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    AEGIS: Infrared Spectroscopy of an Infrared-luminous Lyman Break Galaxy at z = 3.01

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    Issue Date
    2007-05-01
    Author
    Huang, J. S.
    Rigopoulou, D.
    Papovich, Casey J.
    Ashby, M. L. N.
    Willner, S. P.
    Ivison, R. J.
    Laird, E. S.
    Webb, T. M. A.
    Wilson, Graham Wallace
    Barmby, P.
    Chapman, S. C.
    Conselice, C. J.
    McLeod, B.
    Shu, C.
    Smith, H. A.
    Le Floc'h, E.
    Egami, E.
    Willmer, C. A. N.
    Fazio, G. G.
    Publisher
    American Astronomical Society
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Metadata
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    Abstract
    We report the detection of rest-frame 6.2 and 7.7 μm emission features arising from polycyclic aromatic hydrocarbons (PAHs) in the Spitzer IRS spectrum of an infrared-luminous Lyman break galaxy at z = 3.01. This is currently the highest redshift galaxy where these PAH emission features have been detected. The total IR luminosity inferred from the MIPS 24 μm and radio flux density is 2 × 1013 L☉, which qualifies this object as a so-called hyperluminous infrared galaxy (HyLIRG). However, unlike local HyLIRGs, which are generally associated with QSO/AGNs and have weak or absent PAH emission features, this HyLIRG has very strong 6.2 and 7.7 μm PAH emission. We argue that intense star formation dominates the IR emission of this source, although we cannot rule out the presence of a deeply obscured AGN. This LBG appears to be a distorted system in the HST ACS F606W and F814W images, possibly indicating that a significant merger or interaction is driving the large IR luminosity.
    Description
    This is the publisher's version, also available electronically from http://iopscience.iop.org/1538-4357/660/1/L69/.
    URI
    http://hdl.handle.net/1808/17702
    DOI
    https://doi.org/10.1086/508567
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    • Physics and Astronomy Scholarly Works [1404]
    Citation
    Huang, J.-S. et al. (2007). "AEGIS: Infrared Spectroscopy of an Infrared-luminous Lyman Break Galaxy at z = 3.01." The Astrophysical Journal Letters, 660(1):L69-L72. http://www.dx.doi.org/10.1086/508567.

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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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