2007A&A...476.1235D


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.07CET04:12:02

2007A&A...476.1235D - Astronomy and Astrophysics, volume 476, 1235-1242 (2007/12-4)

Carbonaceous dust grains in luminous infrared galaxies. Spitzer/IRS reveals a-C:H as an abundant and ubiquitous ISM component.

DARTOIS E. and MUNOZ-CARO G.M.

Abstract (from CDS):

The available ground- and space-based spectroscopic capabilities of observatories now allow us to extend Galactic interstellar medium composition studies to extragalactic cases. Absorptions in the mid-infrared shows evidence for silicate and carbonaceous grains in other galaxies. A set of extragalactic spectra of luminous infrared galaxies (LIRGs) has been extracted from the Spitzer database and compared to the spectra of laboratory-produced interstellar carbon dust analogues. These highly obscured lines-of-sight display the characteristic absorptions at ∼6.85 and 7.25µm of the CH3/CH2 deformation modes of hydrogenated amorphous carbon (a-C:H) grains. They are compared to laboratory-produced a-C:H and imply carbon atom column densities in the solid phase exceeding ∼1018cm–2. These observations further demonstrate the ubiquitousness of a-C:H in the diffuse interstellar medium (DISM) of galaxies, for a long time almost only observed in the Milky-Way ISM lines-of-sights. Whereas PAH emission lines trace the re-processing of energetic young stellar radiation, the observed a-C:H features underline the existence of large masses of amorphous carbon dust in (extra-)galactic dust budgets. The difficulty in observing such an interstellar component in the mid-infrared is linked to its low absorption contrast (AV/τ(6.85)≃625±40) for the strongest band, which therefore requires high column densities to detect a-C:H grains. Such carbon grains might be present but spectroscopically hidden in many other galactic environments.

Abstract Copyright:

Journal keyword(s): ISM: dust, extinction - galaxies: ISM - methods: laboratory

CDS comments: Table 1 : IRAS 16156+014 is a misprint for IRAS F16156+0146

Simbad objects: 66

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Number of rows : 66

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 6dFGS gJ001143.3-072207 H2G 00 11 43.305 -07 22 07.37   18.41       ~ 49 0
2 IRAS F00183-7111 Sy2 00 20 34.7 -70 55 27     20.6     ~ 123 0
3 2MASX J00212652-0839261 LIN 00 21 26.530 -08 39 26.15   18.37       ~ 95 1
4 6dFGS gJ004215.5-125604 H2G 00 42 15.54 -12 56 03.0   19.45       ~ 61 0
5 IRAS 00406-3127 Sy2 00 43 03.17 -31 10 49.5   19.97       ~ 25 0
6 IRAS 01003-2238 Sy2 01 02 49.9936617393 -22 21 57.258147027   18.62 18.9 17.83   ~ 139 0
7 6dFGS gJ011907.7-082910 H2G 01 19 07.568 -08 29 09.56   18.54       ~ 44 1
8 IRAS 01199-2307 H2G 01 22 20.884 -22 52 05.62   18.04     17.33 ~ 44 0
9 6dFGS gJ013221.4-072908 H2G 01 32 21.41 -07 29 08.5   19.04       ~ 55 0
10 2MASX J01591372-2924356 Sy1 01 59 13.725 -29 24 35.61   18.18 18.20     ~ 43 1
11 M 77 GiP 02 42 40.771 -00 00 47.84 9.70 9.61 8.87 10.1 9.9 ~ 4180 2
12 2MASX J02553438+0223417 G 02 55 34.390 +02 23 41.73   16.62       ~ 25 0
13 IRAS 03158+4227 G 03 19 11.97216 +42 38 25.5264           ~ 50 0
14 2MASX J03191239+4238436 Sy2 03 19 12.3906153026 +42 38 43.519057826           ~ 43 0
15 NGC 1377 GiG 03 36 39.077 -20 54 08.14   13.38   12.12   ~ 197 0
16 6dFGS gJ043337.1-164331 LIN 04 33 37.05 -16 43 31.5   19.80   18.54   ~ 33 0
17 IRAS 04385-0828 Sy2 04 40 54.9609810827 -08 22 22.127946732   15.71 14.5     ~ 111 0
18 ESO 203-1 IG 04 46 49.501 -48 33 30.36   16.40   15.51   ~ 58 0
19 2MASX J05210136-2521450 Sy2 05 21 01.3987198411 -25 21 45.269338983   15.47 14.75     ~ 438 0
20 2MASX J06025406-7103104 LIN 06 02 54.066 -71 03 10.48   15.6       ~ 77 1
21 2MASX J06210118-6317238 Sy2 06 21 01.188 -63 17 23.81   16.70   15.27   ~ 56 1
22 IRAS 06301-7934 G 06 26 41.7 -79 36 32   19.01   17.57   ~ 19 0
23 IRAS 06361-6217 LIN 06 36 35.8 -62 20 32     17.84     ~ 32 0
24 2MASX J07273754-0254540 G 07 27 37.5366759821 -02 54 54.258142847           ~ 42 0
25 NAME IRAS F08572+3915 NW LIN 09 00 25.364 +39 03 54.23     16.66     ~ 370 1
26 UGC 5101 Sy1 09 35 51.599 +61 21 11.33   15.20 15.50     ~ 517 4
27 LEDA 2816688 LIN 09 56 34.3 +08 43 06       20.90   ~ 53 0
28 NGC 3094 G 10 01 25.917 +15 46 11.77   13.5       ~ 104 0
29 LEDA 165552 LIN 10 12 16.4 +46 49 42       22.20   ~ 35 0
30 2MASX J10402919+1053178 Sy1 10 40 29.1643651576 +10 53 18.203045589   17.79 17.18     ~ 85 0
31 LEDA 32516 LIN 10 51 03.67 -15 03 19.8           ~ 40 0
32 2dFGRS TGN232Z018 LIN 11 12 03.4 -02 54 23   17.45 17.40     ~ 84 1
33 2MASX J11531422+1314276 H2G 11 53 14.226 +13 14 27.86   17.77       ~ 55 0
34 LEDA 1888605 LIN 12 00 46.836 +30 04 14.19           ~ 30 0
35 [VV2000] J120425.2+192504 Sy2 12 04 24.5418289462 +19 25 09.752818918   16.63 19.16     ~ 72 0
36 2MASX J12054771+1651085 LIN 12 05 47.714 +16 51 08.50   18.758   17.327   ~ 54 0
37 NGC 4355 Sy2 12 26 54.628 -00 52 39.51   14.21 13.37     ~ 420 2
38 6dFGS gJ123831.6-074226 LIN 12 38 31.60 -07 42 25.5   19.40   18.23   ~ 26 1
39 2XMM J125400.8+101112 Sy2 12 54 00.8204 +10 11 12.550   19.03 18.27     ~ 46 0
40 Mrk 231 Sy1 12 56 14.2340989340 +56 52 25.238555193   14.68 13.84     ~ 1818 3
41 Mrk 273 Sy2 13 44 42.164 +55 53 13.53   15.68 14.91     ~ 835 3
42 Mrk 463 Sy2 13 56 02.9 +18 22 18   14.8 14.22     ~ 356 2
43 LEDA 165630 Sy2 14 09 31.257 +05 11 31.31     17.00     ~ 66 0
44 NGC 5506 AGN 14 13 14.901 -03 12 27.22   15.25 14.38     ~ 1013 0
45 2MASX J14373831-1500239 Sy1 14 37 38.317 -15 00 23.97   16.58 16.40     ~ 247 1
46 2MASX J15244389+2340099 H2G 15 24 43.890 +23 40 09.91           ~ 44 0
47 2MASX J15265942+3558372 LIN 15 26 59.442 +35 58 37.01   15.61       ~ 248 1
48 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2727 4
49 2MASX J16114042-0147062 LIN 16 11 40.4278789850 -01 47 06.559720269   16.6       ~ 67 0
50 LEDA 2817004 Sy2 16 18 09.4114 +01 39 20.951           ~ 34 1
51 LEDA 165690 LIN 16 32 21.378 +15 51 45.50   18.72 18.06     ~ 52 1
52 [KVS2002] IRAS 16468+5200 E PoG 16 48 01.65 +51 55 44.3           ~ 5 0
53 LEDA 2817027 LIN 16 48 01.70 +51 55 44.4           ~ 31 0
54 2MASX J17042850+6716277 LIN 17 04 28.506 +67 16 27.78     17.0     ~ 49 0
55 LEDA 165718 H2G 17 08 32.12 +40 23 28.2           ~ 39 0
56 6dFGS gJ172322.0-001701 LIN 17 23 21.943 -00 17 00.96   15.1       ~ 377 0
57 GAL 000.0+00.0 gam 17 45 39.60213 -29 00 22.0000           ~ 12014 0
58 LEDA 90308 G 18 42 54.8 +74 36 21           ~ 23 0
59 [VV2000] J201329.8-414735 QSO 20 13 29.509 -41 47 35.48   17.0       ~ 108 2
60 ESO 286-19 LIN 20 58 26.8182983654 -42 38 59.418569678   14.79 14.79 14.20   ~ 253 0
61 LEDA 2817285 Sy2 21 29 29.4 +25 27 53           ~ 28 0
62 NGC 7172 Sy2 22 02 01.897 -31 52 11.60   12.72 13.61 11.15   ~ 480 1
63 NGC 7479 Sy2 23 04 56.668 +12 19 22.36 11.74 11.60 10.85 10.47 9.66 ~ 682 2
64 IRAS 23129+2548 LIN 23 15 21.3 +26 04 32           ~ 43 0
65 2MASX J23260362-6910185 LIN 23 26 03.625 -69 10 18.58   16.6       ~ 39 0
66 NGC 7674 Sy2 23 27 56.6974755223 +08 46 44.238278540 13.84 13.92 13.23 12.64   ~ 648 4

    Equat.    Gal    SGal    Ecl

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2021.03.07-04:12:02

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