2000A&A...359..887L

Query : 2000A&A...359..887L

2000A&A...359..887L - Astronomy and Astrophysics, volume 359887-899 (2000/7-3)

Mid-infrared diagnostics to distinguish AGNs from starbursts.

LAURENT O., MIRABEL I.F., CHARMANDARIS V., GALLAIS P., MADDEN S.C., SAUVAGE M., VIGROUX L. and CESARSKY C.

Abstract (from CDS):

We present new mid-infrared (MIR) diagnostics to distinguish emission of active galactic nuclei (AGN) from that originating in starburst regions. Our method uses empirical spectroscopic criteria based on the fact that MIR emission from star forming or active galaxies arises mostly from HII regions, photo-dissociation regions (PDRs) and AGNs. The analysis of the strength of the 6.2µm Unidentified Infrared Band (UIB) and the MIR continuum shows that UIBs are very faint or absent in regions harboring the intense and hard radiation fields of AGNs and pure HII regions, where the UIB carriers could be destroyed. The MIR signature of AGNs is the presence of an important continuum in the 3-10µm band which originates from very hot dust heated by the intense AGN radiation field. Using these two distinct spectral properties found in our MIR templates, we build diagnostic diagrams which provide quantitative estimates of the AGN, PDR and HII region contribution in a given MIR spectrum. This new MIR classification can be used to reveal the presence of AGNs highly obscured by large columns of dust.

Abstract Copyright: ∼

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

Simbad objects: 45

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Number of rows : 45
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 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3588 2
2 IC 1623 IG 01 07 47.24 -17 30 25.0   15       ~ 338 2
3 NGC 520 AGN 01 24 35.07120 +03 47 32.6760 12.41 12.24 11.42     ~ 528 3
4 M 77 Sy2 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4897 2
5 NGC 1097 LIN 02 46 19.059 -30 16 29.68 10.46 9.97 9.48 8.72 9.8 ~ 1448 3
6 NGC 1143 IG 02 55 09.7142741256 -00 10 40.248085584   13.2       ~ 154 1
7 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1987 2
8 NGC 1569 rG 04 30 49.186 +64 50 52.52 11.72 11.86 11.03     ~ 1297 3
9 NGC 1808 Sy2 05 07 42.343 -37 30 46.98 11.05 10.80 9.94 9.36 10.2 ~ 756 3
10 M 1 SNR 05 34 31.8 +22 01 03           ~ 6516 1
11 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5476 0
12 UGCA 116 AGN 05 55 42.645 +03 23 32.23 10.74 11.68 11.46   11.82 ~ 561 0
13 IC 443 SNR 06 17 00.0000000 +22 34 11.998901           ~ 1314 1
14 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
15 NGC 3147 Sy2 10 16 53.6388580752 +73 24 02.641798224   11.43 10.61     ~ 533 2
16 NGC 3256 Sy2 10 27 51.284 -43 54 13.55   11.83 11.33 10.62 11.9 ~ 920 2
17 NGC 3263 Sy1 10 29 13.396 -44 07 22.52   11.46   10.23   ~ 61 1
18 NGC 3690C G 11 28 30.70 +58 33 48.4           ~ 351 0
19 NGC 3690 IG 11 28 31.0 +58 33 41   13.19 12.86     ~ 1015 4
20 NGC 3690B GiP 11 28 31.02 +58 33 40.7   11.8       ~ 635 4
21 NGC 3690NE AGN 11 28 33.07 +58 33 54.2   11.8       ~ 635 4
22 NGC 4038 EmG 12 01 53.002 -18 52 03.32   10.91   9.74 11.0 ~ 1364 1
23 NAME Antennae IG 12 01 53.170 -18 52 37.92           ~ 1749 0
24 NGC 4039 GiP 12 01 53.51 -18 53 10.3   11.08   9.77   ~ 1173 1
25 NGC 4676A AGN 12 46 10.05987 +30 43 54.6380           ~ 286 2
26 NGC 4676 IG 12 46 10.18 +30 43 53.7   14.1       ~ 318 0
27 Z 294-4 Sy1 12 56 14.2341182928 +56 52 25.238373852   14.68 13.84     ~ 2096 3
28 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
29 M 51 Sy2 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4565 4
30 M 83 SBG 13 37 00.91920 -29 51 56.7400 8.85 8.11 7.52 7.21   ~ 2778 2
31 Z 271-60 Sy2 13 44 42.1883001099 +55 53 13.596220922   15.68 14.91     ~ 958 3
32 IC 1127 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 3090 4
33 AJG 44 Psr 16 17 33.000 -51 02 00.00           ~ 552 3
34 NGC 6240 Sy2 16 52 58.9 +02 24 03   14.31 13.37     ~ 1734 2
35 LEDA 60189 LIN 17 23 21.96264 -00 17 00.8088   15.1       ~ 454 0
36 NAME Kepler's SN SNR 17 30 40.51 -21 29 14.4           ~ 851 3
37 NGC 6618 OpC 18 20 47 -16 10.3           ~ 1700 0
38 NAME Super Antennae Sy2 19 31 21.4272801984 -72 39 21.442847832   17.39 16.37 14.65   ~ 318 3
39 NGC 6814 Sy1 19 42 40.5862186152 -10 19 25.108718844   15.33 14.21 11.7 11.3 ~ 866 0
40 ESO 286-19 LIN 20 58 26.8183783008 -42 38 59.411838156   14.79 14.79 14.20   ~ 318 0
41 NGC 7023 OpC 21 01 36.9 +68 09 48           ~ 739 0
42 NGC 7252 AGN 22 20 44.7748209648 -24 40 41.909518200 12.26 12.46 12.06 11.57   ~ 720 1
43 IRAS 23060+0505 Sy1 23 08 33.9537309816 +05 21 29.751752412           ~ 160 0
44 ESO 148-2 Sy2 23 15 46.76280 -59 03 15.6924   14.94 14.73 13.95   ~ 289 1
45 NAME Cas A SNR 23 23 26.0 +58 48 41     14.30     ~ 3033 1

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