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    Extremely Red Objects in the Lockman Hole

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    WilsonG_AJS_154(1)107.pdf (116.2Kb)
    Issue Date
    2004-05-21
    Author
    Wilson, Graham Wallace
    Huang, J. S.
    Pérez-González, P. G.
    Egami, E.
    Ivison, R. J.
    Rigby, J. R.
    Alonso-Herrero, A.
    Barmby, P.
    Dole, H.
    Fazio, G. G.
    Le Floc'h, E.
    Papovich, Casey J.
    Rigaopoulou, D.
    Bai, L.
    Engelbracht, C. W.
    Frayer, D. T.
    Gordon, K. D.
    Hines, D. C.
    Misselt, K. A.
    Miyazaki, S.
    Morrison, J. E.
    Rieke, G. H.
    Rieke, M. J.
    Surace, J.
    Publisher
    American Astronomical Society
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Metadata
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    Abstract
    We investigate extremely red objects (EROs) using near- and mid-infrared observations in five passbands (3.6 to 24 μm) obtained from the Spitzer Space Telescope, and deep ground-based R and K imaging. The great sensitivity of the Infrared Array Camera (IRAC) camera allows us to detect 64 EROs (a surface density of 2.90 ± 0.36 arcmin-2; [3.6]AB < 23.7) in only 12 minutes of IRAC exposure time, by means of an R - [3.6] color cut (analogous to the traditional red R - K cut). A pure infrared K - [3.6] red cut detects a somewhat different population and may be more effective at selecting z > 1.3 EROs. We find ~17% of all galaxies detected by IRAC at 3.6 or 4.5 μm to be EROs. These percentages rise to about 40% at 5.8 μm, and about 60% at 8.0 μm. We utilize the spectral bump at 1.6 μm to divide the EROs into broad redshift slices using only near-infrared colors (2.2/3.6/4.5 μm). We conclude that two-thirds of all EROs lie at redshift z > 1.3. Detections at 24 μm imply that at least 11% of 0.6 < z < 1.3 EROs and at least 22% of z > 1.3 EROs are dusty star-forming galaxies.
    Description
    This is the published version, also available here: http://dx.doi.org/10.1086/422716.
    URI
    http://hdl.handle.net/1808/17518
    DOI
    https://doi.org/10.1086/422716
    Collections
    • Physics & Astronomy Scholarly Works [1713]
    Citation
    G. Wilson et al. "Extremely Red Objects in the Lockman Hole." (2004) ApJS. 154. 107 http://dx.doi.org/10.1086/422716.

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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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