2016MNRAS.462.2122W

Query : 2016MNRAS.462.2122W

2016MNRAS.462.2122W - Mon. Not. R. Astron. Soc., 462, 2122-2137 (2016/October-3)

The faint source population at 15.7 GHz - III. A high-frequency study of HERGs and LERGs.

WHITTAM I.H., RILEY J.M., GREEN D.A. and JARVIS M.J.

Abstract (from CDS):

A complete sample of 96 faint (S > 0.5 mJy) radio galaxies is selected from the Tenth Cambridge (10C) survey at 15.7 GHz. Optical spectra are used to classify 17 of the sources as high-excitation or low-excitation radio galaxies (HERGs and LERGs, respectively), for the remaining sources three other methods are used; these are optical compactness, X-ray observations and mid-infrared colour-colour diagrams. 32 sources are HERGs and 35 are LERGs while the remaining 29 sources could not be classified. We find that the 10C HERGs tend to have higher 15.7-GHz flux densities, flatter spectra, smaller linear sizes and be found at higher redshifts than the LERGs. This suggests that the 10C HERGs are more core dominated than the LERGs. Lower-frequency radio images, linear sizes and spectral indices are used to classify the sources according to their radio morphology; 18 are Fanaroff and Riley type I or II sources, a further 13 show some extended emission, and the remaining 65 sources are compact and are referred to as FR0 sources. The FR0 sources are sub-divided into compact, steep-spectrum sources (13 sources) or gigahertz-peaked spectrum sources (10 sources) with the remaining 42 in an unclassified class. FR0 sources are more dominant in the subset of sources with 15.7-GHz flux densities <1 mJy, consistent with the previous result that the fainter 10C sources have flatter radio spectra. The properties of the 10C sources are compared to the higher-flux density Australia Telescope 20 GHz (AT20G) survey. The 10C sources are found at similar redshifts to the AT20G sources but have lower luminosities. The nature of the high-frequency selected objects changes as flux density decreases; at high flux densities the objects are primarily quasars, while at low flux densities radio galaxies dominate.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

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

Simbad objects: 98

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Number of rows : 98
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 Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 2282 1
2 NVSS J104320+585625 rG 10 43 20.57784 +58 56 21.0732           ~ 8 1
3 10C J104328+590312 rG 10 43 28.0 +59 03 12           ~ 3 0
4 FIRST J104344.7+591502 rG 10 43 44.716 +59 15 02.82           ~ 4 1
5 10C J104428+591540 rG 10 44 28.41 +59 15 41.5           ~ 6 0
6 10C J104441+591949 rG 10 44 41.22 +59 19 46.3           ~ 4 0
7 NVSS J104449+591923 rG 10 44 50.50 +59 19 26.6           ~ 8 1
8 NAME Lockman Hole reg 10 45 00.0 +58 00 00           ~ 910 0
9 SWIRE J104528.29+591326.7 QSO 10 45 28.33 +59 13 26.9       23.68   ~ 16 0
10 NVSS J104540+585725 rG 10 45 39.828 +58 57 30.43           ~ 7 1
11 10C J104551+590838 rG 10 45 50.83 +59 08 41.5           ~ 4 0
12 10C J104624+590447 rG 10 46 24.0 +59 04 47           ~ 4 0
13 NVSS J104630+582748 rG 10 46 30.2583364752 +58 27 45.021921336           ~ 14 1
14 CLANS 461 rG 10 46 33.18 +58 58 15.9           ~ 7 0
15 10C J104648+590956 rG 10 46 48.0 +59 09 56           ~ 3 0
16 NVSS J104700+591902 rG 10 47 00.849 +59 19 02.07           ~ 5 1
17 SDSS J104711.12+582821.1 QSO 10 47 11.1484239480 +58 28 20.632749312           ~ 7 1
18 10C J104718+585119 rG 10 47 18.0 +58 51 19           ~ 4 0
19 [VV2006] J104719.2+582117 QSO 10 47 19.2004403784 +58 21 17.517848760   19.00 18.66     ~ 35 1
20 10C J104733+591244 rG 10 47 33.0 +59 12 44           ~ 3 0
21 10C J104737+592028 rG 10 47 37.0 +59 20 28           ~ 3 0
22 10C J104741+584811 rG 10 47 41.0 +58 48 11           ~ 3 0
23 NVSS J104741+585316 rG 10 47 41.6 +58 53 20           ~ 5 1
24 10C J104751+574259 rG 10 47 51.0 +57 42 59           ~ 4 0
25 NVSS J104802+574123 rG 10 48 02.337 +57 41 25.76           ~ 5 1
26 NVSS J104822+582435 rG 10 48 22.470 +58 24 34.73           ~ 5 1
27 NVSS J104824+583029 rG 10 48 24.044 +58 30 27.75           ~ 6 1
28 10C J104826+584838 rG 10 48 26.0 +58 48 38           ~ 3 0
29 SDSS J104836.99+591846.3 QSO 10 48 36.9834407952 +59 18 46.391720184           ~ 8 0
30 NVSS J104842+582308 rG 10 48 44.118 +58 23 06.82           ~ 6 1
31 NVSS J104850+571414 rG 10 48 49.9 +57 14 15           ~ 8 1
32 NVSS J104856+575528 rG 10 48 56.0 +57 55 28           ~ 5 1
33 NVSS J104858+584103 rG 10 48 58.042 +58 41 02.50           ~ 6 1
34 NVSS J104906+571152 rG 10 49 05.3 +57 11 52           ~ 5 1
35 SDSS J104919.00+582800.8 QSO 10 49 19.0010113776 +58 28 00.777736776           ~ 21 1
36 10C J104927+583830 rG 10 49 27.0 +58 38 30           ~ 3 0
37 NVSS J104934+570611 rG 10 49 34.4 +57 06 12           ~ 5 1
38 6C 104629+585130 QSO 10 49 40.27146 +58 35 30.6004           ~ 15 1
39 10C J104943+571739 rG 10 49 43.810 +57 17 37.18           ~ 7 0
40 SDSS J104954.19+570456.0 QSO 10 49 54.2061662616 +57 04 56.058581676           ~ 8 1
41 10C J105000+585227 rG 10 50 00.0 +58 52 27           ~ 3 0
42 10C J105007+574251 rG 10 50 07.0 +57 42 51           ~ 4 0
43 10C J105007+572020 rG 10 50 08.1 +57 20 18       25.20   ~ 8 1
44 10C J105009+570724 rG 10 50 09.0 +57 07 24           ~ 3 0
45 NVSS J105020+574043 rG 10 50 20.8 +57 40 44           ~ 5 1
46 10C J105028+574522 rG 10 50 28.0 +57 45 22           ~ 3 0
47 [DZP97] 18 rG 10 50 34.0 +57 29 22           ~ 7 0
48 NVSS J105038+585118 rG 10 50 38.826 +58 51 21.01           ~ 5 1
49 10C J105039+574200 rG 10 50 39.0 +57 42 00           ~ 4 0
50 [VV98] J105039.6+572337 QSO 10 50 39.5438741904 +57 23 36.609192456   19.85 19.55 19.14   ~ 47 1
51 10C J105040+573308 rG 10 50 40.0 +57 33 08           ~ 3 0
52 NVSS J105043+575231 rG 10 50 43.206 +57 52 31.18           ~ 6 1
53 NVSS J105051+580157 rG 10 50 50.651 +58 01 59.18           ~ 5 1
54 NVSS J105053+583234 rG 10 50 53.841 +58 32 32.86           ~ 7 1
55 10C J105054+580943 rG 10 50 54.0 +58 09 43           ~ 4 0
56 ISO-LHDS J105058+573354 rG 10 50 58.0 +57 33 56           ~ 5 0
57 10C J105104+574456 rG 10 51 04.0 +57 44 56           ~ 3 0
58 SDSS J105104.54+575413.3 QSO 10 51 04.5668315328 +57 54 13.013589780           ~ 13 1
59 NVSS J105106+575750 rG 10 51 06.850 +57 57 49.28           ~ 5 1
60 FIRST J105114.9+573552 rG 10 51 15.0 +57 35 52           ~ 10 1
61 NVSS J105121+582648 rG 10 51 21.46 +58 26 48.1           ~ 6 1
62 10C J105122+584409 rG 10 51 22.0 +58 44 09           ~ 4 0
63 NVSS J105122+570854 rG 10 51 22.1 +57 08 55       24.83   ~ 10 1
64 NVSS J105121+584129 rG 10 51 22.2 +58 41 36           ~ 5 1
65 NVSS J105127+570859 rG 10 51 28.0 +57 09 02       20.19   ~ 8 1
66 NVSS J105133+571104 rG 10 51 32.3486164776 +57 11 15.508817484       18.94   ~ 11 1
67 10C J105136+572944 rG 10 51 36.0 +57 29 44           ~ 3 0
68 [CIF2003] J105138.08+574956.5 rG 10 51 38.0 +57 49 57           ~ 6 0
69 NVSS J105139+580754 rG 10 51 39.53 +58 07 54.1           ~ 5 1
70 XMMU J105142.1+573449 rG 10 51 42.0 +57 34 47       21.69   ~ 10 0
71 XMMU J105142.0+573555 rG 10 51 42.07 +57 35 55.2       24.19   ~ 8 0
72 NVSS J105144+573313 rG 10 51 44.155 +57 33 14.19           ~ 7 1
73 10C J105148+573245 rG 10 51 48.0 +57 32 45           ~ 3 0
74 NVSS J105206+574108 rG 10 52 06.5 +57 41 10       24.24   ~ 11 2
75 10C J105215+581627 rG 10 52 15.0 +58 16 27           ~ 3 0
76 10C J105220+585051 rG 10 52 20.0 +58 50 51           ~ 3 0
77 10C J105225+575507 rG 10 52 25.0 +57 55 07           ~ 4 0
78 NVSS J105225+573324 rG 10 52 25.6 +57 33 22     21.3     ~ 10 1
79 RDS 116 rG 10 52 37.0 +57 30 58     21.8     ~ 11 0
80 10C J105240+572322 rG 10 52 40.0 +57 23 22           ~ 3 0
81 10C J105243+574817 rG 10 52 43.0 +57 48 17           ~ 3 0
82 NVSS J105327+574548 rG 10 53 27.7 +57 45 43           ~ 8 1
83 FIRST J105340.8+571952 rG 10 53 40.8986 +57 19 53.282       23.09   ~ 9 1
84 NVSS J105342+574438 rG 10 53 42.2 +57 44 36       21.53   ~ 8 1
85 NVSS J105400+573322 rG 10 54 00.486 +57 33 21.17       26.04   ~ 12 1
86 FIRST J105424.7+573702 rG 10 54 24.760 +57 37 02.07           ~ 4 1
87 NVSS J105436+565921 rG 10 54 36.59 +56 59 21.0           ~ 7 1
88 10C J105441+571640 rG 10 54 41.0 +57 16 40           ~ 4 0
89 10C J105510+574503 rG 10 55 10.0 +57 45 03           ~ 4 0
90 NVSS J105516+573259 rG 10 55 16.4 +57 33 01           ~ 7 1
91 FIRST J105520.9+572241 rG 10 55 21.0 +57 22 39           ~ 5 1
92 NVSS J105527+571611 rG 10 55 27.6 +57 16 07           ~ 5 1
93 FIRST J105535.3+574635 rG 10 55 35.352 +57 46 35.26           ~ 6 1
94 10C J105550+570407 rG 10 55 50.0 +57 04 07           ~ 3 0
95 NVSS J105604+570933 rG 10 56 04.760 +57 09 33.32           ~ 6 1
96 10C J105627+574221 rG 10 56 27.0 +57 42 21           ~ 3 0
97 10C J105653+580342 rG 10 56 53.0 +58 03 42           ~ 3 0
98 NVSS J105715+572313 rG 10 57 15.913 +57 23 13.90           ~ 6 1

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