2001MNRAS.327..907J

Query : 2001MNRAS.327..907J

2001MNRAS.327..907J - Mon. Not. R. Astron. Soc., 327, 907-917 (2001/November-1)

On the redshift cut-off for steep-spectrum radio sources.

JARVIS M.J., RAWLINGS S., WILLOTT C.J., BLUNDELL K.M., EALES S. and LACY M.

Abstract (from CDS):

We use three samples (3CRR, 6CE and 6C*) selected at low radio frequency to constrain the cosmic evolution in the radio luminosity function (RLF) for the `most luminous' steep-spectrum radio sources. Though intrinsically rare, such sources give the largest possible baseline in redshift for the complete flux-density-limited samples currently available. Using parametric models to describe the RLF, incorporating distributions in radio spectral shape and linear size, as well as the usual luminosity and redshift, we find that the data are consistent with a constant comoving space density between z∼2.5 and z∼4.5. We find that this model is favoured over a model with similar evolutionary behaviour to that of optically selected quasars (i.e., a roughly Gaussian distribution in redshift) with probability ratios of ∼25:1 and ∼100:1 for spatially flat cosmologies with OmegaLambda=0 and OmegaLambda=0.7 respectively. Within the uncertainties, this evolutionary behaviour may be reconciled with the shallow decline preferred for the comoving space density of flat-spectrum sources by Dunlop & Peacock and Jarvis & Rawlings, in line with the expectations of unified schemes.

Abstract Copyright: The Royal Astronomical Society

Journal keyword(s): galaxies: active - galaxies: luminosity function, mass function - radio continuum: galaxies

Simbad objects: 72

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Number of rows : 72
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 3C 9 BLL 00 20 25.2231670656 +15 40 54.774271884   17.92 17.62     ~ 347 1
2 NVSS J002241+441909 Rad 00 22 41.52 +44 19 10.0           ~ 7 2
3 3C 13 rG 00 34 14.555 +39 24 16.67   22.5       ~ 144 1
4 NVSS J003453+413132 rG 00 34 53.08 +41 31 31.5           ~ 21 1
5 2C 44 QSO 00 36 06.4449136608 +18 37 59.099054268   20 20     ~ 121 1
6 3C 22.0 Sy1 00 50 56.21976 +51 12 03.3552   22.0       ~ 153 1
7 NVSS J012116+485740 rG 01 21 16.31 +48 57 39.9           ~ 9 1
8 3C 43 QSO 01 29 59.7696120312 +23 38 20.041393524           ~ 203 1
9 NVSS J013806+313241 rG 01 38 06.60 +31 32 41.5           ~ 9 1
10 NVSS J014343+325349 rG 01 43 43.85 +32 53 49.7         24 ~ 37 1
11 NVSS J014529+425741 rG 01 45 29.03 +42 57 42.3           ~ 9 1
12 3C 55.0 rG 01 57 10.730 +28 51 39.85   20.8       ~ 156 1
13 3C 65 rG 02 23 43.190 +40 00 52.46   23.0       ~ 185 1
14 7C 022927.30+341049.00 QSO 02 32 28.8769824336 +34 23 46.713498468   20.70 19     ~ 197 1
15 3C 68.2 rG 02 34 23.855 +31 34 17.48   24       ~ 139 1
16 ICRF J054236.1+495107 Sy1 05 42 36.13789710 +49 51 07.2337139   18.45 17.80 17.210   ~ 1573 1
17 3C 175 Sy1 07 13 02.4220971768 +11 46 16.269484656   17.06 16.60     ~ 269 3
18 3C 181.0 Sy2 07 28 10.2171164616 +14 37 36.565176324   19.35 18.92     ~ 168 2
19 3C 184 rG 07 39 24.465 +70 23 10.91   21.5       ~ 140 1
20 3C 186 QSO 07 44 17.4720658920 +37 53 17.250697320   17.5 18.14 17.2   ~ 339 1
21 3C 190 QSO 08 01 33.5525166480 +14 14 42.813906612   21.07 20.26 18.972   ~ 249 2
22 3C 191 QSO 08 04 47.9671662720 +10 15 23.746977252   18.65 18.40     ~ 295 2
23 3C 196 Sy1 08 13 36.0561170112 +48 13 02.644966020   18.36 17.79     ~ 578 2
24 3C 204 QSO 08 37 45.0013678200 +65 13 35.305376376   18.76 18.21     ~ 184 1
25 3C 205 Sy1 08 39 06.5324936736 +57 54 17.069000688   18.10 17.62     ~ 264 1
26 3C 208 QSO 08 53 08.6093021736 +13 52 54.845406984   17.76 17.42     ~ 257 1
27 3C 212 QSO 08 58 41.44702653 +14 09 44.7622845   19.96 19.06     ~ 257 1
28 NVSS J090530+340756 rG 09 05 30.101 +34 07 56.90   24.0 23.800 23.500   ~ 163 1
29 4C 39.24 rG 09 08 13.292 +39 43 28.60           ~ 69 1
30 3C 217 Rad 09 08 50.958 +37 48 18.28   22       ~ 128 1
31 NVSS J093306+384150 rG 09 33 06.9294 +38 41 48.173           ~ 32 1
32 3C 226.0 Sy1 09 44 16.51944 +09 46 16.9068   19.5       ~ 131 2
33 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
34 3C 239 rG 10 11 45.639 +46 28 20.45   22.5       ~ 158 1
35 3C 241 rG 10 21 54.533 +21 59 30.50   23.5       ~ 171 1
36 4C 36.17 Rad 10 38 51.337 +36 01 14.91           ~ 17 1
37 4C 12.37 QSO 10 42 44.6052783816 +12 03 31.263917976   18.03 17.77     ~ 448 2
38 3C 252.0 rG 11 11 31.960 +35 40 44.64   22       ~ 127 1
39 3C 254 QSO 11 14 38.7251836992 +40 37 20.329281156   17.62 17.42     ~ 331 2
40 3C 263.1 QSO 11 43 25.083 +22 06 56.08   20       ~ 148 1
41 3C 265.0 Sy1 11 45 28.95577 +31 33 47.2434   20.0       ~ 250 1
42 3C 266 rG 11 45 43.384 +49 46 07.90   22       ~ 150 1
43 3C 267 rG 11 49 56.526 +12 47 18.95   22.5       ~ 158 2
44 3C 268.1 rG 12 00 20.53 +73 00 45.7   22       ~ 149 1
45 4C 37.33 Rad 12 06 52.617 +36 51 43.91           ~ 31 1
46 ICRF J120913.6+433920 Sy1 12 09 13.6108333200 +43 39 20.916497268   18.81 18.24     ~ 248 1
47 7C 1218+3359 QSO 12 20 33.8756544048 +33 43 12.026168040   18.80 18.61     ~ 271 1
48 4C 39.37 rG 12 35 04.577 +39 25 41.33   21.4       ~ 70 1
49 7C 125441.29+473632.00 SyG 12 56 57.485 +47 20 20.23   22.0       ~ 285 1
50 7C 132816.2+252436 QSO 13 30 37.6960744824 +25 09 10.983105972   18.31 17.67     ~ 373 1
51 3C 289 QSO 13 45 26.699 +49 46 31.39   23       ~ 161 1
52 3C 294 rG 14 06 44.317 +34 11 30.19           ~ 234 1
53 3C 295 Sy1 14 11 20.6 +52 12 09   22.34 20.80 18.54   ~ 1021 4
54 3C 309.1 Bla 14 59 07.58390804 +71 40 19.8668093   17.24 16.78 17.2   ~ 509 1
55 3C 318.0 QSO 15 20 05.4773966208 +20 16 05.471959692   21.93 20.9     ~ 197 1
56 3C 322 rG 15 35 01.197 +55 36 48.83   23       ~ 126 1
57 3C 324.0 Sy1 15 49 49.170 +21 25 39.50   21.5       ~ 312 1
58 7C 154914.09+625020.00 QSO 15 49 59.206 +62 41 18.31   21.92 20.70     ~ 147 2
59 4C 23.43 Bla 16 24 39.0838297968 +23 45 12.223370412   17.91 17.47     ~ 343 1
60 3C 345 Bla 16 42 58.80997043 +39 48 36.9939552   16.81 16.59 16.84   ~ 1808 3
61 3C 356 QSO 17 24 20.232 +50 57 14.47   21.5 21.5     ~ 225 1
62 4C 16.49 QSO 17 34 42.6025956120 +16 00 32.342065776     18.4     ~ 78 2
63 4C 13.66 rG 18 01 38.956 +13 51 23.87           ~ 51 1
64 3C 368.0 rG 18 05 06.358 +11 01 32.55   21.5       ~ 253 1
65 2C 1569 Bla 18 29 31.7809732968 +48 44 46.160168892   17.05 16.81 16.860   ~ 713 1
66 3C 427.1 rG 21 04 06.87480 +76 33 10.2231   23.3 21.1     ~ 157 1
67 3C 432.0 QSO 21 22 46.3251704424 +17 04 37.916198832   18.18 17.96     ~ 215 2
68 3C 437 rG 21 47 25.107 +15 20 37.51   23       ~ 128 2
69 3C 454.0 QSO 22 51 34.7277468096 +18 48 40.087264428   18.52 18.4     ~ 232 2
70 3C 454.3 Bla 22 53 57.7480438728 +16 08 53.561508864   16.57 16.10 15.22   ~ 3004 2
71 3C 469.1 rG 23 55 22.89 +79 55 21.0   22.5       ~ 85 2
72 3C 470.0 rG 23 58 35.340 +44 04 38.89   22.5       ~ 114 1

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