2012ApJ...745..172D

Query : 2012ApJ...745..172D

2012ApJ...745..172D - Astrophys. J., 745, 172 (2012/February-1)

Spitzer Mid-IR spectroscopy of powerful 2 jy and 3CRR radio galaxies. I. Evidence against a strong Starburst-AGN connection in radio-loud AGN.

DICKEN D., TADHUNTER C., AXON D., MORGANTI R., ROBINSON A., KOUWENHOVEN M.B.N., SPOON H., KHARB P., INSKIP K.J., HOLT J., RAMOS ALMEIDA C. and NESVADBA N.P.H.

Abstract (from CDS):

We present deep Spitzer/Infrared Spectrograph (IRS) spectra for complete samples of 46 2 Jy radio galaxies (0.05 < z < 0.7) and 19 3CRR FRII radio galaxies (z < 0.1), and use the detection of polycyclic aromatic hydrocarbon (PAH) features to examine the incidence of contemporaneous star formation and radio-loud active galactic nucleus (AGN) activity. Our analysis reveals PAH features in only a minority (30%) of the objects with good IRS spectra. Using the wealth of complementary data available for the 2 Jy and 3CRR samples we make detailed comparisons between a range of star formation diagnostics: optical continuum spectroscopy, mid- to far-IR (MFIR) color, far-IR excess and PAH detection. There is good agreement between the various diagnostic techniques: most candidates identified to have star formation activity on the basis of PAH detection are also identified using at least two of the other techniques. We find that only 35% of the combined 2 Jy and 3CRR sample show evidence for recent star formation activity (RSFA) at optical and/or MFIR wavelengths. This result argues strongly against the idea of a close link between starburst and powerful radio-loud AGN activity, reinforcing the view that, although a large fraction of powerful radio galaxies may be triggered in galaxy interactions, only a minority are triggered at the peaks of star formation activity in major, gas-rich mergers. However, we find that compact radio sources (D < 15 kpc) show a significantly higher incidence of RSFA (>75%) than their more extended counterparts (~15%-25%). We discuss this result in the context of a possible bias toward the selection of compact radio sources triggered in gas-rich environments.

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Journal keyword(s): galaxies: active - infrared: galaxies

Simbad objects: 102

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Number of rows : 102
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 QSO B0023-263 BLL 00 25 49.15629900 -26 02 12.6141092   20.30 19.5 18.084   ~ 173 1
2 3C 15 SyG 00 37 04.1107321824 -01 09 08.407668996   15.34       ~ 232 1
3 ICRF J003820.5-020740 Sy1 00 38 20.52934376 -02 07 40.5469964   19.04 18.02 17.6   ~ 255 1
4 3C 18.0 Sy1 00 40 50.5382453904 +10 03 26.625575952   18.5       ~ 160 1
5 LEDA 2822314 Sy2 00 42 08.91888 -44 13 59.9592     19.5 18.700   ~ 62 1
6 LEDA 2702 Sy2 00 46 17.7417441048 -42 07 51.432348432   17   15.78   ~ 93 0
7 2MASS J00504031-2704390 LIN 00 50 40.31136 -27 04 39.0036   18.369   18.305   ~ 40 0
8 2C 92 Sy2 01 08 16.9314 -16 04 21.477     20     ~ 73 1
9 2C 94 Sy2 01 08 52.8701830824 +13 20 14.262799812   15.19       ~ 494 2
10 3C 35 QSO 01 12 02.2561727808 +49 28 34.990660524     15.6     ~ 146 0
11 3C 38 Sy2 01 20 27.1052 -15 20 18.344     20.0     ~ 88 1
12 NGC 520 AGN 01 24 35.07120 +03 47 32.6760 12.41 12.24 11.42     ~ 528 3
13 NGC 660 Sy2 01 43 02.350 +13 38 44.45   12.02 11.16     ~ 588 2
14 LEDA 87896 AGN 01 51 51.4245944592 -18 30 46.601041068   18.77       ~ 41 1
15 3C 62 Sy2 02 15 37.4257228872 -12 59 30.243550020     18.0     ~ 112 1
16 PKS J0237-1932 Sy1 02 37 43.4632080699 -19 32 33.658238490     21.3     ~ 76 1
17 NGC 1097 LIN 02 46 19.059 -30 16 29.68 10.46 9.97 9.48 8.72 9.8 ~ 1448 3
18 PKS 0252-712 rG 02 52 46.15578 -71 04 35.2742   19.0 19.0     ~ 104 1
19 NGC 1222 Sy2 03 08 56.7398731608 -02 57 18.587969280   13.3   13.0 13.2 ~ 210 0
20 2MASX J03274981+1616594 LIN 03 27 49.81440 +16 16 59.4012       21.20   ~ 52 0
21 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1987 2
22 IC 342 AGN 03 46 48.514 +68 05 45.98   10.5       ~ 1579 1
23 4C 05.16 Sy1 03 49 46.48656 +05 51 41.6196     20.9     ~ 75 1
24 LEDA 13982 Sy2 03 51 35.7643720392 -27 44 34.896912468   16.0       ~ 157 1
25 2C 349 Sy2 03 58 54.4370049840 +10 26 02.791855968   16.68 15.41     ~ 356 2
26 3C 105.0 Sy2 04 07 16.4671273272 +03 42 25.813809432   18.5       ~ 241 0
27 PKS 0409-75 rG 04 08 48.66331 -75 07 20.6247   21.40 21.7     ~ 84 1
28 NGC 1614 Sy1 04 34 00.027 -08 34 44.57   14.66 13.99     ~ 697 1
29 LEDA 745026 Sy2 04 44 37.7077672896 -28 09 54.445127796   18.5       ~ 104 1
30 LEDA 2816449 Sy2 05 04 36.53952 -19 37 03.1332           ~ 39 1
31 NGC 2146 AGN 06 18 37.710 +78 21 25.27 11.67 11.38 10.59     ~ 765 2
32 PKS 0620-526 rG 06 21 43.30328 -52 41 33.2978     15.5 19.34   ~ 92 1
33 ESO 161-7 IG 06 26 21.49 -53 41 09.2   14.48 15.4 15.16   ~ 77 2
34 QSO B0625-354 BLL 06 27 06.7286533392 -35 29 15.363665088   14.93       ~ 206 1
35 4C 56.16 rG 07 49 48.077 +55 54 19.45           ~ 176 1
36 2XMM J080535.0+240951 Sy2 08 05 35.0054956728 +24 09 50.330022516   15.46       ~ 336 1
37 3C 195 Sy1 08 08 53.6297647896 -10 27 39.744541656   17.14 18 15.76   ~ 112 1
38 NGC 2623 LIN 08 38 24.016 +25 45 16.29 14.10 13.99 13.36     ~ 533 2
39 PKS J0901-2555 SyG 09 01 47.2741003747 -25 55 16.067903655   18.5       ~ 71 1
40 MCG-02-24-007 LIN 09 18 05.66848602 -12 05 43.8060823   14.38 14.8     ~ 1077 1
41 ATO J146.9381+07.4223 Sy1 09 47 45.1433922288 +07 25 20.595729756   17.37 16.95     ~ 389 1
42 4C 73.08 Sy2 09 49 45.967 +73 14 23.25   16.00   11.7   ~ 127 0
43 3C 236.0 BLL 10 06 01.75023017 +34 54 10.4016113   15.97       ~ 473 2
44 NGC 3256 Sy2 10 27 51.284 -43 54 13.55   11.83 11.33 10.62 11.9 ~ 920 2
45 NGC 3310 AGN 10 38 45.85707 +53 30 11.8940   12.45 12.15     ~ 809 1
46 IRAS 10565+2448 LIN 10 59 18.12811 +24 32 34.7357   15.7       ~ 302 0
47 M 108 AGN 11 11 30.967 +55 40 26.84   10.70       ~ 497 1
48 NGC 3628 LIN 11 20 17.018 +13 35 22.16   10.42 9.48 9.22   ~ 853 3
49 QSO J1139-1350 Bla 11 39 10.7025556152 -13 50 43.639196064   16.38 16.17 16.4   ~ 284 1
50 ICRF J115421.7-350529 Sy1 11 54 21.7842834888 -35 05 29.079469716   18.81 17.84     ~ 139 1
51 NGC 4088 AGN 12 05 34.2230093952 +50 32 21.064017876   11.2       ~ 428 1
52 IRAS 12112+0305 PaG 12 13 45.98880 +02 48 39.9600           ~ 373 0
53 [CGM90] IRAS 12112+0305 NE rG 12 13 46.10735 +02 48 41.4959           ~ 369 0
54 NGC 4194 rG 12 14 09.615 +54 31 35.93   13.79 13.30     ~ 467 2
55 NGC 4385 AGN 12 25 42.8099950872 +00 34 21.278141652   14.63 14.12 13.1 12.8 ~ 285 0
56 NGC 4676 IG 12 46 10.18 +30 43 53.7   14.1       ~ 318 0
57 3C 277.3 BLL 12 54 12.0071453880 +27 37 33.952663740   15.94       ~ 379 1
58 NGC 4818 Sy2 12 56 48.907 -08 31 31.08   11   10.88   ~ 160 1
59 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1582 2
60 PKS 1306-09 rG 13 08 39.1573432224 -09 50 32.424542340   20.767 20.500 18.439   ~ 81 1
61 6C 131905+425044 Sy2 13 21 17.813 +42 35 15.38   16.86 16.23     ~ 282 1
62 2MASS J13362231-2627338 LIN 13 36 22.31064 -26 27 33.8832   17.93   16.90 16.27 ~ 41 1
63 NGC 5256 PaG 13 38 17.81 +48 16 41.2   14.1 13.42     ~ 449 1
64 Z 162-21 BLL 13 52 17.8719816576 +31 26 46.487381604   16.10 15.10     ~ 502 3
65 QSO B1355-4138 BLL 13 59 00.1848056808 -41 52 52.639227912   15.76 15.86 16.37   ~ 152 0
66 IRAS 14197+0812 LIN 14 22 11.6354625144 +07 59 28.013201808           ~ 33 0
67 LEDA 52270 Sy1 14 37 38.2867288488 -15 00 24.087592692   16.58 16.40     ~ 300 2
68 IC 1065 Sy2 14 49 21.5927137128 +63 16 13.799495280   17.30 16.39     ~ 378 1
69 3C 321 Sy1 15 31 43.46520 +24 04 18.9948   16.0   15.40   ~ 341 1
70 IC 1127 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 3090 4
71 3C 326 Rad 15 52 24.9 +20 05 57   17.87 17.08     ~ 226 3
72 LEDA 2828587 Sy1 15 55 21.38568 -79 40 36.3288   19.0 19.0     ~ 53 1
73 IRAS 15599+0206 Sy1 16 02 27.3724911037 +01 57 56.238625559   17.70 16.31     ~ 250 1
74 3C 327.1 Sy1 16 04 45.4065607140 +01 17 50.317968747   20.5       ~ 138 1
75 IRAS 16334+4630 LIN 16 34 52.34448 +46 24 52.7796   17.66       ~ 52 1
76 MCG+01-43-006 SyG 16 51 07.9886687784 +04 59 35.547131472     18.25     ~ 502 1
77 LEDA 60189 LIN 17 23 21.96264 -00 17 00.8088   15.1       ~ 454 0
78 ICRF J173735.7-563403 Sy2 17 37 35.7711421992 -56 34 03.153321552   17.0       ~ 96 0
79 V* S Oct Mi* 18 08 44.4823933728 -86 47 55.547907252   11.55 10.71 10.94   M4/6e 35 0
80 QSO B1814-637 Bla 18 19 35.00241 -63 45 48.1926   16.80 14.40 13.4   ~ 154 1
81 Z 173-14 Sy1 18 35 03.3896172576 +32 41 46.855964616   16.50 15.39 10.50   ~ 688 1
82 3C 390.3 Bla 18 42 08.9904975672 +79 46 17.127835104   16.06 15.38     ~ 1381 1
83 PKS 1839-48 rG 18 43 14.61807 -48 36 23.1997   16.79 17.5 15.25   ~ 64 1
84 3C 388.0 SyG 18 44 02.3840387736 +45 33 29.628672300   16.91 15.56     ~ 338 1
85 QSO B1932-464 Sy2 19 35 56.41468 -46 20 40.4826     19.9     ~ 93 1
86 ICRF J193925.0-634245 Sy2 19 39 25.0245304992 -63 42 45.640373400   18.87 18.37 17.64   ~ 1332 2
87 PKS J1941-1524 Sy1 19 41 14.9996710393 -15 24 31.311811663           ~ 83 1
88 3C 403.0 Sy2 19 52 15.7996999344 +02 30 24.238200816   15.42 16.5     ~ 353 1
89 LEDA 63899 EmG 19 58 29.1197853864 -55 09 12.876222276   16.5       ~ 63 0
90 6dFGS gJ204418.2-164017 LIN 20 44 18.16392 -16 40 16.8132   18.02   17.04   ~ 100 0
91 ICRF J213745.1-143255 Sy1 21 37 45.1959922824 -14 32 55.695508728 15.41 15.63 15.53 15.0   ~ 390 1
92 ICRF J213750.0-204231 Sy1 21 37 50.00785656 -20 42 31.6728477   20.400 19.4 19.286   ~ 102 1
93 3C 444 rG 22 14 25.752 -17 01 36.29     17.8     ~ 171 1
94 NGC 7252 AGN 22 20 44.7748209648 -24 40 41.909518200 12.26 12.46 12.06 11.57   ~ 720 1
95 LEDA 68751 Sy1 22 23 49.5398449645 -02 06 12.856394895   16.93 15.77 16.02   ~ 511 2
96 3C 452 Sy2 22 45 48.7616172744 +39 41 15.906782184   17.60 16.56     ~ 391 1
97 NAME South America rG 22 51 49.27872 -17 52 24.0600   16.97       ~ 348 3
98 LEDA 2831507 Sy2 22 53 03.40 -40 57 49.6     20.0     ~ 108 1
99 ICRF J231635.1+040518 Sy2 23 16 35.1933566880 +04 05 18.297101076   17.54 16.68 17.220   ~ 309 1
100 IRAS 23233+0946 LIN 23 25 56.1378291192 +10 02 49.715916252           ~ 61 0
101 NGC 7714 AGN 23 36 14.1257730600 +02 09 18.197422668   14.91 14.36     ~ 788 1
102 LEDA 73132 Sy2 23 59 04.31090 -60 54 59.2180   16.61       ~ 155 1

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