Halo ejection in distant radio galaxies: Jet feedback in massive galaxy formation

Michael A. Dopita*, Michiel Reuland, Wil Van Breugel, Wim De Vries, S. A. Stanford, Huub Röttgering, George Miley, Bram Venemans, Hy Spinrad, Steve Dawson, Arjun Dey, Mark Lacy, Daniel Stern, Andrew Bunker

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)


    We present results from a Keck optical and near IR spectroscopic study of the giant emission line halos of the z>3 High Redshift Radio Galaxies (HiZRGs) 4C 41.17, 4C 60.07 and B2 0902+34. The outer regions of these halos show quiet kinematics with typical velocity dispersions of a few hundred km∈s-1 and velocity shears consistent with rotation. The inner regions contain shocked, clumpy cocoons of gas closely associated with the radio lobes with disturbed kinematics and expansion velocities and/or velocity dispersions >1000 km∈s-1. We also find evidence for the ejection of chemically enriched material in 4C 41.17 up to a distance of 60 kpc along the radio-axis. We infer that these HiZRGs are undergoing a final jet-induced phase of star formation with the ejection of most of their interstellar medium before evolving to become "red and dead" Elliptical galaxies.

    Original languageEnglish
    Pages (from-to)305-309
    Number of pages5
    JournalAstrophysics and Space Science
    Issue number1-3
    Publication statusPublished - Oct 2007


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