2008MNRAS.385..310R

Query : 2008MNRAS.385..310R

2008MNRAS.385..310R - Mon. Not. R. Astron. Soc., 385, 310-334 (2008/March-3)

A sample of mJy radio sources at 1.4 GHz in the Lynx and Hercules fields - II. Cosmic evolution of the space density of FR I radio sources.

RIGBY E.E., BEST P.N. and SNELLEN I.A.G.

Abstract (from CDS):

In this paper the cosmic evolution of the space density of Fanaroff-Riley Class I (FR I) radio sources is investigated out to z ∼ 1, in order to understand the origin of the differences between these and the more powerful FR IIs. High-resolution radio images are presented of the best high-redshift FR I candidate galaxies, drawn from two fields of the Leiden-Berkeley Deep Survey, and previously defined by Rigby, Snellen & Best in Paper 1. Together with lower resolution radio observations (both previously published in Paper 1 and, for a subset of sources, also presented here) these are used to morphologically classify the sample. Sources which are clearly resolved are classified by morphology alone, whereas barely or unresolved sources were classified using a combination of morphology and flux density loss in the higher resolution data, indicative of resolved-out extended emission. The space densities of the FR Is are then calculated as a function of redshift, and compared to both measurements of the local value and the behaviour of the more powerful FR IIs. The space density of FR I radio sources with luminosities (at 1.4 GHz) > 1025 W/Hz is enhanced by a factor of 5-9 by z ∼ 1, implying moderately strong evolution of this population; this enhancement is in good agreement with models of FR II evolution at the same luminosity. There are also indications that the evolution is luminosity dependent, with the lower powered sources evolving less strongly.

Abstract Copyright: 2008 The Authors. Journal compilation © 2008 RAS

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

Simbad objects: 91

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Number of rows : 91
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 ICRF J054236.1+495107 Sy1 05 42 36.13789710 +49 51 07.2337139   18.45 17.80 17.210   ~ 1573 1
2 FIRST J084340.7+443925 rG 08 43 40.735 +44 39 25.31           ~ 8 1
3 SDSS J084346.87+443549.5 QSO 08 43 46.873 +44 35 49.53           ~ 10 0
4 WSTB 55W119 Rad 08 43 47.98 +44 50 41.4           ~ 3 0
5 WSTB 55W120 rG 08 43 52.87 +44 24 29.1           ~ 5 0
6 WSTB 60W16 rG 08 44 03.58 +44 38 10.2           ~ 2 0
7 WSTB 55W121 QSO 08 44 04.066 +44 31 19.80           ~ 7 1
8 WMOKK 31 rG 08 44 12.10 +44 31 17.5           ~ 4 0
9 WSTB 55W123 rG 08 44 14.54 +44 35 00.2           ~ 3 0
10 SDSS J084414.95+443852.4 QSO 08 44 14.954 +44 38 52.43           ~ 11 0
11 NVSS J084415+441119 Rad 08 44 15.260 +44 11 16.53           ~ 9 1
12 WSTB 60W24 rG 08 44 17.83 +44 35 36.9           ~ 2 0
13 NVSS J084420+445803 Rad 08 44 20.539 +44 58 05.34           ~ 6 1
14 FIRST J084427.5+444307 rG 08 44 27.528 +44 43 07.38           ~ 11 1
15 WSTB 60W32 Rad 08 44 33.69 +44 46 13.0           ~ 2 0
16 NVSS J084433+445015 Rad 08 44 33.9 +44 50 18           ~ 6 1
17 WSTB 55W131 rG 08 44 35.51 +44 46 04.1           ~ 6 0
18 WMOKK 53 Rad 08 44 37.12 +44 50 34.7           ~ 4 0
19 FIRST J084437.2+442600 rG 08 44 37.252 +44 26 00.58           ~ 7 1
20 LEDA 167215 G 08 44 41.1227450112 +44 21 37.452480948           ~ 18 1
21 WSTB 60W39 rG 08 44 42.50 +44 45 32.5           ~ 2 0
22 WSTB 55W136 rG 08 44 45.09 +44 32 27.3           ~ 6 0
23 QSO B0841+449 QSO 08 44 46.8916695528 +44 44 37.976745228   21.19 20.91     ~ 19 1
24 FIRST J084454.4+444622 rG 08 44 54.481 +44 46 22.00           ~ 6 1
25 WMOKK 69B Rad 08 45 03.29 +44 28 15.1           ~ 4 0
26 WSTB 55W143b rG 08 45 04.25 +44 25 53.3           ~ 2 0
27 WSTB 55W143a rG 08 45 05.62 +44 25 42.9           ~ 2 0
28 SDSS J084506.03+444041.6 QSO 08 45 06.0347437056 +44 40 41.591908344           ~ 7 0
29 WSTB 60W55 rG 08 45 14.00 +44 53 08.7           ~ 2 0
30 FIRST J084523.7+445023 rG 08 45 23.7671 +44 50 24.105           ~ 5 0
31 NVSS J084527+445527 rG 08 45 27.0926445816 +44 55 26.323575744           ~ 16 1
32 WSTB 55W150 rG 08 45 29.47 +44 50 37.4           ~ 10 0
33 WSTB 60W67 Rad 08 45 40.47 +44 23 20.1           ~ 2 0
34 NVSS J084541+444011 rG 08 45 40.980 +44 40 13.23           ~ 9 1
35 FIRST J084546.8+442512 Rad 08 45 46.865 +44 25 12.11           ~ 6 1
36 NVSS J084551+443951 rG 08 45 50.730 +44 39 51.27           ~ 6 1
37 WSTB 60W71 rG 08 46 00.34 +44 43 22.1           ~ 2 0
38 WSTB 55W157 QSO 08 46 04.382 +44 45 52.18           ~ 5 0
39 WSTB 55W159b rG 08 46 06.66 +44 50 53.8           ~ 2 0
40 WSTB 55W159a rG 08 46 06.67 +44 51 27.5           ~ 2 0
41 WSTB 55W160 rG 08 46 08.57 +44 36 47.4           ~ 6 0
42 WSTB 55W161 rG 08 46 27.46 +44 29 57.1           ~ 9 0
43 WSTB 55W165B rG 08 46 33.37 +44 41 24.4           ~ 4 0
44 WSTB 55W165A rG 08 46 34.78 +44 41 37.6           ~ 4 0
45 NVSS J084635+443050 rG 08 46 35.980 +44 30 53.81           ~ 10 1
46 WSTB 60W84 rG 08 46 40.23 +44 33 44.7           ~ 2 0
47 NAME Lynx reg 08 47 +44.6           ~ 67 0
48 NAME Hubble Deep Field reg 12 36 49.5 +62 12 58           ~ 1967 1
49 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
50 Mrk 668 BLL 14 07 00.39441712 +28 27 14.6901341   16.13 15.35 10.29   ~ 826 3
51 WSTB 66W9a rG 17 18 32.87 +49 55 53.9           ~ 2 0
52 2MASX J17183380+4956033 rG 17 18 33.7934940216 +49 56 03.251187528           ~ 7 0
53 WSTB 53W52 rG 17 18 34.07 +49 58 50.2           ~ 10 0
54 WSTB 53W54A rG 17 18 47.30 +49 45 49.0           ~ 5 0
55 WSTB 53W54B rG 17 18 49.97 +49 46 12.2           ~ 5 0
56 WSTB 66W14 rG 17 18 53.49 +49 52 39.3           ~ 3 0
57 WSTB 53W57 rG 17 19 07.29 +49 45 44.8           ~ 7 0
58 WSTB 53W59 rG 17 19 20.26 +50 00 19.6           ~ 9 0
59 WSTB 53W61 rG 17 19 27.34 +49 43 59.7           ~ 8 0
60 WSTB 53W62 rG 17 19 32.07 +49 59 06.8           ~ 9 0
61 WSTB 53W65 rG 17 19 40.07 +49 57 40.8           ~ 11 0
62 WSTB 53W66 Rad 17 19 42.96 +50 01 03.9           ~ 7 0
63 WSTB 53W67 rG 17 19 51.27 +50 10 58.5           ~ 12 0
64 LEDA 167147 rG 17 19 52.1 +50 02 13           ~ 8 0
65 WSTB 53W69 rG 17 20 02.54 +49 44 51.0           ~ 39 0
66 WSTB 53W70 rG 17 20 06.07 +50 06 01.7           ~ 7 0
67 WSTB 66W31 rG 17 20 06.87 +49 43 57.0           ~ 3 0
68 WSTB 66W35 rG 17 20 12.41 +49 57 08.7           ~ 3 0
69 WSTB 66W36 rG 17 20 21.46 +49 46 58.3           ~ 3 0
70 7C 171926.00+494649.00 QSO 17 20 42.4224704616 +49 43 49.112414508           ~ 13 1
71 WSTB 66W42 rG 17 20 52.20 +49 42 49.2           ~ 3 0
72 WSTB 53W76 rG 17 20 55.78 +49 41 03.1           ~ 14 0
73 NAME Her Region reg 17 21 +50.0           ~ 42 0
74 WSTB 53W77 rG 17 21 01.32 +49 48 34.1           ~ 10 0
75 WSTB 66W47 rG 17 21 05.48 +49 56 55.9           ~ 3 0
76 WSTB 66W49 rG 17 21 11.21 +49 58 32.9           ~ 3 0
77 WSTB 53W78 rG 17 21 18.17 +50 03 34.9           ~ 10 0
78 WSTB 53W79 rG 17 21 22.62 +50 10 31.2           ~ 11 0
79 [VV96] J172137.6+495537 QSO 17 21 37.5479889936 +49 55 37.117941780     18.3     ~ 23 0
80 WSTB 53W82 rG 17 21 37.64 +50 08 27.4           ~ 7 0
81 WSTB 53W81 rG 17 21 37.81 +49 57 56.9           ~ 8 0
82 WSTB 66W58 Rad 17 21 48.23 +49 47 07.3           ~ 3 0
83 WSTB 53W83 rG 17 21 48.93 +50 02 39.8           ~ 12 0
84 WSTB 53W84 rG 17 21 50.43 +49 48 30.5           ~ 4 0
85 WSTB 53W85 QSO 17 21 52.47 +49 54 34.0           ~ 10 0
86 WSTB 53W86a rG 17 21 56.42 +49 53 39.8           ~ 2 0
87 WSTB 53W86b rG 17 21 57.65 +49 53 33.8           ~ 2 0
88 WSTB 53W88 Rad 17 21 58.90 +50 11 52.7           ~ 7 0
89 WSTB 53W87 Rad 17 21 59.10 +50 08 42.9           ~ 6 0
90 WSTB 53W89 rG 17 22 01.02 +50 06 51.7           ~ 8 0
91 WSTB 53W91 rG 17 22 32.73 +50 06 01.9           ~ 79 0

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