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    Double-Peaked Narrow-Line Active Galactic Nuclei. II. The Case Of Equal Peaks

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    2012_06_doublepeaked.pdf (151.8Kb)
    Date
    2012-06
    Author
    Smith, K. L.
    Shields, Gregory A.
    Salviander, Sarah
    Stevens, A. C.
    Rosario, D. J.
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    Abstract
    Active galactic nuclei (AGNs) with double-peaked narrow lines (DPAGNs) may be caused by kiloparsec-scale binary AGNs, bipolar outflows, or rotating gaseous disks. We examine the class of DPAGNs in which the two narrow-line components have closely similar intensity as being especially likely to involve disks or jets. Two spectroscopic indicators support this likelihood. For DPAGNs from Smith et al., the "equal-peaked" objects (EPAGNs) have [Ne V]/[O III] ratios lower than for a control sample of non-double-peaked AGNs. This is unexpected for a pair of normal AGNs in a galactic merger, but may be consistent with [O III] emission from a rotating ring with relatively little gas at small radii. Also, [O III]/H beta ratios of the redshifted and blueshifted systems in the EPAGN are more similar to each other than in a control sample, suggestive of a single ionizing source and inconsistent with the binary interpretation.
    Department
    Astronomy
    Subject
    galaxies: active
    quasars: general
    digital sky survey
    region kinematics
    black-holes
    galaxy
    spectra
    mergers
    search
    single
    agns
    astronomy & astrophysics
    URI
    http://hdl.handle.net/2152/35084
    Citation
    Smith, K. L., G. A. Shields, S. Salviander, A. C. Stevens, and D. J. Rosario. "Double-peaked Narrow-line Active Galactic Nuclei. II. The Case of Equal Peaks." The Astrophysical Journal, Vol. 752, No. 1 (Jun., 2012): 63.
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    • facebook
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    © The University of Texas at Austin