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    The ultraviolet-to-mid-infrared spectral energy distribution of weak emission line quasars

    251721.pdf (1.031Mb)
    Access Status
    Open access
    Authors
    Lane, R.
    Shemmer, O.
    Diamond-Stanic, A.
    Fan, X.
    Anderson, S.
    Brandt, W.
    Plotkin, Richard
    Richards, G.
    Schneider, D.
    Strauss, M.
    Date
    2011
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Lane, R. and Shemmer, O. and Diamond-Stanic, A. and Fan, X. and Anderson, S. and Brandt, W. and Plotkin, R. et al. 2011. The ultraviolet-to-mid-infrared spectral energy distribution of weak emission line quasars. Astrophysical Journal. 743: 163.
    Source Title
    Astrophysical Journal
    DOI
    10.1088/0004-637X/743/2/163
    ISSN
    0004-637X
    School
    Department of Physics and Astronomy
    Remarks

    Copyright © 2011 The American Astronomical Society. All rights reserved.

    URI
    http://hdl.handle.net/20.500.11937/52773
    Collection
    • Curtin Research Publications
    Abstract

    We present Spitzer Space Telescope photometry of 18 Sloan Digital Sky Survey (SDSS) quasars at 2.7 = z = 5.9 which have weak or undetectable high-ionization emission lines in their rest-frame ultraviolet (UV) spectra (hereafter weak-lined quasars, or WLQs). The Spitzer data are combined with SDSS spectra and ground-based, near-infrared (IR) photometry of these sources to produce a large inventory of spectral energy distributions (SEDs) of WLQs across the rest-frame 0.1-5 µm spectral band. The SEDs of our sources are inconsistent with those of BL Lacertae objects which are dominated by synchrotron emission due to a jetaligned close to our line of sight, but are consistent with the SED of ordinary quasars with similar luminosities and redshifts that exhibit a near-to-mid-IR "bump," characteristic of hot dust emission. This indicates that broad emission lines in WLQs are intrinsically weak, rather than suffering continuum dilution from a jet, and that such sources cannot be selected efficiently from traditional photometric surveys.

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