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Title:
Halo ejection in distant radio galaxies: jet feedback in massive galaxy formation
Authors:
Dopita, Michael A.; Reuland, Michiel; van Breugel, Wil; de Vries, Wim; Stanford, S. A.; Röttgering, Huub; Miley, George; Venemans, Bram; Spinrad, Hy; Dawson, Steve; Dey, Arjun; Lacy, Mark; Stern, Daniel; Bunker, Andrew
Affiliation:
AA(Research School of Astronomy and Astrophysics, ANU), AB(Sterrewacht Leiden; Institute of Geophysics and Planetary Physics, LLNL), AC(Institute of Geophysics and Planetary Physics, LLNL; , University California at Merced), AD(Institute of Geophysics and Planetary Physics, LLNL), AE(Institute of Geophysics and Planetary Physics, LLNL; Physics Dept., University California at Davis), AF(Sterrewacht Leiden), AG(Sterrewacht Leiden), AH(Sterrewacht Leiden), AI(Department of Astronomy, University California at Berkeley), AJ(Department of Astronomy, University California at Berkeley), AK(University California at Merced), AL(SIRTF Science Center, Caltech), AM(JPL, California Institute of Technology), AN(IOA, Cambridge University)
Publication:
Astrophysics and Space Science, Volume 311, Issue 1-3, pp. 305-309 (Ap&SS Homepage)
Publication Date:
10/2007
Origin:
SPRINGER
Keywords:
Galaxies: active, Galaxies: formation, Galaxies: high-redshift, Galaxies: individual (4C&nbsp, 41.17, 4C&nbsp, 60.07, B2&nbsp, 0902+34), Quasars: emission lines
Abstract Copyright:
(c) 2007: Springer Science+Business Media B.V.
DOI:
10.1007/s10509-007-9538-0
Bibliographic Code:
2007Ap&SS.311..305D

Abstract

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.
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