2000MNRAS.318.1047M

Query : 2000MNRAS.318.1047M

2000MNRAS.318.1047M - Mon. Not. R. Astron. Soc., 318, 1047-1067 (2000/November-2)

The redshift distribution of FIRST radio sources at 1mJy.

MAGLIOCCHETTI M., MADDOX S.J., WALL J.V., BENN C.R. and COTTER G.

Abstract (from CDS):

We present spectra for a sample of radio sources from the FIRST survey, and use them to define the form of the redshift distribution of radio sources at mJy levels. We targeted 365 sources and obtained 46 redshifts (13per cent of the sample). We find that our sample is complete in redshift measurement to R∼18.6, corresponding to z∼0.2. Galaxies were assigned spectral types based on emission-line strengths. Early-type galaxies represent the largest subset (45per cent) of the sample and have redshifts 0.15≲z≲0.5; late-type galaxies make up 15per cent of the sample and have redshifts 0.05≲z≲0.2; starbursting galaxies are a small fraction (∼6per cent), and are very nearby (z≲0.05). Some 9per cent of the population have Seyfert 1/quasar-type spectra, all at z≳0.8, and 4per cent are Seyfert 2 type galaxies at intermediate redshifts (z∼0.2).

Using our measurements and data from the Phoenix survey (Hopkins et al.), we obtain an estimate for N(z) at S1.4GHz≥1mJy and compare this with model predictions. At variance with previous conclusions, we find that the population of starbursting objects makes up ≲5per cent of the radio population at S∼1mJy.


Abstract Copyright: 2000, Royal Astronomical Society

Journal keyword(s): galaxies: active - galaxies: starburst - cosmology: observations - radio continuum: galaxies

CDS comments: Table 2: objects are 'FIRST JHHMMSS.s+DDMMSS' in SIMBAD.

Simbad objects: 87

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Number of rows : 87
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 FIRST J022953.5+000218 rG 02 29 53.5443279045 +00 02 19.094320634           ~ 1 0
2 NVSS J023014+002233 rG 02 30 14.99014 +00 22 39.8663           ~ 1 0
3 FIRST J023021.7+000511 Rad 02 30 21.741 +00 05 11.13           ~ 1 0
4 [VV2006] J023105.6+000845 QSO 02 31 05.5978276440 +00 08 43.659129804   20.00 19.74     ~ 31 1
5 FIRST J023128.2-000734 rG 02 31 28.2300821870 -00 07 34.600458248           ~ 1 0
6 IC 234 rG 02 31 37.712 -00 08 23.74   15.2   14.46   ~ 36 0
7 NVSS J023155+003844 rG 02 31 57.61128 +00 38 54.5388   22.13   19.75 19.05 ~ 2 0
8 NVSS J023207+002847 Rad 02 32 06.973 +00 28 45.30           ~ 1 0
9 FIRST J023207.9+002526 Rad 02 32 07.960 +00 25 26.82           ~ 1 0
10 FIRST J023209.5-000128 Rad 02 32 09.533 -00 01 28.66           ~ 1 0
11 NVSS J023209+002236 Rad 02 32 09.711 +00 22 36.86           ~ 3 1
12 NVSS J023228+002741 Rad 02 32 28.230 +00 27 43.60           ~ 1 0
13 FIRST J023228.6+000233 Rad 02 32 28.663 +00 02 33.59           ~ 1 0
14 NVSS J023231-000035 Rad 02 32 32.441 -00 00 44.19           ~ 1 0
15 Mrk 1047 Sy2 02 32 47.4203351352 +00 40 41.201313492   16.0       ~ 36 0
16 NVSS J023252+000234 rG 02 32 52.559 +00 02 34.97           ~ 3 1
17 FIRST J023300.3+000235 rG 02 33 00.30967 +00 02 36.0607           ~ 1 0
18 FIRST J023302.8+002405 Rad 02 33 02.875 +00 24 06.07           ~ 1 0
19 FIRST J023305.0+003240 rG 02 33 04.93676 +00 32 41.1849           ~ 1 0
20 FIRST J023308.8+000442 Rad 02 33 08.845 +00 04 42.02           ~ 1 0
21 [VV2006] J023313.8-001215 QSO 02 33 13.8173046336 -00 12 15.352489296   19.73 19.51     ~ 31 0
22 FIRST J023315.5+001834 rG 02 33 15.50741 +00 18 34.4561           ~ 1 0
23 FIRST J023330.1+001448 Rad 02 33 30.195 +00 14 49.08           ~ 1 0
24 NVSS J023331+001028 rG 02 33 31.0940246040 +00 10 24.391033752           ~ 3 0
25 SDSS J023457.58+002130.5 QSO 02 34 57.588 +00 21 30.57           ~ 10 0
26 FIRST J023511.6+000608 QSO 02 35 11.620 +00 06 08.05           ~ 5 0
27 NVSS J023609+001912 rG 02 36 09.32928 +00 18 57.7116           ~ 1 0
28 [VV2006] J023703.9+003922 QSO 02 37 03.8470205280 +00 39 23.214603924   20.93 20.58     ~ 26 0
29 MCG+09-26-047 rG 16 01 28.0904219760 +53 56 50.536677588   16       ~ 39 1
30 2MASS J16051595+5354109 Sy2 16 05 15.9700026624 +53 54 10.850465232 19.89 20.74 19.16     ~ 8 0
31 NVSS J160552+540654 rG 16 05 52.7858213520 +54 06 50.550923268           ~ 15 0
32 7C 160511.09+541350.00 Bla 16 06 23.5659651384 +54 05 55.759093332 17.27 18.16 17.89     ~ 61 1
33 NVSS J160828+541031 rG 16 08 28.3416372368 +54 10 31.155975759 21.2         ~ 5 1
34 2MASX J16085807+5418175 SNR 16 08 57.9858803160 +54 18 18.034292988           ~ 12 1
35 NVSS J160923+544323 rG 16 09 23.23247 +54 43 22.4000           ~ 7 1
36 FIRST J223651.8+001223 rG 22 36 51.9262575216 +00 12 22.698913248           ~ 2 0
37 NVSS J223706-000235 rG 22 37 06.6355325832 -00 02 32.816731344           ~ 10 0
38 FIRST J223728.8+001001 Rad 22 37 28.879 +00 10 00.90           ~ 1 0
39 SDSS J223737.11+002038.8 LIN 22 37 37.1184070861 +00 20 38.868518443           ~ 12 1
40 FIRST J223749.2+001900 rG 22 37 49.3002876024 +00 19 00.759220644           ~ 2 0
41 2MASS J22380242+0023344 Sy2 22 38 02.4206047820 +00 23 34.504554933           ~ 3 0
42 QSO J2238+0016 Sy1 22 38 43.5714295944 +00 16 47.949283164   20.65 19.74     ~ 44 0
43 FIRST J223845.4+000839 rG 22 38 45.41316 +00 08 39.0932           ~ 2 0
44 FIRST J223908.1+003232 rG 22 39 08.1676033152 +00 32 32.161508916           ~ 4 0
45 FIRST J223918.3-000434 rG 22 39 18.388 -00 04 34.69           ~ 3 0
46 FIRST J223932.2+001242 rG 22 39 32.2223494080 +00 12 42.200464464           ~ 3 0
47 FIRST J224125.9+003104 Rad 22 41 26.007 +00 31 05.17           ~ 1 0
48 FIRST J224130.9+002441 rG 22 41 31.08980 +00 24 40.7310           ~ 1 0
49 FIRST J224144.8+003526 rG 22 41 44.89344 +00 35 26.2248           ~ 2 0
50 FIRST J224145.3-000401 rG 22 41 45.14068 -00 04 01.5292           ~ 2 0
51 NVSS J224146-000837 rG 22 41 46.13647 -00 08 44.1831           ~ 2 0
52 SDSS J224146.37+001608.0 Sy1 22 41 46.3772282496 +00 16 08.012865000   20.64 20.38     ~ 22 1
53 FIRST J224202.5+002254 rG 22 42 02.42929 +00 22 53.8414           ~ 1 0
54 FIRST J224210.9-000657 Rad 22 42 10.973 -00 06 58.25           ~ 1 0
55 FIRST J224212.0+000211 rG 22 42 12.036 +00 02 11.98           ~ 3 0
56 FIRST J224212.8+000812 rG 22 42 12.78960 +00 08 12.3036           ~ 2 0
57 FIRST J224215.2+000619 rG 22 42 15.26040 +00 06 19.5048           ~ 2 0
58 2SLAQ J224222.12+001505.7 Sy1 22 42 22.1305214520 +00 15 05.730731244   20.62 20.16     ~ 26 0
59 NVSS J224223+002443 Rad 22 42 23.644 +00 24 41.92           ~ 1 0
60 FIRST J224227.0+002557 rG 22 42 27.06969 +00 25 57.6498           ~ 2 0
61 SDSS J224232.00+001741.1 QSO 22 42 32.00286 +00 17 41.1842           ~ 3 0
62 FIRST J224243.1+001117 rG 22 42 43.14165 +00 11 16.5349           ~ 2 0
63 FIRST J224251.1+001143 rG 22 42 51.15519 +00 11 44.9877           ~ 2 0
64 FIRST J224310.8+002654 Rad 22 43 10.944 +00 26 54.04           ~ 1 0
65 2MASX J22431545+0024290 SB* 22 43 15.454 +00 24 29.04           ~ 1 0
66 FIRST J224322.6+001521 rG 22 43 22.6559252976 +00 15 20.944032300           ~ 3 0
67 NVSS J224325+003321 rG 22 43 25.65455 +00 33 20.5002           ~ 2 0
68 FIRST J224333.2+003751 rG 22 43 33.19584 +00 37 51.6216           ~ 2 0
69 NVSS J224333+000850 Rad 22 43 34.105 +00 08 46.69           ~ 1 0
70 FIRST J224338.0+001749 QSO 22 43 38.0414 +00 17 49.993           ~ 9 0
71 FIRST J224338.4+002517 rG 22 43 38.42916 +00 25 17.7950           ~ 2 0
72 FIRST J224404.4+001216 rG 22 44 04.42053 +00 12 16.6853           ~ 2 0
73 [VV2006] J224459.4+000033 Sy1 22 44 59.4432136392 +00 00 33.473787300   20.06 19.73     ~ 31 0
74 FIRST J224518.3+003445 QSO 22 45 18.364 +00 34 44.88           ~ 2 0
75 NVSS J224533+002643 rG 22 45 32.8675835448 +00 26 40.229817000           ~ 7 0
76 NVSS J224540+001054 rG 22 45 40.12680 +00 10 53.5764           ~ 2 0
77 FIRST J224541.2+000254 rG 22 45 41.26104 +00 02 54.0996           ~ 2 0
78 NVSS J224552+002749 rG 22 45 52.4103335376 +00 27 51.704025552           ~ 8 0
79 NVSS J224554+002309 rG 22 45 54.95666 +00 23 10.1579   16.3       ~ 9 0
80 FIRST J224559.0-000414 rG 22 45 59.025 -00 04 14.47           ~ 5 0
81 SDSS J224611.88+003232.8 QSO 22 46 11.8910475216 +00 32 32.838911556   19.98 19.65     ~ 20 0
82 NVSS J224642+002842 rG 22 46 41.776 +00 28 36.65           ~ 4 0
83 NVSS J224653-000807 rG 22 46 53.5384931328 -00 08 09.588294564           ~ 7 0
84 FIRST J224705.6+003531 rG 22 47 05.69964 +00 35 31.1481           ~ 2 0
85 ICRF J224730.1+000006 BLL 22 47 30.19599756 +00 00 06.4623909   20.01 19.27 18.17   ~ 93 1
86 NVSS J224754+000437 rG 22 47 54.30274 +00 04 37.9167           ~ 2 0
87 LEDA 1158503 Sy1 22 48 24.6324279696 +00 09 20.657522844   18.38 17.78     ~ 20 0

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