Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-03-31
AIP Conf.Proc.1035:132-134,2008
Astronomy and Astrophysics
Astrophysics
3 pages and 2 figures. Conference of "The Evolution of Galaxies through the Neutral Hydrogen Window" February 1-3, 2008 Arecib
Scientific paper
10.1063/1.2973564
Powerful radio-AGN are hosted by massive elliptical galaxies which are usually very poor in molecular gas. Nevertheless the central Black Hole (BH) needs molecular gas for the nuclear activity. Thus it is important to study the origin, the distribution and the kinematics of the molecular gas in such objects. We have performed at the IRAM-30m telescope a survey of the CO(1-0) and CO(2-1) emission in the most powerful radio galaxies of the Local Universe, selected only on the basis of their radio continuum fluxes. The main result of that survey is the low content in molecular gas of such galaxies compared to Seyfert galaxies. The median value of the molecular gas mass is 4x10^8 Msun. Moreover, the CO spectra indicate the presence of a central molecular gas disk in some of these radio galaxies. We complemented this survey with photometric data of SPITZER and IRAS fluxes with the purpose to study the dust and its relation with the molecular gas and AGN.
Combes François
Dinh-V-Trung
Leon Stephane
Lim JaeDeok
Ocana-Flaquer B.
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