2003MNRAS.341..993C

Query : 2003MNRAS.341..993C

2003MNRAS.341..993C - Mon. Not. R. Astron. Soc., 341, 993-1004 (2003/May-3)

The radio-loud/radio-quiet dichotomy: news from the 2dF QSO Redshift Survey.

CIRASUOLO M., MAGLIOCCHETTI M., CELOTTI A. and DANESE L.

Abstract (from CDS):

We present a detailed analysis of a sample of radio-detected quasars, obtained by matching together objects from the FIRST survey and the 2dF Quasar Redshift Survey (2dF). The data set consists of 113 sources, spanning a redshift range 0.35 ≲z ≲ 2.2, with optical magnitudes 18.25 ≤bJ≤ 20.85 and radio fluxes S1.4GHz≥ 1 mJy. These objects exhibit properties such as redshift and colour distribution in full agreement with those derived for the whole quasar population, suggesting that the mechanism(s) controlling the birth and lifetime of quasars are independent of their level of radio emission. The long-debated question of the radio-loud/radio quiet (RL/RQ) dichotomy is then investigated for the combined FIRST-2dF and FIRST-LBQS (Large Bright Quasar Survey) samples, as they present similar selection criteria. We find the fraction of radio detections to increase with magnitude from ≲3 per cent at the faintest levels up to ∼20 per cent for the brightest sources. The classical RL/RQ dichotomy, in which the distribution of radio-to-optical ratios and/or radio luminosities shows a lack of sources, is ruled out by our analysis. We also find no tight relationship between optical and radio luminosities for sources in the sample considered, a result that tends to exclude the mass of the quasar black hole as the physical quantity determining the level of radio emission.

Abstract Copyright: 2003 RAS

Journal keyword(s): galaxies: active - quasars: general - cosmology: observations

VizieR on-line data: <Available at CDS (J/MNRAS/341/993): table1.dat>

CDS comments: Table 1: 'FIRST-2dF' quasars have the 2 ID FIRST and 2QZ in SIMBAD.

Simbad objects: 113

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Number of rows : 113
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 [VV96] J095245.4+000017 QSO 09 52 45.5759496144 +00 00 15.526876140   20.10 19.67     ~ 42 0
2 [VV2006] J095306.2+012240 QSO 09 53 06.2722503504 +01 22 41.441845548   19.91 19.58     ~ 27 0
3 [VV2006] J095427.3-025219 QSO 09 54 27.3600867168 -02 52 17.985859140   20.11       ~ 6 0
4 [VV2006] J095508.3-022021 QSO 09 55 08.4282232728 -02 20 20.356566972     20.01     ~ 11 1
5 [VV2006] J095540.1+004841 QSO 09 55 40.1922243360 +00 48 42.151819716   19.55 19.07     ~ 29 0
6 [VV2006] J095546.6+004043 QSO 09 55 46.7200700424 +00 40 43.489894152   19.26       ~ 8 0
7 [VV2006] J095626.8-024317 QSO 09 56 26.8846908888 -02 43 17.077152504   19.54       ~ 8 0
8 [VV2006] J095831.9+001231 QSO 09 58 32.0536144752 +00 12 32.331694392   19.52       ~ 15 0
9 [VV2006] J100409.2+005929 QSO 10 04 09.2207168496 +00 59 29.406848496   20.57       ~ 7 0
10 [VV2006] J100445.5-011917 QSO 10 04 45.5307949704 -01 19 17.009306328     19.26     ~ 15 1
11 [VV2006] J101056.1+013518 QSO 10 10 56.1054848856 +01 35 18.907871172   20.34 20.09     ~ 23 0
12 [VV2006] J101159.1+000043 QSO 10 11 59.1430662744 +00 00 43.648361280   20.34 20.15     ~ 9 0
13 [VV2006] J101216.7+005745 QSO 10 12 16.8036657768 +00 57 46.475247996   20.08 19.96     ~ 30 0
14 [VV2006] J101722.9+001138 QSO 10 17 22.9959447984 +00 11 39.189527412   20.41       ~ 23 0
15 LBQS 1015+0147 QSO 10 17 42.3866557968 +01 32 17.473899264   18.95 18.49     ~ 36 0
16 [VV2006] J102321.7+015212 QSO 10 23 21.7205307576 +01 52 12.717457608   20.42       ~ 7 0
17 [VV2006] J103348.1-023806 QSO 10 33 48.1778146632 -02 38 05.488107324   20.42       ~ 7 0
18 [VV2006] J103415.1-015340 QSO 10 34 15.1652086872 -01 53 39.351138180   20.21       ~ 6 0
19 [VV2006] J104120.0-023442 QSO 10 41 20.0840043144 -02 34 41.293095240   20.43       ~ 15 0
20 [VV2006] J105234.2-001502 QSO 10 52 34.2373629792 -00 15 00.977176836   18.72       ~ 16 0
21 [VV2006] J105332.3-002321 QSO 10 53 32.3102316288 -00 23 20.884920216   19.82 19.51     ~ 8 0
22 [VV2006] J105336.0+000735 QSO 10 53 36.0330931224 +00 07 35.710738572   19.58 19.22     ~ 31 0
23 4C -00.41 QSO 10 54 57.0435467976 -00 45 53.094465216   18.68 18.47     ~ 41 1
24 [VV2006] J105642.7-004256 QSO 10 56 42.7405767240 -00 42 55.918144872   20.21 19.94     ~ 24 0
25 [VV2006] J105858.1-014610 QSO 10 58 58.1575093800 -01 46 09.429502620   19.24       ~ 8 0
26 [VV2006] J110549.6-014525 QSO 11 05 49.6535143128 -01 45 24.055983648   19.14       ~ 6 0
27 [VV2006] J110811.4+001429 QSO 11 08 11.3231036760 +00 14 30.001973532   20.04       ~ 9 0
28 [VV2006] J111344.8-004412 QSO 11 13 44.8427464320 -00 44 11.636037060   19.42 19.12     ~ 26 0
29 2QZ J112005.1-015023 Sy1 11 20 05.1659116416 -01 50 22.019246340   20.16       ~ 7 0
30 [VV2006] J112635.8-021539 QSO 11 26 35.8564035264 -02 15 37.813452048   20.35       ~ 14 1
31 [VV2006] J112912.7-010001 QSO 11 29 12.7118844264 -01 00 00.472774356   20.70       ~ 7 0
32 [VV2006] J112917.3-001152 QSO 11 29 17.2714599120 -00 11 50.866574532   19.71 19.30     ~ 25 0
33 [VV2006] J112918.8-024123 QSO 11 29 18.9186710112 -02 41 22.593832908   19.95       ~ 7 0
34 4C -00.44 QSO 11 29 46.0245180096 -01 21 40.604091480   17.89 19.0     ~ 41 0
35 [VV2006] J113057.7-015539 QSO 11 30 57.7361578968 -01 55 38.630604108   19.02 18.80     ~ 23 0
36 [VV2006] J113144.8-001648 QSO 11 31 44.8668834192 -00 16 47.216763516   19.01       ~ 7 0
37 SDSS J113235.86-012848.5 QSO 11 32 35.8665101136 -01 28 48.585595368   19.25 19.17     ~ 28 1
38 LBQS 1130+0032 Bla 11 33 03.03003160 +00 15 48.9801922   19.13 18.82 19.2   ~ 64 1
39 2QZ J113331.9-003939 Sy1 11 33 31.9513646160 -00 39 38.773553904   20.78       ~ 8 0
40 [VV2006] J113418.3-012254 QSO 11 34 18.3448042032 -01 22 53.365419300   20.19       ~ 7 0
41 [VV2006] J113629.2-015249 QSO 11 36 29.3009423808 -01 52 48.614452140   19.74 19.40     ~ 24 0
42 [VV2006] J113714.2-015335 QSO 11 37 14.2562064120 -01 53 34.277867304   21.14 20.66     ~ 24 1
43 LBQS 1138-0126 QSO 11 41 11.6165271504 -01 43 06.656160756   18.37 17.98     ~ 64 1
44 [VV2006] J114120.2+002256 QSO 11 41 20.26916872 +00 22 56.7801420   20.29       ~ 30 1
45 [VV2006] J114218.7+004403 QSO 11 42 18.7731530904 +00 44 04.189493976   20.46       ~ 7 0
46 [VV2006] J115149.0-014824 QSO 11 51 49.0156049712 -01 48 23.752027008   20.71 20.59     ~ 24 0
47 QSO J1154+0014 QSO 11 54 04.1351305152 +00 14 19.570796880   18.52 18.17     ~ 33 0
48 [VV2006] J120501.8-003215 QSO 12 05 01.7485672176 -00 32 14.462364120   19.08       ~ 14 1
49 2QZ J120506.4+004720 Sy1 12 05 06.4875954792 +00 47 20.894782596   20.49       ~ 9 0
50 QSO B1205-008 Bla 12 07 41.6775663648 -01 06 36.689945688   18.99 18.49 19.5   ~ 53 1
51 QSO J1208-0207 QSO 12 08 36.2967150432 -02 07 26.426447760   19.28 18.95     ~ 29 0
52 [VV2006] J120857.1+002300 QSO 12 08 57.1592746872 +00 23 00.159844272   20.10       ~ 8 0
53 [VV2006] J121407.7-014920 QSO 12 14 07.6891929864 -01 49 19.708423392   19.68 19.40     ~ 26 1
54 [VV2006] J121444.8-011625 QSO 12 14 44.9044738272 -01 16 24.413162772   20.06       ~ 8 0
55 [VV2006] J121729.8-004717 QSO 12 17 29.8484181696 -00 47 15.675120744   20.64 20.27     ~ 24 0
56 [VV2006] J121928.6-015522 QSO 12 19 28.6724531736 -01 55 20.731291572   20.16 19.92     ~ 22 0
57 QSO J1219-0126 QSO 12 19 57.8249040744 -01 26 14.418270348   19.20 18.98     ~ 30 0
58 [VV2006] J122045.9-012116 QSO 12 20 45.9550131264 -01 21 15.546192948   19.07 18.84     ~ 27 0
59 [VV2006] J122130.3-024134 QSO 12 21 30.3946164312 -02 41 33.002758140   20.84 20.30     ~ 23 0
60 [VV2006] J122137.2-002924 QSO 12 21 37.2623116320 -00 29 23.438300244   21.40 21.23     ~ 7 0
61 2QZ J122159.6-013349 Sy1 12 21 59.5877 -01 33 48.299   20.62       ~ 9 0
62 [VV2006] J122326.9-003214 QSO 12 23 26.9637044784 -00 32 13.758241092   19.76       ~ 8 0
63 QSO J1225-0150 QSO 12 25 23.2269366648 -01 50 33.623101320   19.38 18.67     ~ 13 0
64 [VV2006] J122916.0-012616 QSO 12 29 15.9834618553 -01 26 14.779556612   19.64 19.42     ~ 25 1
65 [VV2006] J123723.9-004211 QSO 12 37 23.8702186800 -00 42 09.999459972   19.96 19.75     ~ 27 0
66 QSO B1235+005 QSO 12 37 53.8535048112 +00 16 37.979135184     20.97     ~ 13 0
67 LBQS 1236-0043 QSO 12 38 56.1030181776 -00 59 30.877802772   18.68 18.46     ~ 45 0
68 [VV2006] J124218.0-023357 QSO 12 42 17.9297113248 -02 33 56.440085472   20.32 20.08     ~ 28 0
69 [VV2000] J125243.8+005320 QSO 12 52 43.8639308496 +00 53 20.156215740   18.56 18.34     ~ 33 0
70 [VV2006] J125258.7-004236 QSO 12 52 58.7520446544 -00 42 36.087426792   20.19 19.73     ~ 22 0
71 SDSS J125356.51+002334.8 Sy1 12 53 56.5160376216 +00 23 34.832912460   20.77       ~ 11 1
72 [VV2006] J125756.6-004612 QSO 12 57 56.5736636952 -00 46 11.680384944   19.79 19.57     ~ 25 0
73 [VV2006] J130402.1-003930 QSO 13 04 02.2136238120 -00 39 29.351891952   20.22       ~ 7 0
74 QSO J1310+0008 QSO 13 10 55.8582362616 +00 08 14.495872524   19.50       ~ 10 1
75 [VV2006] J131930.7+010404 QSO 13 19 30.7478312448 +01 04 04.136072268   20.52       ~ 7 0
76 [VV2006] J132509.8+004934 QSO 13 25 09.7094823672 +00 49 34.038817068   19.46       ~ 8 0
77 LBQS 1325+0027 QSO 13 27 50.4537684384 +00 11 56.845677444   18.85 18.53     ~ 38 0
78 [VV2006] J132913.1-003353 QSO 13 29 13.0108773624 -00 33 53.756319888   19.67 19.48     ~ 23 0
79 [VV2006] J133032.0-004758 QSO 13 30 31.8810713568 -00 47 59.288036964   19.88       ~ 8 0
80 [VV2006] J133121.8+000247 QSO 13 31 21.8182533168 +00 02 48.540280992   20.78 20.41     ~ 27 0
81 [VV2006] J133150.5+004519 QSO 13 31 50.5174651128 +00 45 18.860232960   19.61 19.38     ~ 37 0
82 [VV2006] J133636.2-020417 QSO 13 36 36.2555319024 -02 04 16.710713904   19.70 19.33     ~ 31 0
83 [VV2006] J133727.2-022345 QSO 13 37 27.2103061632 -02 23 45.134180700   20.15       ~ 7 0
84 [VV2006] J133731.9-011544 QSO 13 37 31.8891708384 -01 15 43.550532684     19.86     ~ 7 1
85 QSO B1337-013 Bla 13 40 04.61506448 -01 37 46.5437813   19.16 19.13 18.7   ~ 62 1
86 2QZ J134126.5-012228 Sy1 13 41 26.5512934656 -01 22 27.761404044   20.69       ~ 8 0
87 2QZ J134629.2-013921 BLL 13 46 29.2967993328 -01 39 21.252146184   20.39       ~ 9 0
88 [VV2006] J134949.3-011344 QSO 13 49 49.2365336688 -01 13 44.001979284   19.17 18.91     ~ 27 0
89 [VV96] J135053.1-012838 QSO 13 50 53.1406512264 -01 28 38.094727188   20.32 19.90     ~ 37 1
90 [VV2006] J135203.5-011713 QSO 13 52 03.5024210448 -01 17 12.814246212   19.80       ~ 6 0
91 QSO J1354-0034 QSO 13 54 57.2605841640 -00 34 06.484354140   18.59 18.46     ~ 28 1
92 [VV2006] J135931.7+005459 QSO 13 59 31.7321429688 +00 55 00.286398984   18.55 18.47     ~ 28 0
93 [VV2006] J135954.7-001752 QSO 13 59 54.6533272344 -00 17 51.845837784   20.73 20.52     ~ 24 0
94 [VV2006] J135959.0-014455 QSO 13 59 59.0751858288 -01 44 54.250354680   20.68       ~ 11 0
95 [VV2006] J140010.0+010216 QSO 14 00 10.045 +01 02 16.86   20.64       ~ 7 0
96 [VV2006] J140209.1-001522 QSO 14 02 09.1364651640 -00 15 21.688584408   20.82       ~ 8 0
97 2QZ J140224.1+003001 QSO 14 02 24.1606238520 +00 30 02.246281488   19.19 18.91     ~ 41 0
98 [VV2006] J140412.1-001326 Bla 14 04 12.12397931 -00 13 25.0910986   19.38 19.05 18.9   ~ 66 1
99 [VV2006] J140614.8-012938 QSO 14 06 14.8654619832 -01 29 37.801196808   18.77 18.66     ~ 28 0
100 [VV2006] J140832.6+003138 QSO 14 08 32.6506638888 +00 31 38.523688752   20.10 19.87     ~ 26 0
101 [VV2006] J141041.6-002058 QSO 14 10 41.5946285256 -00 20 58.015160736   19.99       ~ 9 0
102 [VV2006] J141519.9+002330 QSO 14 15 19.8307720848 +00 23 30.340174812   18.82 18.57     ~ 28 0
103 [VV2006] J141711.5-023146 QSO 14 17 11.4463807104 -02 31 45.116291424   20.69       ~ 6 0
104 [VV2006] J141942.4-020916 QSO 14 19 42.3811089408 -02 09 15.647362092   20.31 20.05     ~ 23 0
105 [VV2006] J142401.6-023506 QSO 14 24 01.5321301248 -02 35 05.438362632   20.23 19.96     ~ 24 0
106 [VV2006] J142432.4-014612 QSO 14 24 32.3791055304 -01 46 11.123052708   20.03 19.79     ~ 21 0
107 [VV2006] J142509.2-022717 QSO 14 25 09.1400784216 -02 27 16.991944992   19.49 19.27     ~ 26 1
108 [VV2006] J143305.4-013305 QSO 14 33 05.4759005160 -01 33 04.878235008   20.53       ~ 5 0
109 [VV2006] J143410.7-012342 QSO 14 34 10.7723139912 -01 23 41.712018864   19.5 19.55 19.0   ~ 27 0
110 2QZ J143945.8-014742 Sy1 14 39 45.8673257304 -01 47 41.870934708   19.34 19.18     ~ 25 0
111 2QZ J144205.8-024803 Sy1 14 42 05.8261011696 -02 48 03.052624824   20.33 19.88     ~ 11 0
112 [VV2006] J144536.3-011034 QSO 14 45 36.3096241176 -01 10 34.120433676   20.31 20.08     ~ 25 1
113 [VV2006] J144538.9-023056 QSO 14 45 38.8839170424 -02 30 55.956580524   20.76       ~ 7 0

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