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    AEGIS20: A Radio Survey of the Extended Groth Strip

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    WilsonG_AJL_660(1)L77.pdf (141.5Kb)
    Issue Date
    2007-05-01
    Author
    Wilson, Graham Wallace
    Ivison, R. J.
    Chapman, S. C.
    Faber, S. M.
    Smail, Ian
    Biggs, A. D.
    Conselice, C. J.
    Salim, S.
    Huang, J. S.
    Willner, S. P.
    Publisher
    American Astronomical Society
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
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    Abstract
    We describe AEGIS20—a radio survey of the Extended Groth Strip (EGS) conducted with the Very Large Array (VLA) at 1.4 GHz. The resulting catalog contains 1123 emitters and is sensitive to ultraluminous (1012 L☉) starbursts to z ≤ 1.3, well matched to the redshift range of the DEEP2 spectroscopic survey in this region. We use stacking techniques to explore the microjansky-level emission from a variety of galaxy populations selected via conventional criteria—Lyman break galaxies (LBGs), distant red galaxies (DRGs), UV-selected galaxies, and extremely red objects (EROs)—determining their properties as a function of color, magnitude, and redshift and their extinction-free contributions to the history of star formation. We confirm the familiar pattern that the star formation rate (SFR) density, ρsstarf, increases by at least a factor of ~5 from z = 0 to 1, although we note highly discrepant UV- and radio-based SFR estimates. Our radio-based SFRs become more difficult to interpret at z > 1 where correcting for contamination by radio-loud active galactic nuclei (AGNs) comes at the price of rejecting luminous starbursts. While stacking radio images is a useful technique, accurate radio-based SFRs for z Gt 1 galaxies require precise redshifts and extraordinarily high fidelity radio data to identify and remove accretion-related emission.
    Description
    This is the published version, also available here: http://dx.doi.org/10.1086/517917.
    URI
    http://hdl.handle.net/1808/17533
    DOI
    https://doi.org/10.1086/517917
    Collections
    • Physics & Astronomy Scholarly Works [1711]
    Citation
    R. J. Ivison et al. "AEGIS20: A Radio Survey of the Extended Groth Strip." Astrophysical Journal Letters. (2007) ApJ 660 L77 http://dx.doi.org/10.1086/517917.

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    KU Libraries
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    Lawrence, KS 66045
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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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