2009ApJ...697..182T

Query : 2009ApJ...697..182T

2009ApJ...697..182T - Astrophys. J., 697, 182-193 (2009/May-3)

Dust emission from unobscured active galactic nuclei.

THOMPSON G.D., LEVENSON N.A., UDDIN S.A. and SIROCKY M.M.

Abstract (from CDS):

We use mid-infrared (MIR) spectroscopy of unobscured active galactic nuclei (AGNs) to reveal their native dusty environments. We concentrate on Seyfert 1 galaxies, observing a sample of 31 with the Infrared Spectrograph aboard the Spitzer Space Telescope, and compare them with 21 higher luminosity quasar counterparts. Silicate dust reprocessing dominates the MIR spectra, and we generally measure the 10 and 18 µm spectral features weakly in emission in these galaxies. The strengths of the two silicate features together are sensitive to the dust distribution. We present numerical radiative transfer calculations that distinguish between clumpy and smooth geometries, which are applicable to any central heating source, including stars as well as AGNs. In the observations, we detect the obscuring "torus" of unified AGN schemes, modeling it as compact and clumpy. We also determine that star formation increases with AGN luminosity, although the proportion of the galaxies' bolometric luminosity attributable to stars decreases with AGN luminosity.

Abstract Copyright: ∼

Journal keyword(s): dust, extinction - galaxies: active - galaxies: nuclei - infrared: galaxies - radiative transfer

VizieR on-line data: <Available at CDS (J/ApJ/697/182): table1.dat table2.dat table3.dat>

Simbad objects: 57

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Number of rows : 57
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 Mrk 335 Sy1 00 06 19.5372339024 +20 12 10.617404076   14.19 13.85     ~ 1254 0
2 NGC 5 AG? 00 07 48.8659995048 +35 21 44.143442424   14.6       ~ 23 0
3 ESO 12-21 Sy1 00 40 46.0771618200 -79 14 24.134025264   14.53 14.41 13.44   ~ 81 0
4 LEDA 3237 Sy1 00 54 52.1183662680 +25 25 38.983241532     15.42     ~ 387 0
5 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2815 2
6 Mrk 1034B Sy1 02 23 18.9215543016 +32 11 18.495835944   15.2       ~ 85 0
7 Mrk 1034 PaG 02 23 20.45 +32 11 33.7           ~ 73 0
8 NGC 931 Sy1 02 28 14.4689104272 +31 18 41.469363324   15.71 14.74     ~ 398 0
9 M 77 Sy2 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4606 2
10 IRAS 03450+0055 Sy1 03 47 40.1887730832 +01 05 14.048016576   15.09 14.64     ~ 91 0
11 NGC 1566 Sy1 04 20 00.3968473248 -54 56 16.624708764 10.29 10.19 9.73 9.21 10.1 ~ 912 2
12 Mrk 1506 Sy1 04 33 11.0956735296 +05 21 15.619461552   15.72 15.05 10.08   ~ 2000 2
13 ESO 362-18 Sy2 05 19 35.8118941104 -32 39 27.923120568   13.81 13.37 12.73   ~ 246 0
14 IC 450 Sy1 06 52 12.3346265592 +74 25 37.121227716   15.16 14.19     ~ 571 1
15 Mrk 9 Sy1 07 36 57.0265753824 +58 46 13.432215792   14.77 14.37     ~ 245 0
16 Mrk 79 Sy1 07 42 32.8210670808 +49 48 34.783809768   14.74 14.27     ~ 714 1
17 IRAS 07598+6508 Sy1 08 04 30.4643108040 +64 59 52.789588188   14.3 15.5     ~ 231 0
18 Mrk 704 Sy1 09 18 25.9971991776 +16 18 19.633269600   14.82 14.20     ~ 272 0
19 UGC 5101 Sy2 09 35 51.6045544584 +61 21 11.589382368   15.20 15.50     ~ 572 4
20 LEDA 2149945 Sy1 09 50 48.3803143440 +39 26 50.467298496   16.83 16.73     ~ 198 0
21 Mrk 1239 Sy1 09 52 19.168 -01 36 44.10   14.99 14.39 11.2   ~ 322 0
22 PG 0953+414 Sy1 09 56 52.3931554992 +41 15 22.211247636 14.710 15.611 15.546 15.294 14.720 ~ 452 0
23 3C 234.0 Sy1 10 01 49.5227371368 +28 47 08.943487440   18.21 17.27     ~ 431 1
24 NGC 3227 Sy1 10 23 30.5765149296 +19 51 54.282206700   12.61 11.79     ~ 1704 1
25 QSO B1048+342 Sy1 10 51 43.8916339296 +33 59 26.683392840   17.11 16.79     ~ 198 0
26 NGC 3511 EmG 11 03 23.8201544712 -23 05 12.133861188   11.66   10.53 11.1 ~ 157 0
27 NGC 3516 Sy1 11 06 47.4632200800 +72 34 07.298374656   13.12 12.40     ~ 1545 0
28 Ton 1388 Sy1 11 19 08.6786220240 +21 19 17.987085948   14.91 14.80     ~ 466 0
29 2MASS J11243917+4201450 Sy1 11 24 39.1797883104 +42 01 45.014547252   16.45 16.28     ~ 157 0
30 NGC 3783 Sy1 11 39 01.7096819040 -37 44 19.009642992   12.46 13.43 11.33 12.1 ~ 1649 0
31 NGC 4051 Sy1 12 03 09.6101337312 +44 31 52.682601288   11.08 12.92 9.94   ~ 2166 1
32 NGC 4151 Sy1 12 10 32.5759813872 +39 24 21.063527532   12.18 11.48     ~ 3695 2
33 NGC 4253 Sy1 12 18 26.5163572920 +29 48 46.531535472   14.34 13.57     ~ 1041 1
34 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 5806 1
35 NGC 4593 Sy1 12 39 39.4435107024 -05 20 39.034988448   13.95 13.15     ~ 1090 0
36 NGC 4748 Sy1 12 52 12.4650934680 -13 24 53.262019944   14.73 14.03 12.82   ~ 258 0
37 Mrk 231 Sy1 12 56 14.2341182928 +56 52 25.238373852   14.68 13.84     ~ 1989 3
38 LEDA 45656 Sy1 13 09 47.0031619008 +08 19 48.212362524   16.04 15.89     ~ 390 0
39 Ton 1565 Sy1 13 12 17.7526981968 +35 15 21.086467128   15.45 15.64 14.2   ~ 277 1
40 2MASS J13234951+6541480 Sy1 13 23 49.5182430360 +65 41 48.164463600   16.01 15.84     ~ 173 0
41 ESO 383-35 Sy1 13 35 53.7691256160 -34 17 44.160716796   13.89 13.61 8.9   ~ 1488 0
42 IRAS 13349+2438 Sy1 13 37 18.7199358192 +24 23 03.319883484     15.0     ~ 391 0
43 ESO 445-50 Sy1 13 49 19.2601801224 -30 18 34.213815504   13.81 13.66 12.18 12.35 ~ 804 0
44 PB 4142 Sy1 13 54 35.6874184872 +18 05 17.504491992   16.84 16.68     ~ 224 0
45 2MASS J13563279+2103523 Sy1 13 56 32.7981405816 +21 03 52.378155576   15.85 17.07     ~ 99 0
46 Ton 182 Sy1 14 05 16.2178674936 +25 55 34.117540788   15.42 15.34     ~ 253 0
47 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1218 2
48 NGC 5548 Sy1 14 17 59.5400291832 +25 08 12.603122268   14.35 13.73     ~ 2710 0
49 2MASS J14294306+4747262 Sy1 14 29 43.0739786592 +47 47 26.217623904   17.29 16.97     ~ 183 0
50 Mrk 817 Sy1 14 36 22.0820611632 +58 47 39.394934844   14.19 13.79     ~ 523 0
51 NGC 6860 Sy2 20 08 46.8865940304 -61 05 59.782024608   13.70 13.53 12.14   ~ 180 0
52 Mrk 509 Sy1 20 44 09.7504483224 -10 43 24.727155528   13.35 13.12 10.7   ~ 1276 0
53 Mrk 1513 Sy1 21 32 27.8162556672 +10 08 19.252365396   14.92 14.64     ~ 612 0
54 NGC 7213 Sy1 22 09 16.2100443720 -47 10 00.115999716   10.97 12.08 10.50 10.6 ~ 653 0
55 2MASS J22360767+1343554 Sy1 22 36 07.6824548136 +13 43 55.360914636   16.48 16.34     ~ 161 0
56 NGC 7469 Sy1 23 03 15.6 +08 52 26 12.60 13.00 12.34     ~ 2096 3
57 NGC 7603 Sy1 23 18 56.6538277656 +00 14 37.977066096   14.73 14.01     ~ 404 0

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