[O iii] emitters in the field of the MRC 0316–257 protocluster
Corresponding Author
F. Maschietto
Leiden Observatory, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, the Netherlands
E-mail: [email protected]Search for more papers by this authorN. A. Hatch
Leiden Observatory, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, the Netherlands
Search for more papers by this authorB. P. Venemans
Institute of Astronomy, Madingley Road, Cambridge CB3 OAH
Search for more papers by this authorH. J. A. Röttgering
Leiden Observatory, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, the Netherlands
Search for more papers by this authorG. K. Miley
Leiden Observatory, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, the Netherlands
Search for more papers by this authorR. A. Overzier
Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, D-85741 Garching, Germany
Search for more papers by this authorM. A. Dopita
Research School of Astronomy & Astrophysics, Australian National University, Cotter Rd., Weston Creek, ACT 2611, Australia
Search for more papers by this authorP. R. Eisenhardt
Jet Propulsion Laboratory, California Institute of Technology, MS169-327, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
Search for more papers by this authorJ. D. Kurk
Max-Planck-Institut für Astronomie, D-69117 Heidelberg, Germany
Search for more papers by this authorG. R. Meurer
Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218, USA
Search for more papers by this authorL. Pentericci
INAF–Osservatorio Astronomico di Roma, via Frascati 33, 00040 Monteporzio, Italy
Search for more papers by this authorP. Rosati
European Southern Observatory, Karl-Schwarzschild-Strasse 2, D-85748 Garching, Germany
Search for more papers by this authorS. A. Stanford
University of California, Davis, CA 95616, USA
Institute of Geophysics and Planetary Physics, Lawrence Livermore National Laboratory, Livermore, CA 94551, USA
Search for more papers by this authorW. Van Breugel
Institute of Geophysics and Planetary Physics, Lawrence Livermore National Laboratory, Livermore, CA 94551, USA
University of California, Merced, PO Box 2039, Merced, CA 95344, USA
Search for more papers by this authorA. W. Zirm
Leiden Observatory, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, the Netherlands
Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218, USA
Search for more papers by this authorCorresponding Author
F. Maschietto
Leiden Observatory, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, the Netherlands
E-mail: [email protected]Search for more papers by this authorN. A. Hatch
Leiden Observatory, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, the Netherlands
Search for more papers by this authorB. P. Venemans
Institute of Astronomy, Madingley Road, Cambridge CB3 OAH
Search for more papers by this authorH. J. A. Röttgering
Leiden Observatory, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, the Netherlands
Search for more papers by this authorG. K. Miley
Leiden Observatory, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, the Netherlands
Search for more papers by this authorR. A. Overzier
Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, D-85741 Garching, Germany
Search for more papers by this authorM. A. Dopita
Research School of Astronomy & Astrophysics, Australian National University, Cotter Rd., Weston Creek, ACT 2611, Australia
Search for more papers by this authorP. R. Eisenhardt
Jet Propulsion Laboratory, California Institute of Technology, MS169-327, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
Search for more papers by this authorJ. D. Kurk
Max-Planck-Institut für Astronomie, D-69117 Heidelberg, Germany
Search for more papers by this authorG. R. Meurer
Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218, USA
Search for more papers by this authorL. Pentericci
INAF–Osservatorio Astronomico di Roma, via Frascati 33, 00040 Monteporzio, Italy
Search for more papers by this authorP. Rosati
European Southern Observatory, Karl-Schwarzschild-Strasse 2, D-85748 Garching, Germany
Search for more papers by this authorS. A. Stanford
University of California, Davis, CA 95616, USA
Institute of Geophysics and Planetary Physics, Lawrence Livermore National Laboratory, Livermore, CA 94551, USA
Search for more papers by this authorW. Van Breugel
Institute of Geophysics and Planetary Physics, Lawrence Livermore National Laboratory, Livermore, CA 94551, USA
University of California, Merced, PO Box 2039, Merced, CA 95344, USA
Search for more papers by this authorA. W. Zirm
Leiden Observatory, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, the Netherlands
Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218, USA
Search for more papers by this authorABSTRACT
Venemans et al. found evidence for an overdensity of Lyα emission-line galaxies associated with the radio galaxy MRC 0316−257 at z= 3.13 indicating the presence of a massive protocluster. Here, we present the results of a search for additional star-forming galaxies and active galactic nucleus (AGN) within the protocluster. Narrow-band infrared imaging was used to select candidate [O iii] emitters in a 1.1 × 1.1 Mpc2 region around the radio galaxy. 13 candidates have been detected. Four of these are among the previously confirmed sample of Lyα galaxies, and an additional three have been confirmed through follow-up infrared spectroscopy. The three newly confirmed objects lie within a few hundred km s−1 of each other, but are blueshifted with respect to the radio galaxy and Lyα emitters by ∼2100 km s−1. Although the sample is currently small, our results indicate that the radio-selected protocluster is forming at the centre of a larger, ∼60 comoving Mpc superstructure. On the basis of a Hubble Space Telescope/Advanced Camera for Surveys (HST/ACS) imaging study we calculate dust-corrected star formation rates and investigate morphologies and sizes of the [O iii] candidate emitters. From a comparison of the star formation rate derived from UV continuum and [O iii] emission, we conclude that at least two of the [O iii] galaxies harbour an AGN which ionized the O+ gas.
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