2002A&A...385.1022S


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.17CET07:20:01

2002A&A...385.1022S - Astronomy and Astrophysics, volume 385, 1022-1041 (2002/4-3)

Ice features in the mid-IR spectra of galactic nuclei.

SPOON H.W.W., KEANE J.V., TIELENS A.G.G.M., LUTZ D., MOORWOOD A.F.M. and LAURENT O.

Abstract (from CDS):

Mid infrared spectra provide a powerful probe of the conditions in dusty galactic nuclei. They variously contain emission features associated with star forming regions and absorptions by circumnuclear silicate dust plus ices in cold molecular cloud material. Here we report the detection of 6-8µm water ice absorption in 18 galaxies observed by ISO. While the mid-IR spectra of some of these galaxies show a strong resemblance to the heavily absorbed spectrum of NGC 4418, other galaxies in this sample also show weak to strong PAH emission. The 18 ice galaxies are part of a sample of 103 galaxies with good S/N mid-IR ISO spectra. Based on our sample we find that ice is present in most of the ULIRGs, whereas it is weak or absent in the large majority of Seyferts and starburst galaxies. This result is consistent with the presence of larger quantities of molecular material in ULIRGs as opposed to other galaxy types. Like NGC 4418, several of our ice galaxy spectra show a maximum near 8µm that is not or only partly due to PAH emission. While this affects only a small part of the galaxy population studied by ISO, it stresses the need for high S/N data and refined diagnostic methods, to properly discriminate spectra dominated by PAH emission and spectra dominated by heavy obscuration. The spectral variation from PAH emission to absorbed continuum emission near 8µm shows strong similarities with Galactic star forming clouds. This leads us to believe that our classification of ice galaxy spectra might reflect an evolutionary sequence from strongly obscured beginnings of star formation (and AGN activity) to a less enshrouded stage of advanced star formation (and AGN activity), as the PAHs get stronger and the broad 8µm feature weakens.

Abstract Copyright:

Journal keyword(s): galaxies: ISM - galaxies: nuclei - galaxies: Seyfert - galaxies: starburst - infrared: galaxies - infrared: ISM

Simbad objects: 38

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Number of rows : 38

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 Mrk 334 Sy1 00 03 09.6101278378 +21 57 36.952809317   15.30 14.62     ~ 183 0
2 NGC 23 G 00 09 53.411 +25 55 25.46   12.5       ~ 280 3
3 IRAS F00183-7111 Sy2 00 20 34.7 -70 55 27     20.6     ~ 121 0
4 2MASX J00212652-0839261 LIN 00 21 26.530 -08 39 26.15   18.37       ~ 94 1
5 QSO B0027-289 Sy1 00 30 04.2063799945 -28 42 25.819891932   16.4 16.0     ~ 74 0
6 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 2864 2
7 MCG+02-04-025 LIN 01 20 02.654 +14 21 41.73   14.9       ~ 129 0
8 NGC 520 IG 01 24 35.071 +03 47 32.68 12.41 12.24 11.42     ~ 480 3
9 NGC 613 AGN 01 34 18.235 -29 25 06.56   10.77 12.71 9.50 10.6 ~ 333 3
10 NGC 828 rG 02 10 09.5458704337 +39 11 25.220114583   13.0       ~ 149 1
11 W 3 MoC 02 27 04.10 +61 52 27.1           ~ 943 3
12 M 77 GiP 02 42 40.771 -00 00 47.84 9.70 9.61 8.87 10.1 9.9 ~ 3992 2
13 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1478 2
14 IRAS 04385-0828 Sy2 04 40 54.9609810827 -08 22 22.127946732   15.71 14.5     ~ 110 0
15 NGC 1808 Sy2 05 07 42.343 -37 30 46.98 11.05 10.80 9.94 9.36 10.2 ~ 633 3
16 2MASX J05210136-2521450 Sy2 05 21 01.3987198411 -25 21 45.269338983   15.47 14.75     ~ 420 0
17 UGC 3374 Sy1 05 54 53.6085733702 +46 26 21.625853190   15.37 14.62     ~ 447 2
18 2MASX J06025406-7103104 LIN 06 02 54.066 -71 03 10.48   15.6       ~ 76 1
19 2MASS J09134545+4056282 Sy2 09 13 45.4949162350 +40 56 28.214305677   19.69 19.21     ~ 230 2
20 UGC 5101 Sy1 09 35 51.694 +61 21 10.52   15.20 15.50     ~ 500 4
21 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5222 6
22 NGC 4355 Sy2 12 26 54.628 -00 52 39.51   14.21 13.37     ~ 388 2
23 Mrk 231 Sy1 12 56 14.2340989340 +56 52 25.238555193   14.68 13.84     ~ 1739 3
24 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1231 2
25 M 83 SBG 13 37 00.919 -29 51 56.74 8.85 8.11 7.52 7.21   ~ 2164 2
26 Mrk 273 Sy2 13 44 42.070 +55 53 13.17   15.68 14.91     ~ 814 3
27 Mrk 279 Sy1 13 53 03.4356451470 +69 18 29.410672989   15.15 14.46     ~ 675 0
28 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 969 2
29 2MASX J15265942+3558372 LIN 15 26 59.425 +35 58 37.23   15.61       ~ 243 1
30 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2625 4
31 6dFGS gJ172322.0-001701 LIN 17 23 21.943 -00 17 00.96   15.1       ~ 368 0
32 W 33a Y*O 18 14 39.0 -17 52 03           ~ 571 0
33 IC 5063 Sy2 20 52 02.329 -57 04 07.60   12.92 13.60 11.30   ~ 517 1
34 ESO 286-19 LIN 20 58 26.8182983654 -42 38 59.418569678   14.79 14.79 14.20   ~ 244 0
35 6dFGS gJ222209.3-315624 G 22 22 09.24 -31 56 24.2   19.57       ~ 9 0
36 [WBN74] NGC 7538 IRS 9 Y*O 23 14 01.63 +61 27 20.2           ~ 336 0
37 ESO 148-2 Sy2 23 15 46.772 -59 03 15.94   14.94 14.73 13.95   ~ 232 1
38 6dFGS gJ235533.0-210309 G 23 55 33.00 -21 03 08.7   19.04       ~ 15 0

    Equat.    Gal    SGal    Ecl

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2019.11.17-07:20:01

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