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Powerful radio-AGN are hosted by massive elliptical galaxies which areusually very poor in molecular gas. Nevertheless gas is needed in the verycenter to feed the nuclear activity. We aim to study the molecular gasproperties (mass, kinematics, distribution, origin) in such objects, and tocompare them with results of other known samples. We have performed at theIRAM-30m telescope a survey of the CO(1-0) and CO(2-1) emission in the mostpowerful radio galaxies of the Local Universe, selected only on the basis oftheir radio continuum fluxes. The main result of our survey is the very lowcontent in molecular gas of such galaxies compared to spiral or FIR-selectedgalaxies. The median value of the molecular gas mass, including detections andupper limits, is 2.2x10^8 Msun. If separated into FR-I and FR-II types, adifference in H_2 masses between them is found. The median value of FR-Igalaxies is about 1.9x10^8 and higher for FR-II galaxies, about 4.5x10^8 Msunbut this is very probably entirely due to a Malmquist bias. Our resultscontrast with previous surveys, mainly selected through the FIR emission,implying larger observed masses of molecular gas. Moreover, the shape of COspectra suggest the presence of a central molecular gas disk in 30% of theseradio galaxies, a lower rate than in other active galaxy samples.

TANGO I: ISM in nearby radio galaxies. Molecular gas