2002A&A...383...82I


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.05CET12:14:58

2002A&A...383...82I - Astronomy and Astrophysics, volume 383, 82-90 (2002/2-3)

Neutral atomic carbon in centers of galaxies.

ISRAEL F.P. and BAAS F.

Abstract (from CDS):

We present measurements of the emission from the centers of fifteen spiral galaxies in the 3P1-3P0[CI] fine-structure transition at 492 GHz. Observed galaxy centers range from quiescent to starburst to active. The intensities of neutral carbon, the J= 2-1 transition of 13CO and the J=4-3 transition of 12CO are compared in matched beams. Most galaxy centers emit more strongly in [CI] than in 13CO, completely unlike the situation pertaining to Galactic molecular cloud regions. [CI] intensities are lower than, but nevertheless comparable to J=4-3 12CO intensities, again rather different from Galactic sources. The ratio of [CI] to 13CO increases with the central [CI] luminosity of a galaxy; it is lowest for quiescent and mild starburst centers, and highest for strong starburst centers and active nuclei. Comparison with radiative transfer model calculations shows that most observed galaxy centers have neutral carbon abundances close to, or exceeding, carbon monoxide abundances, rather independent from the assumed model gas parameters. The same models suggest that the emission from neutral carbon and carbon monoxide, if assumed to originate in the same volumes, arises from a warm and dense gas rather than a hot and tenuous, or a cold and very dense gas. The observed [CI] intensities together with literature [CII] line and far-infrared continuum data likewise suggest that a significant fraction of the emission originates in medium-density gas (n=103-104cm–3), subjected to radiation fields of various strengths.

Abstract Copyright:

Journal keyword(s): galaxies: ISM - ISM: molecules - radio lines: galaxies

Simbad objects: 25

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Number of rows : 25

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 ~ 3001 2
2 NGC 278 H2G 00 52 04.3422973787 +47 33 01.649350749   10.5       ~ 221 1
3 NGC 660 Sy2 01 43 02.350 +13 38 44.45   12.02 11.16     ~ 518 2
4 NGC 891 H2G 02 22 32.907 +42 20 53.95 11.08 10.81 9.93 7.86   ~ 1550 2
5 UGCA 39 GiG 02 41 55.092 +59 36 14.73   16       ~ 328 1
6 M 77 GiP 02 42 40.771 -00 00 47.84 9.70 9.61 8.87 10.1 9.9 ~ 4180 2
7 IC 342 SBG 03 46 48.514 +68 05 45.98   10.5       ~ 1407 1
8 TMC-1 MoC 04 41 45.9 +25 41 27           ~ 1399 0
9 LHA 120-N 159 HII 05 39 46.650 -69 45 39.94           ~ 254 2
10 LHA 120-N 160 EmO 05 39 47.9 -69 37 08           ~ 111 1
11 2MASS J05400074-6947129 Y*O 05 40 00.741 -69 47 12.91 14.808 15.690 15.072   14.336 ~ 32 0
12 LHA 120-N 159S MoC 05 40 03.750 -69 51 01.62           ~ 42 0
13 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5429 6
14 NGC 3079 Sy2 10 01 57.80342 +55 40 47.2428 11.57 11.54 10.86     ~ 1280 3
15 NGC 3628 GiP 11 20 17.018 +13 35 22.16   10.42 9.48 9.22   ~ 765 3
16 ICRF J120234.2-052802 Sy1 12 02 34.2246246247 -05 28 02.490603371   16.4 18.0 16.6   ~ 63 1
17 M 64 SyG 12 56 43.696 +21 40 57.57   9.36 8.52     ~ 834 2
18 M 51 GiP 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 3893 4
19 M 83 SBG 13 37 00.919 -29 51 56.74 8.85 8.11 7.52 7.21   ~ 2280 2
20 NGC 5713 GiP 14 40 11.528 -00 17 21.16 11.88 11.84 11.20     ~ 356 2
21 LDN 183 MoC 15 54 12.2 -02 49 42           ~ 698 1
22 [W69] C Rad 20 01 54.2 +33 34 15           ~ 15 0
23 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2296 2
24 IC 5146 OpC 21 53 24 +47 16.0           ~ 398 2
25 NGC 7331 LIN 22 37 04.102 +34 24 57.31 10.65 10.35 9.48     ~ 1130 2

    Equat.    Gal    SGal    Ecl

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2021.03.05-12:14:58

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