2008MNRAS.385L.130N

Query : 2008MNRAS.385L.130N

2008MNRAS.385L.130N - Mon. Not. R. Astron. Soc., 385, L130-L134 (2008/March-3)

Spectral decomposition of starbursts and active galactic nuclei in 5-8 µm Spitzer-IRS spectra of local ultraluminous infrared galaxies.

NARDINI E., RISALITI G., SALVATI M., SANI E., IMANISHI M., MARCONI A. and MAIOLINO R.

Abstract (from CDS):

We present an analysis of the 5-8 µm Spitzer-IRS spectra of a sample of 68 local ultraluminous infrared galaxies (ULIRGs). Our diagnostic technique allows a clear separation of the active galactic nucleus (AGN) and starburst (SB) components in the observed mid-infrared emission, and a simple analytic model provides a quantitative estimate of the AGN/SB contribution to the bolometric luminosity. We show that AGN are ∼30 times brighter at 6 µm than SBs with the same bolometric luminosity, so that even faint AGN can be detected. Star formation events are confirmed as the dominant power source for extreme IR activity, since ∼85 per cent of ULIRG luminosity arises from the SB component. None the less an AGN is present in the majority (46/68) of our sources.

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

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

Simbad objects: 70

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Number of rows : 70
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 2MASX J00212652-0839261 LIN 00 21 26.5135306416 -08 39 25.967117268   18.37       ~ 124 1
2 IRAS 00456-2904 AGN 00 48 06.7010068082 -28 48 18.548437413   18.14       ~ 61 1
3 2MASS J00504031-2704390 LIN 00 50 40.31136 -27 04 39.0036   18.369   18.305   ~ 40 0
4 IRAS 01003-2238 Sy2 01 02 49.9920152640 -22 21 57.262136544   18.62 18.9 17.83   ~ 192 0
5 6dFGS gJ011907.7-082910 H2G 01 19 07.5686096832 -08 29 09.527103312   18.54       ~ 54 1
6 LEDA 89903 AGN 01 32 21.39936 -07 29 08.3112   19.04       ~ 67 0
7 LEDA 74053 Sy1 01 59 13.7621836560 -29 24 34.941722688   18.18 18.20     ~ 55 1
8 NVSS J024346+040636 rG 02 43 46.05240 +04 06 38.1960           ~ 44 1
9 2MASX J03274981+1616594 LIN 03 27 49.81440 +16 16 59.4012       21.20   ~ 52 0
10 IRAS 04103-2838 LIN 04 12 19.4458581600 -28 30 24.933273876     16.9     ~ 75 0
11 IRAS 05189-2524 Sy2 05 21 01.3994605776 -25 21 45.321827832   15.47 14.75     ~ 545 0
12 IRAS 08572+3915 LIN 09 00 25.38288 +39 03 54.2988     16.66     ~ 450 1
13 IRAS 09039+0503 LIN 09 06 34.0537343016 +04 51 27.447987744           ~ 86 0
14 IRAS 09116+0334 LIN 09 14 13.7940669768 +03 22 01.298301168           ~ 55 0
15 Z 289-11 Sy2 09 35 51.6045544584 +61 21 11.589382368   15.20 15.50     ~ 617 2
16 IRAS 09539+0857 Sy2 09 56 34.33800 +08 43 06.2472       20.90   ~ 63 0
17 IRAS 10190+1322 PaG 10 21 42.718 +13 06 55.36           ~ 88 0
18 2MASS J10214273+1306556 LIN 10 21 42.8040022344 +13 06 55.957660596   17.51       ~ 87 0
19 IRAS 10378+1109 Sy1 10 40 29.1640944744 +10 53 18.202070076   17.79 17.18     ~ 115 1
20 LEDA 32516 LIN 10 51 03.67 -15 03 19.8           ~ 47 0
21 IRAS 10494+4424 LIN 10 52 23.56560 +44 08 47.4250           ~ 73 0
22 LEDA 125693 LIN 11 12 03.37008 -02 54 22.7232   17.45 17.40     ~ 113 1
23 6dFGS gJ111531.6-271622 LIN 11 15 31.60392 -27 16 23.2356   18.15   16.98   ~ 31 0
24 IRAS 11387+4116 LIN 11 41 22.0303797864 +40 59 50.311419684           ~ 53 0
25 IRAS 11506+1331 rG 11 53 14.22000 +13 14 27.6400   17.77       ~ 67 0
26 LEDA 90164 Sy2 12 09 45.1187842872 -05 01 13.431047484   17.52 17.8 16.56   ~ 114 1
27 IRAS 12112+0305 PaG 12 13 45.98880 +02 48 39.9600           ~ 373 0
28 [CGM90] IRAS 12112+0305 NE rG 12 13 46.10735 +02 48 41.4959           ~ 369 0
29 2MASX J12151913-1429422 LIN 12 15 19.134 -14 29 42.23           ~ 43 0
30 IRAS 12359-0725 LIN 12 38 31.6218196828 -07 42 25.396728851   19.40   18.23   ~ 34 0
31 Z 294-4 Sy1 12 56 14.2341182928 +56 52 25.238373852   14.68 13.84     ~ 2096 3
32 2MASS J13362231-2627338 LIN 13 36 22.31064 -26 27 33.8832   17.93   16.90 16.27 ~ 41 1
33 Z 271-60 Sy2 13 44 42.1883001099 +55 53 13.596220922   15.68 14.91     ~ 958 3
34 PKS 1345+12 Sy2 13 47 33.36161873 +12 17 24.2398927   19.28 18.44 15.718   ~ 652 2
35 2MASX J13481941-3012017 Sy2 13 48 19.4115734304 -30 12 01.486438740   18.86 17.71     ~ 33 0
36 NVSS J135331+042804 rG 13 53 31.5653985768 +04 28 05.087231904           ~ 38 0
37 IRAS 13539+2920 rG 13 56 10.01233 +29 05 35.5160   17.23       ~ 70 0
38 IRAS 14060+2919 rG 14 08 19.0356546744 +29 04 47.143121916           ~ 68 0
39 IRAS 14197+0812 LIN 14 22 11.6354625144 +07 59 28.013201808           ~ 33 0
40 2MASX J14280106-1603400 LIN 14 28 01.09392 -16 03 39.7692   18.62   17.43   ~ 31 0
41 LEDA 52270 Sy1 14 37 38.2867288488 -15 00 24.087592692   16.58 16.40     ~ 300 2
42 2MASX J15155520-2009172 Sy2 15 15 55.1783451792 -20 09 16.916691024   18.34 17.1 17.16   ~ 55 0
43 IRAS 15206+3342 Sy2 15 22 38.104 +33 31 35.90           ~ 111 0
44 IRAS 15225+2350 rG 15 24 43.8702463632 +23 40 10.269173100           ~ 55 0
45 2MASX J15265942+3558372 LIN 15 26 59.44451 +35 58 37.0521   15.61       ~ 295 1
46 IC 1127 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 3090 4
47 LEDA 90222 Sy1 15 48 56.8020209304 -04 59 33.598051584   16.4 16.40 16.85   ~ 106 0
48 LEDA 90237 LIN 16 11 40.4280459768 -01 47 06.566246232   16.6       ~ 95 0
49 LEDA 2817004 Sy2 16 18 09.4114 +01 39 20.951           ~ 44 1
50 LEDA 2817027 LIN 16 48 01.65288 +51 55 44.3352           ~ 37 0
51 SDSS J164914.09+342513.1 G 16 49 14.09177 +34 25 13.1998           ~ 55 0
52 IRAS 16474+3430 PaG 16 49 14.20173 +34 25 09.6170           ~ 61 0
53 IRAS 16487+5447 LIN 16 49 46.9430396033 +54 42 35.317832914   17.5       ~ 68 1
54 NGC 6240 Sy2 16 52 58.9 +02 24 03   14.31 13.37     ~ 1734 2
55 LEDA 90270 LIN 17 03 41.92968 +58 13 44.5512           ~ 62 0
56 LEDA 165716 LIN 17 04 28.4433405168 +67 16 28.258598748     17.0     ~ 59 0
57 2MASX J17185436+5441486 Sy2 17 18 54.4002 +54 41 48.289           ~ 84 1
58 LEDA 60189 LIN 17 23 21.96264 -00 17 00.8088   15.1       ~ 454 0
59 NAME Super Antennae Sy2 19 31 21.4272801984 -72 39 21.442847832   17.39 16.37 14.65   ~ 318 3
60 [VV2000] J201329.8-414735 QSO 20 13 29.55552 -41 47 35.0592   17.0       ~ 141 2
61 6dFGS gJ204418.2-164017 LIN 20 44 18.16392 -16 40 16.8132   18.02   17.04   ~ 100 0
62 ESO 286-19 LIN 20 58 26.8183783008 -42 38 59.411838156   14.79 14.79 14.20   ~ 318 0
63 LEDA 1049091 AGN 21 23 29.13960 -05 06 56.2392           ~ 37 1
64 LEDA 66703 Sy1 21 24 41.6403183696 -17 44 45.886080696   17.18 16.50 15.95   ~ 96 0
65 2MASX J21354580-2332359 LIN 21 35 45.8178571488 -23 32 36.305302884           ~ 41 1
66 LEDA 165898 AGN 22 23 28.88208 -27 00 03.1788   17.50       ~ 46 1
67 NAME South America rG 22 51 49.27872 -17 52 24.0600   16.97       ~ 348 3
68 ESO 148-2 Sy2 23 15 46.76280 -59 03 15.6924   14.94 14.73 13.95   ~ 289 1
69 IRAS 23233+0946 LIN 23 25 56.1378291192 +10 02 49.715916252           ~ 61 0
70 2MASS J23351192+2930002 LIN 23 35 11.92032 +29 30 00.2124           ~ 56 0

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