IDENTIFICATION OF OUTFLOWS AND CANDIDATE DUAL ACTIVE GALACTIC NUCLEI IN SDSS QUASARS AT z = 0.8-1.6

We present a sample of 131 quasars from the Sloan Digital Sky Survey at redshifts 0.8 < z < 1.6 with double peaks in either of the high-ionization narrow emission lines [NeV] [lambda]3426 or [NeIII] [lambda]3869. These sources were selected with the intention of identifying high-redshift analo...

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Veröffentlicht in:The Astrophysical journal 2013-06, Vol.769 (2), p.1-18
Hauptverfasser: Barrows, R Scott, Sandberg Lacy, Claud H, Kennefick, Julia, Comerford, Julia M, Kennefick, Daniel, Berrier, Joel C
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Sprache:eng
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Zusammenfassung:We present a sample of 131 quasars from the Sloan Digital Sky Survey at redshifts 0.8 < z < 1.6 with double peaks in either of the high-ionization narrow emission lines [NeV] [lambda]3426 or [NeIII] [lambda]3869. These sources were selected with the intention of identifying high-redshift analogs of the z < 0.8 active galactic nuclei (AGNs) with double-peaked [OIII] [lambda]5007 lines, which might represent AGN outflows or dual AGNs. Lines of high ionization potential are believed to originate in the inner, highly photo-ionized portion of the narrow line region, and we exploit this assumption to investigate the possible kinematic origins of the double-peaked lines. Finally, we find that our sample shows an anti-correlation between the velocity-offset ratio and luminosity ratio of the components, which is a potential dynamical argument for the presence of dual AGNs. Therefore, this study serves as a first attempt at extending the selection of candidate dual AGNs to higher redshifts.
ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/769/2/95