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We report on the detection of the lowest CO J = 1 - 0 transition in thepowerful high-redshift radio galaxy 4C60.07 at z = 3.79. The CO emission isdistributed in two spatially and kinematically distinct components as waspreviously known from the observations of the higher excitation CO J = 4 - 3line. The total molecular gas mass in 4C60.07 inferred from the CO J = 1 - 0emission is M(H_2) = 1.3 x 10^11 M_sun, sufficient to fuel the inferredstar-formation rate of ~1600 M_sun yr^-1 for 10^8 yrs. From our high-resolutionCO J = 1 - 0 VLA maps we find the dynamical mass of 4C60.07 to be comparable tothat of a giant elliptical at the present time. A significant fraction of themass is in the form of molecular gas suggesting that 4C60.07 is in an earlystate of its evolution. The merging nature of 4C60.07 along with its largedynamical mass imply that this system is a giant elliptical caught in itsformative stages.Comment: 10 pages, 8 figures, Accepted for publication in Astronomy &  Astrophysic

Detection of CO J = 1–0 in the z = 3.79 radio galaxy 4C 60.07