2009A&A...506..689I


Query : 2009A&A...506..689I

2009A&A...506..689I - Astronomy and Astrophysics, volume 506, 689-702 (2009/11-1)

CI and CO in nearby galaxy centers. The star-burst galaxies NGC 278, NGC 660, NGC 3628, NGC 4631, and NGC 4666.

ISRAEL F.P.

Abstract (from CDS):

We study the physical properties and mass 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 278, NGC 660, NGC 3628, NGC 4631, and NGC 4666, as well as 492GHz [CI] maps in three of these are used to model the molecular gas. All five objects contain bright CO emission in the central regions. Clear central concentrations were found in NGC 660, NGC 3628, and NGC 4666, but not in the weakest CO emitters NGC 278 and NGC 4631. In all cases, the observed lines could be modeled only with at least two distinct gas components. The physical condition of the molecular gas is found to differ from galaxy to galaxy. Relatively tenuous (density 100-1000cm–3) and high kinetic temperature (100-150K) gas occur in all galaxies, except perhaps NGC 3628, mixed with cooler (10-30K) and denser (0.3-1.0x104cm–3) gas. The CO-to-H2 conversion factor X is typically an order of magnitude less than the ``standard'' value in the Solar Neighborhood in all galaxy centers. The molecular gas is constrained within radii between 0.6 and 1.5kpc from the nuclei. Within these radii, H2 masses are typically 0.6-1.5x108M, which corresponds to no more than a few per cent of the dynamical mass in the same region.

Abstract Copyright:

Journal keyword(s): galaxies: ISM - submillimeter - galaxies: nuclei - galaxies: starburst - galaxies: spiral

Simbad objects: 30

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Number of rows : 30
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3177 2
2 NGC 278 H2G 00 52 04.3452013728 +47 33 01.675026036   10.5       ~ 227 1
3 UGC 731 G 01 10 44.00 +49 36 07.9   17       ~ 92 0
4 NAME NGC 628 Group GrG 01 36.7 +15 47           ~ 10 0
5 NGC 660 Sy2 01 43 02.350 +13 38 44.45   12.02 11.16     ~ 542 2
6 UGCA 39 GiG 02 41 55.092 +59 36 14.73   16       ~ 340 1
7 M 77 GiP 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4405 2
8 IC 342 SBG 03 46 48.514 +68 05 45.98   10.5       ~ 1463 1
9 NGC 2146 SBG 06 18 37.710 +78 21 25.27 11.67 11.38 10.59     ~ 676 2
10 ESO 495-21 bCG 08 36 15.190 -26 24 33.66 12.04 11.93 11.45 11.09 12.3 ~ 535 3
11 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5658 6
12 NGC 3079 Sy2 10 01 57.8789863992 +55 40 47.449758324 11.57 11.54 10.86     ~ 1337 3
13 M 65 GiP 11 18 55.9084654776 +13 05 32.300703672   9.6       ~ 431 1
14 NAME Leo Triplet IG 11 19 +13.2           ~ 117 1
15 M 66 GiP 11 20 15.026 +12 59 28.64 9.85 9.65 8.92     ~ 1290 4
16 NGC 3628 GiP 11 20 17.018 +13 35 22.16   10.42 9.48 9.22   ~ 796 3
17 NGC 4627 GiG 12 41 59.9679553813 +32 34 24.810713707 13.16 13.06 12.43     ~ 140 1
18 NGC 4631 GiP 12 42 08.009 +32 32 29.44   9.78 9.19 9.10   ~ 1045 2
19 NGC 4632 H2G 12 42 31.9886669016 -00 04 57.071456184   12.5   12.4 11.9 ~ 157 0
20 NGC 4656 GiP 12 43 57.6889089768 +32 10 13.345914504   10.96 10.52     ~ 346 3
21 NGC 4666 GiP 12 45 08.676 -00 27 42.88   11.7   11.5 10.7 ~ 368 1
22 NGC 4668 GiP 12 45 31.941 -00 32 02.36   13.5   12.714   ~ 116 0
23 M 64 SyG 12 56 43.696 +21 40 57.57   9.36 8.52     ~ 890 2
24 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1391 2
25 M 51 GiP 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4140 4
26 M 83 SBG 13 37 00.91920 -29 51 56.7400 8.85 8.11 7.52 7.21   ~ 2437 2
27 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2409 2
28 NGC 7331 LIN 22 37 04.0506038088 +34 24 56.800076508 10.65 10.35 9.48     ~ 1183 2
29 NGC 7469 Sy1 23 03 15.674 +08 52 25.28 12.60 13.00 12.34     ~ 2020 3
30 [CM69] NGC 4631 67 HII ~ ~           ~ 6 0

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2022.12.06-12:04:49

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