2004A&A...426L...5L


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.26CET02:58:34

2004A&A...426L...5L - Astronomy and Astrophysics, volume 426, L5-8 (2004/10-4)

Gas near active galactic nuclei: A search for the 4.7 µm CO band.

LUTZ D., STURM E., GENZEL R., SPOON H.W.W. and STACEY G.J.

Abstract (from CDS):

In order to constrain the properties of dense and warm gas around active galactic nuclei, we have searched Infrared Space Observatory spectra of local active galactic nuclei (AGN) for the signature of the 4.7µm fundamental ro-vibrational band of carbon monoxide. Low resolution spectra of 31 AGN put upper limits on the presence of wide absorption bands corresponding to absorption by large columns of warm and dense gas against the nuclear dust continuum. High resolution (R∼2500) spectra of NGC1068 detect no significant absorption or emission in individual lines, to a 3σ limit of 7% of the continuum. The limits set on CO absorption in local AGN are much lower than the recent Spitzer Space Telescope detection of strong CO absorption by dense and warm gas in the obscured ultraluminous infrared galaxy IRAS F00183-7111, despite evidence for dense material on parsec scales near an AGN in both types of objects. This suggests that such deep absorptions are not intimately related to the obscuring ``torus'' material invoked in local AGN, but rather are a signature of the peculiar conditions in the circumnuclear region of highly obscured infrared galaxies like IRAS F00183-7111. They may reflect fully covered rather than torus geometries.

Abstract Copyright:

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

Simbad objects: 17

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Number of rows : 17

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 IRAS F00183-7111 Sy2 00 20 34.7 -70 55 27     20.6     ~ 123 0
2 M 77 GiP 02 42 40.771 -00 00 47.84 9.70 9.61 8.87 10.1 9.9 ~ 4176 2
3 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1561 2
4 Mrk 1095 Sy1 05 16 11.4093760763 -00 08 59.158774578   14.30 13.92     ~ 801 1
5 UGC 3374 Sy1 05 54 53.6085733702 +46 26 21.625853190   15.37 14.62     ~ 473 2
6 IC 450 Sy1 06 52 12.32333 +74 25 37.2376   15.16 14.19     ~ 513 1
7 NGC 3516 Sy1 11 06 47.4596406816 +72 34 07.189563769   13.12 12.40     ~ 1436 0
8 NGC 3783 Sy1 11 39 01.7095761008 -37 44 19.008597647   12.46 13.43 11.33 12.1 ~ 1500 0
9 NGC 4151 Sy1 12 10 32.5771747733 +39 24 21.057727323   12.18 11.48     ~ 3434 2
10 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1300 2
11 NAME Centaurus A Sy2 13 25 27.61509104 -43 01 08.8056025   8.18 6.84 6.66   ~ 4075 3
12 ESO 445-50 Sy1 13 49 19.2607281800 -30 18 34.224136831   13.81 13.66 12.18   ~ 741 0
13 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1037 2
14 NGC 5506 AGN 14 13 14.901 -03 12 27.22   15.25 14.38     ~ 1013 0
15 NGC 7213 Sy1 22 09 16.2106632887 -47 10 00.082166299   10.97 12.08 10.50 10.6 ~ 606 0
16 NGC 7469 Sy1 23 03 15.674 +08 52 25.28 12.60 13.00 12.34     ~ 1917 3
17 NGC 7582 GiP 23 18 23.621 -42 22 14.06 11.62 10.92 10.62     ~ 823 2

    Equat.    Gal    SGal    Ecl

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2021.02.26-02:58:34

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