2009A&A...493..525I


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.08CET20:42:53

2009A&A...493..525I - Astronomy and Astrophysics, volume 493, 525-538 (2009/1-2)

CI and CO in nearby galaxy centers. The bright galaxies NGC 1068 (M 77), NGC 2146, NGC 3079, NGC 4826 (M 64), and NGC 7469.

ISRAEL F.P.

Abstract (from CDS):

We study the physical properties and amount of molecular gas in the central regions of galaxies with active nuclei. Maps and measurements of the J=1-0, J=2-1, J=3-2, J=4-3 12CO, the J=1-0, J=2-1, and J=3-2 13CO lines in the central arcminute squared of NGC 1068, NGC 2146, NGC 3079, NGC 4826, and NGC 7469, as well as 492GHz CI maps in three of these are used to model the molecular gas clouds in these galaxies. Bright CO concentrations were detected and mapped in all five objects. In all cases, the observed lines could be fitted with two distinct gas components. The physical condition of the molecular gas is found to differ from galaxy to galaxy. Rather high kinetic temperatures of 125-150K occur in NGC 2146 and NGC 3079. Very high densities of 0.3-1.0x105cm–3 occur in NGC 2146, NGC 3079, and NGC 7469. The CO to hard H2 conversion factor X is typically an order of magnitude less than the ``standard'' value in the solar neighborhood. The molecular gas is constrained within radii between 0.9 and 1.5kpc from the nuclei. Within these radii, hard H2 masses are typically 1.2-2.5x108M. The exception is the (relatively nearby) merger NGC 4826 with R=0.3kpc, and M=3x107M. The hard H2 mass is typically about one per cent of the dynamical mass in the same region.

Abstract Copyright:

Journal keyword(s): radiative transfer - ISM: molecules - galaxies: general - galaxies: ISM - galaxies: nuclei - radio lines: galaxies

Simbad objects: 18

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Number of rows : 18

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 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3002 2
2 UGCA 39 GiG 02 41 55.092 +59 36 14.73   16       ~ 328 1
3 M 77 GiP 02 42 40.771 -00 00 47.84 9.70 9.61 8.87 10.1 9.9 ~ 4180 2
4 IC 342 SBG 03 46 48.514 +68 05 45.98   10.5       ~ 1407 1
5 NGC 2146 SBG 06 18 37.710 +78 21 25.27 11.67 11.38 10.59     ~ 640 2
6 ESO 495-21 bCG 08 36 15.190 -26 24 33.66 12.04 11.93 11.45 11.09 12.3 ~ 513 3
7 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5431 6
8 NGC 3079 Sy2 10 01 57.80342 +55 40 47.2428 11.57 11.54 10.86     ~ 1280 3
9 NAME CVn I Group GrG 12 32 48.3 +33 57 07           ~ 135 0
10 M 64 SyG 12 56 43.696 +21 40 57.57   9.36 8.52     ~ 835 2
11 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1302 2
12 M 51 GiP 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 3895 4
13 M 83 SBG 13 37 00.919 -29 51 56.74 8.85 8.11 7.52 7.21   ~ 2280 2
14 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2296 2
15 NGC 7331 LIN 22 37 04.102 +34 24 57.31 10.65 10.35 9.48     ~ 1130 2
16 NGC 7469 Sy1 23 03 15.674 +08 52 25.28 12.60 13.00 12.34     ~ 1919 3
17 APG 298 PaG 23 03 16.87 +08 53 01.8   12.4       ~ 28 0
18 IC 5283 GiP 23 03 17.996 +08 53 37.13   15.2       ~ 108 1

    Equat.    Gal    SGal    Ecl

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2021.03.08-20:42:53

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