 01 20.050 +02 34 43.82   25.113 24.241     ~ 21 0
91 COSMOSVLA J100120.18+023403.1 Rad 10 01 20.186 +02 34 03.18           ~ 3 0
92 COSMOSVLA J100120.40+022744.0 Rad 10 01 20.402 +02 27 44.01           ~ 3 0
93 [CMC2016] lid 179 Rad 10 01 20.438 +02 38 34.20           ~ 5 0
94 COSMOSVLADP J100120.85+022623.3 Rad 10 01 20.8590 +02 26 23.360           ~ 2 0
95 COSMOSVLA J100120.89+024001.6 Rad 10 01 20.892 +02 40 01.64           ~ 3 0
96 COSMOSVLA J100121.29+023535.8 Rad 10 01 21.295 +02 35 35.89           ~ 4 0
97 COSMOSVLA J100121.33+022648.8 Rad 10 01 21.339 +02 26 48.84           ~ 3 0
98 COSMOSVLA J100121.83+023129.5 Rad 10 01 21.830 +02 31 29.55           ~ 3 0
99 COSMOSVLA J100121.92+022815.6 Rad 10 01 21.921 +02 28 15.62           ~ 3 0
100 COSMOSVLA J100122.02+023724.3 Rad 10 01 22.024 +02 37 24.36           ~ 4 0
101 COSMOSVLA J100122.07+023405.6 Rad 10 01 22.075 +02 34 05.61           ~ 3 0
102 COSMOSVLA J100123.17+023931.1 Rad 10 01 23.177 +02 39 31.10           ~ 3 0
103 COSMOSVLA J100123.52+022618.1 Rad 10 01 23.529 +02 26 18.16           ~ 4 0
104 COSMOSVLA J100123.76+023934.2 Rad 10 01 23.760 +02 39 34.21           ~ 3 0
105 COSMOSVLA J100125.32+023527.4 Rad 10 01 25.323 +02 35 27.42           ~ 3 0
106 COSMOSVLA J100125.36+023851.7 Rad 10 01 25.364 +02 38 51.74           ~ 4 0
107 COSMOSVLA J100125.41+023145.1 Rad 10 01 25.419 +02 31 45.18           ~ 3 0
108 COSMOSVLA J100125.97+023819.0 Rad 10 01 25.979 +02 38 19.08           ~ 3 0
109 COSMOSVLADP J100126.06+024149.5 Rad 10 01 26.0650 +02 41 49.590           ~ 2 0
110 COSMOSVLA J100126.29+023934.1 Rad 10 01 26.294 +02 39 34.11           ~ 3 0
111 COSMOSVLA J100127.97+024029.3 AG? 10 01 27.979 +02 40 29.39         22.580 ~ 7 0
112 COSMOSVLA J100128.66+023311.9 Rad 10 01 28.667 +02 33 11.97           ~ 3 0
113 COSMOSVLA J100129.48+023353.7 Rad 10 01 29.487 +02 33 53.70           ~ 3 0
114 COSMOSVLA J100129.58+022716.3 Rad 10 01 29.586 +02 27 16.32           ~ 3 0
115 2XMM J100129.7+023238 AGN 10 01 29.832 +02 32 39.01   22.462 21.891   20.877 ~ 27 0
116 COSMOSVLA J100130.20+022856.0 Rad 10 01 30.205 +02 28 56.04           ~ 3 0
117 COSMOSVLA J100130.44+024256.5 Rad 10 01 30.447 +02 42 56.53           ~ 3 0
118 2XMM J100131.1+022924 AGN 10 01 31.151 +02 29 24.69 22.564 21.578 20.161 19.555 18.909 ~ 29 0
119 [BMM2014] 1198880 G 10 01 31.362 +02 26 39.52   21.873 20.698   18.62 ~ 12 0
120 COSMOSVLA J100131.96+022807.8 Rad 10 01 31.967 +02 28 07.86           ~ 3 0
121 COSMOSVLADP J100132.14+023517.8 AGN 10 01 32.161 +02 35 17.86 25.80 25.43 24.41 23.63 22.49 ~ 9 0
122 COSMOSVLA J100132.66+023232.3 Rad 10 01 32.662 +02 32 32.32           ~ 3 0
123 COSMOSVLA J100133.58+022749.6 Rad 10 01 33.585 +02 27 49.68           ~ 4 0
124 COSMOSVLA J100135.24+023109.1 Rad 10 01 35.248 +02 31 09.10           ~ 3 0
125 COSMOSVLA J100135.26+023102.2 Rad 10 01 35.262 +02 31 02.25           ~ 3 0
126 COSMOSVLA J100136.35+022751.2 Rad 10 01 36.354 +02 27 51.23           ~ 3 0
127 2XMM J100136.3+022643 BiC 10 01 36.465 +02 26 42.15   19.250 18.239   16.368 ~ 19 0
128 COSMOSVLA J100136.65+023639.0 Rad 10 01 36.654 +02 36 39.06           ~ 3 0
129 COSMOSVLA J100136.94+023834.3 Rad 10 01 36.940 +02 38 34.35           ~ 4 0
130 COSMOSVLADP J100137.79+023054.9 Rad 10 01 37.7940 +02 30 54.980           ~ 2 0
131 COSMOSVLA J100137.86+023710.4 Rad 10 01 37.863 +02 37 10.43           ~ 4 0
132 COSMOSVLA J100138.55+023736.8 Rad 10 01 38.558 +02 37 36.85           ~ 3 0
133 COSMOSVLA J100139.36+023432.0 Rad 10 01 39.364 +02 34 32.08           ~ 4 0
134 COSMOSVLA J100139.47+023351.7 Rad 10 01 39.478 +02 33 51.70           ~ 3 0
135 COSMOSVLA J100139.85+023329.2 Rad 10 01 39.855 +02 33 29.27           ~ 3 0
136 COSMOSVLA J100140.23+022735.9 Rad 10 01 40.239 +02 27 35.96           ~ 3 0
137 COSMOSVLA J100140.30+023331.0 Rad 10 01 40.309 +02 33 31.03           ~ 3 0
138 COSMOSVLA J100141.17+023250.8 Rad 10 01 41.173 +02 32 50.85           ~ 3 0
139 COSMOSVLA J100141.42+023523.9 Rad 10 01 41.422 +02 35 23.93           ~ 3 0
140 ACS-GC 20142432 G 10 01 41.44 +02 31 57.2 22.186 21.231 19.882 19.561 18.996 ~ 10 0
141 UVISTADR1 J100141.50+023459.6 EmG 10 01 41.506 +02 34 59.50 21.678 21.609 21.311 21.147 20.782 ~ 11 0
142 COSMOSVLA J100142.04+023050.0 Rad 10 01 42.041 +02 30 50.00           ~ 3 0
143 COSMOSVLA J100142.19+023503.1 Rad 10 01 42.195 +02 35 03.12           ~ 3 0
144 COSMOS2015 894779 G 10 01 42.502 +02 39 23.27 22.245 22.065 21.524 21.128 20.758 ~ 13 0
145 ACS-GC 20140087 AGN 10 01 42.72 +02 33 31.1 24.04 23.721 23.443   21.639 ~ 19 0
146 COSMOSVLA J100143.86+023054.0 Rad 10 01 43.868 +02 30 54.04           ~ 3 0
147 COSMOSVLA J100144.12+023724.4 Rad 10 01 44.121 +02 37 24.46           ~ 3 0
148 COSMOSVLA J100144.56+023006.2 Rad 10 01 44.564 +02 30 06.28           ~ 3 0
149 COSMOSVLA J100144.94+023835.4 Rad 10 01 44.945 +02 38 35.46           ~ 3 0
150 COSMOSVLA J100145.15+023253.3 Rad 10 01 45.157 +02 32 53.33           ~ 3 0
151 ACS-GC 20140040 AGN 10 01 45.46 +02 32 36.6 23.71 23.74 23.24 23.03 22.29 ~ 9 0
152 COSMOSVLA J100145.56+023706.9 Rad 10 01 45.560 +02 37 06.99           ~ 3 0
153 COSMOSVLA J100145.94+023325.2 Rad 10 01 45.948 +02 33 25.22           ~ 3 0
154 COSMOSVLA J100145.96+022853.9 Rad 10 01 45.967 +02 28 53.97           ~ 4 0
155 COSMOSVLA J100145.97+023947.9 Rad 10 01 45.970 +02 39 47.95           ~ 4 0
156 COSMOSVLA J100146.23+022906.3 Rad 10 01 46.238 +02 29 06.37           ~ 3 0
157 UVISTADR1 J100146.71+023251.6 G 10 01 46.71 +02 32 51.6 22.988 21.751 20.252 19.591 18.939 ~ 9 0
158 COSMOSVLA J100146.79+023105.8 Rad 10 01 46.791 +02 31 05.81           ~ 3 0
159 COSMOSVLADP J100147.11+023916.6 Rad 10 01 47.1120 +02 39 16.650           ~ 2 0
160 COSMOSVLA J100147.19+023057.9 Rad 10 01 47.194 +02 30 57.95           ~ 3 0
161 COSMOSVLA J100147.80+022913.7 Rad 10 01 47.809 +02 29 13.73           ~ 3 0
162 NVSS J100149+023339 rG 10 01 49.62 +02 33 34.9 26.42 25.45 24.76 24.32 23.28 ~ 9 0
163 COSMOSVLA J100150.65+023854.7 Rad 10 01 50.658 +02 38 54.77           ~ 3 0
164 COSMOSVLA J100150.98+023541.1 Rad 10 01 50.980 +02 35 41.10           ~ 3 0
165 COSMOSVLA J100151.13+023053.0 Rad 10 01 51.138 +02 30 53.00           ~ 3 0
166 COSMOSVLA J100154.43+023239.9 Rad 10 01 54.434 +02 32 39.98           ~ 3 0
167 COSMOSVLA J100154.48+023255.7 Rad 10 01 54.481 +02 32 55.73           ~ 3 0
168 ICRF J101115.6+010642 BLL 10 11 15.6399664782 +01 06 42.516711282   19.69 19.32 18.8   ~ 33 1
169 NAME Lockman Hole reg 10 45 00.0 +58 00 00           ~ 748 0

    Equat.    Gal    SGal    Ecl

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2020.07.11-20:11:20

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