2000ApJ...528..179M

Query : 2000ApJ...528..179M

2000ApJ...528..179M - Astrophys. J., 528, 179-185 (2000/January-1)

New mid-infrared diagnostic of the dusty torus model for Seyfert nuclei.

MURAYAMA T., MOURI H. and TANIGUCHI Y.

Abstract (from CDS):

We propose a new diagnostic of the ``dusty torus'' model for Seyfert nuclei. Dust grains in the torus are heated by the nuclear continuum and reradiate mostly in the mid-infrared wavelengths. From the geometry of the torus, it is predicted that the emission at λ≤10 µm has strong dependence on the viewing angle. Since the dependence is predicted to be insignificant at λ≥10 µm, we study the flux ratio between 3.5 µm (L band) and 25 µm; R(L,25)=log[(ν3.5µmS(ν3.5µm))/(ν25µmS(ν25µm))]. In three different samples (optically selected, X-ray-selected, and infrared-selected samples) of Seyfert galaxies, the observed values of R(L, 25) between type 1 Seyfert galaxies (S1's) and type 2 Seyfert galaxies (S2's) are found to be clearly separated; R(L, 25)>-0.6 for S1's while R(L, 25)←0.6 for S2's. This implies universality of their torus properties. With this result and the other observational characteristics, we investigate the most plausible torus model among those presented in Pier & Krolik.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: ISM - Galaxies: Seyfert - Infrared: Galaxies

CDS comments: T. 1 : Galaxy 2237+07 = UGC 12138

Simbad objects: 46

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Number of rows : 46
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 Mrk 335 Sy1 00 06 19.5372339024 +20 12 10.617404076   14.19 13.85     ~ 1344 0
2 NGC 262 Bla 00 48 47.14147900 +31 57 25.0845702 14.04 13.90 13.06 8.53   ~ 778 2
3 Mrk 1502 Sy1 00 53 34.9331107632 +12 41 35.929269132   14.41 14.03     ~ 1242 1
4 NGC 863 Sy2 02 14 33.5604714720 -00 46 00.181845336   14.48 13.81 17.9   ~ 770 0
5 NGC 931 Sy1 02 28 14.4689104272 +31 18 41.469363324   15.71 14.74     ~ 426 1
6 M 77 Sy2 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4897 2
7 NGC 1275 Bla 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4243 3
8 MCG+01-12-009 Bla 04 33 11.0956735296 +05 21 15.619461552   15.72 15.05 10.08   ~ 2099 2
9 Z 395-23 Sy1 05 16 11.4092471904 -00 08 59.157166920   14.30 13.92     ~ 953 1
10 NGC 2110 Sy2 05 52 11.3768668776 -07 27 22.507465392   14.77 13.51 11.86   ~ 712 1
11 Z 232-3 Sy1 05 54 53.6080860768 +46 26 21.624853488   15.37 14.62     ~ 563 3
12 IRAS 05563-3820 Sy1 05 58 02.0566707456 -38 20 04.452162288   16.05 14.98 11.6   ~ 249 1
13 Z 235-30 Sy1 07 42 32.8210670808 +49 48 34.783809768   14.74 14.27     ~ 769 1
14 NGC 2992 Sy2 09 45 42.045 -14 19 34.90 13.54 13.14 12.18 12.6 12.2 ~ 951 3
15 NGC 3079 Sy2 10 01 57.8789863992 +55 40 47.449758324 11.57 11.54 10.86     ~ 1476 3
16 NGC 3227 Sy1 10 23 30.5765149296 +19 51 54.282206700   12.61 11.79     ~ 1807 2
17 NGC 3516 Sy1 11 06 47.4632200800 +72 34 07.298374656   13.12 12.40     ~ 1638 0
18 NGC 3783 Sy1 11 39 01.7096819040 -37 44 19.009642992   12.46 13.43 11.33 12.1 ~ 1765 1
19 NGC 4051 Sy1 12 03 09.6101337312 +44 31 52.682601288   11.08 12.92 9.94   ~ 2270 1
20 NGC 4151 Sy1 12 10 32.5759813872 +39 24 21.063527532   12.18 11.48     ~ 3938 2
21 NGC 4253 Sy1 12 18 26.5163572920 +29 48 46.531535472   14.34 13.57     ~ 1106 1
22 NGC 4388 Sy2 12 25 46.820 +12 39 43.45 11.91 11.76 11.02     ~ 1433 2
23 NGC 4593 Sy1 12 39 39.4435107024 -05 20 39.034988448   13.95 13.15     ~ 1179 0
24 Z 294-4 Sy1 12 56 14.2341182928 +56 52 25.238373852   14.68 13.84     ~ 2096 3
25 NGC 5033 Sy2 13 13 27.535 +36 35 37.14   11.01 12.03 9.73   ~ 909 1
26 MCG-06-30-015 Sy1 13 35 53.7691256160 -34 17 44.160716796   13.89 13.61 8.9   ~ 1559 0
27 NGC 5256 PaG 13 38 17.81 +48 16 41.2   14.1 13.42     ~ 449 1
28 NGC 5273 Sy1 13 42 08.3801616672 +35 39 15.467518836   14.01 13.12     ~ 510 0
29 IC 4329A Sy1 13 49 19.2601801224 -30 18 34.213815504   13.81 13.66 12.18 12.35 ~ 876 1
30 Z 336-28 Sy1 13 53 03.4348964112 +69 18 29.410910460   15.15 14.46     ~ 812 1
31 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1331 1
32 NGC 5506 Bla 14 13 14.8761010056 -03 12 27.556909272   15.25 14.38     ~ 1173 1
33 NGC 5548 Sy1 14 17 59.5400291832 +25 08 12.603122268   14.35 13.73     ~ 2895 0
34 Z 296-15 Sy1 14 36 22.0820611632 +58 47 39.394934844   14.19 13.79     ~ 592 0
35 Mrk 841 Sy1 15 04 01.1935384104 +10 26 15.780409692   14.50 14.27     ~ 701 0
36 NGC 5929 Sy1 15 26 06.1564333536 +41 40 14.384294616   13.0 14.00     ~ 450 0
37 NGC 5930 AGN 15 26 07.9964334517 +41 40 33.691556640   13.0       ~ 441 0
38 ESO 141-55 Sy1 19 21 14.1473895816 -58 40 12.982437480   14.36 13.64 13.28   ~ 394 0
39 Mrk 509 Sy1 20 44 09.7504483224 -10 43 24.727155528   13.35 13.12 10.7   ~ 1370 0
40 NGC 7172 Sy2 22 02 01.897 -31 52 11.60   12.72 13.61 11.15 25.10 ~ 572 2
41 NGC 7213 Bla 22 09 16.2100443720 -47 10 00.115999716   10.97 12.08 10.50 10.6 ~ 700 1
42 Z 404-28 Sy1 22 40 17.0609184456 +08 03 13.539839976   15.30 14.45     ~ 202 1
43 NGC 7469 Sy1 23 03 15.6 +08 52 26 12.60 13.00 12.34     ~ 2253 3
44 NGC 7582 Sy2 23 18 23.60 -42 22 13.3 11.62 10.92 10.62     ~ 978 3
45 NGC 7603 Sy1 23 18 56.6538277656 +00 14 37.977066096   14.73 14.01     ~ 438 0
46 NGC 7674 Sy1 23 27 56.6973043968 +08 46 44.253707772 13.84 13.92 13.23 12.64   ~ 738 2

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