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    Rapid coeval black hole and host galaxy growth in MRC1138-262: The hungry spider

    Access Status
    Open access via publisher
    Authors
    Seymour, Nick
    Altieri, B.
    De Breuck, C.
    Barthel, P.
    Coia, D.
    Conversi, L.
    Dannerbauer, H.
    Dey, A.
    Dickinson, M.
    Drouart, G.
    Galametz, A.
    Greve, T.
    Haas, M.
    Hatch, N.
    Ibar, E.
    Ivison, R.
    Jarvis, M.
    Kovács, A.
    Kurk, J.
    Lehnert, M.
    Miley, G.
    Nesvadba, N.
    Rawlings, J.
    Rettura, A.
    Röttgering, H.
    Rocca-Volmerange, B.
    Sánchez-Portal, M.
    Santos, J.
    Stern, D.
    Stevens, J.
    Valtchanov, I.
    Vernet, J.
    Wylezalek, D.
    Date
    2012
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Seymour, N. and Altieri, B. and De Breuck, C. and Barthel, P. and Coia, D. and Conversi, L. and Dannerbauer, H. et al. 2012. Rapid coeval black hole and host galaxy growth in MRC1138-262: The hungry spider. Astrophysical Journal. 755 (2).
    Source Title
    Astrophysical Journal
    DOI
    10.1088/0004-637X/755/2/146
    ISSN
    0004-637X
    School
    Department of Physics and Astronomy
    URI
    http://hdl.handle.net/20.500.11937/43788
    Collection
    • Curtin Research Publications
    Abstract

    We present a detailed study of the infrared spectral energy distribution of the high-redshift radio galaxy MRC1138-26 at z = 2.156, also known as the Spiderweb Galaxy. By combining photometry from Spitzer, Herschel, and LABOCA we fit the rest-frame 5-300 µm emission using a two-component, starburst, and active galactic nucleus (AGN) model. The total infrared (8-1000 µm) luminosity of this galaxy is (1.97 ± 0.28) ×1013 L ? with (1.17 ± 0.27) and (0.79 ± 0.09) ×1013 L ? due to the AGN and starburst components, respectively. The high derived AGN accretion rate of 20% Eddington and the measured star formation rate (SFR) of 1390 ± 150 M ?yr-1 suggest that this massive system is in a special phase of rapid central black hole and host galaxy growth, likely caused by a gas-rich merger in a dense environment. The accretion rate is sufficient to power both the jets and the previously observed large outflow. The high SFR and strong outflow suggest that this galaxy could potentially exhaust its fuel for stellar growth in a few tens of Myr, although the likely merger of the radio galaxy with nearby satellites suggests that bursts of star formation may recur again on timescales of several hundreds of Myr. The age of the radio lobes implies the jet started after the current burst of star formation, and therefore we are possibly witnessing the transition from a merger-induced starburst phase to a radio-loud AGN phase. We also note tentative evidence for [C II]158 µm emission. This paper marks the first results from the Herschel Galaxy Evolution Project (Project HeRGÉ), a systematic study of the evolutionary state of 71 high-redshift, 1 < z < 5.2, radio galaxies. © 2012. The American Astronomical Society. All rights reserved.

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