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Detection of Two Massive CO Systems in 4C 41.17 at z = 3.8

Carlos De Breuck·Dennis Downes·Roberto Neri·Wil van Breugel·Michiel Reuland·Alain Omont·Rob Ivison
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Abstract

We have detected CO(4-3) in the z=3.8 radio galaxy 4C 41.17 with the IRAM Interferometer. The CO is in two massive (M_dyn ~ 6 x 10^10 M_Sun) systems separated by 1.8" (13 kpc), and by 400 km/s in velocity, which coincide with two different dark lanes in a deep Ly-alpha image. One CO component coincides with the cm-radio core of the radio galaxy, and its redshift is close to that of the HeII AGN line. The second CO component is near the base of a cone-shaped region southwest of the nucleus, which resembles the emission-line cones seen in nearby AGN and starburst galaxies. The characteristics of the CO sources and their mm/submm dust continuum are similar to those found in ultraluminous IR galaxies and in some high-z radio galaxies and quasars. The fact that 4C 41.17 contains two CO systems is further evidence for the role of mergers in the evolution of galaxies at high redshift.

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Carlos De Breuck, Dennis Downes, Roberto Neri, Wil van Breugel, Michiel Reuland, Alain Omont, Rob Ivison. 2004-11-26. Detection of Two Massive CO Systems in 4C 41.17 at z = 3.8. https://doi.org/10.1051/0004-6361%3A200400115

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