2007A&A...468L..57D


Query : 2007A&A...468L..57D

2007A&A...468L..57D - Astronomy and Astrophysics, volume 468, L57-61 (2007/6-4)

Black hole in the West nucleus of Arp 220.

DOWNES D. and ECKART A.

Abstract (from CDS):

We present new observations with the IRAM Interferometer, in its longest-baseline configuration, of the CO(2-1) line and the 1.3mm dust radiation from the Arp 220 nuclear region. The dust source in the West nucleus has a size of 0.19''x0.13'' and a 1.3mm brightness temperature of 90K. This implies that the dust ring in the West nucleus has a high opacity, with τ=1 at 1.1mm. Not only is the dust ring itself optically thick in the submm and far-IR, but it is surrounded by the previously-known, rapidly rotating molecular disk of size 0.5'' that is also optically thick in the mid-IR. The molecular ring is cooler than the hot dust disk because the CO(2-1) line is seen in absorption against the dust disk. The dust ring is massive (109M), compact (radius 35pc), and hot (true dust temperature 170K). It resembles rather strikingly the dust ring detected around the quasar APM 08279+52, and is most unlike the warm, extended dust sources in starburst galaxies. Because there is a strong temperature gradient from the hot dust ring to the cooler molecular disk, the heating must come from a concentrated source, an AGN accretion disk that is completely invisible at optical wavelengths, and heavily obscured in hard X-rays.

Abstract Copyright:

Journal keyword(s): galaxies: nuclei - galaxies: kinematics and dynamics - galaxies: ISM - galaxies: individual: Arp 220

Simbad objects: 15

goto Full paper

goto View the references in ADS

Number of rows : 15
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 QSO J0831+5245 QSO 08 31 41.7108197808 +52 45 17.616994560   19.2   14.5 13.9 ~ 520 1
2 ICRF J092703.0+390220 Sy1 09 27 03.01394144 +39 02 20.8518067   17.17 17.00 16.486   ~ 969 1
3 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5657 6
4 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 5616 1
5 Mrk 231 Sy1 12 56 14.2341182928 +56 52 25.238373852   14.68 13.84     ~ 1920 3
6 QSO B1502+1041 Bla 15 04 24.97978391 +10 29 39.1985309   18.97 18.56 18.94   ~ 525 1
7 [LDT2006] W42 SNR 15 34 57.21230 +23 30 11.4820           ~ 10 0
8 APG 220A PoG 15 34 57.22 +23 30 11.4           ~ 54 1
9 [LDT2006] W33 Rad 15 34 57.2200 +23 30 11.491           ~ 9 0
10 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2859 4
11 [LDT2006] W17 SNR 15 34 57.2241 +23 30 11.519           ~ 10 0
12 [LDT2006] W10 SNR 15 34 57.2307 +23 30 11.502           ~ 8 0
13 3C 345 QSO 16 42 58.80997043 +39 48 36.9939552   16.81 16.59 16.84   ~ 1650 2
14 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 4005 3
15 [BH95] C Rad ~ ~           ~ 5 0

To bookmark this query, right click on this link: simbad:objects in 2007A&A...468L..57D and select 'bookmark this link' or equivalent in the popup menu


2022.11.30-11:49:26

© Université de Strasbourg/CNRS

    • Contact