DUAL SUPERMASSIVE BLACK HOLE CANDIDATES IN THE AGN AND GALAXY EVOLUTION SURVEY

Dual supermassive black holes (SMBHs) with kiloparsec-scale separations in merger-remnant galaxies are informative tracers of galaxy evolution, but the avenue for identifying them in large numbers for such studies is not yet clear. Dual AGNs may produce double-peaked narrow AGN emission lines, while...

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Veröffentlicht in:	The Astrophysical journal 2013-11, Vol.777 (1), p.1-10
Hauptverfasser:	Comerford, Julia M, Schluns, Kyle, Greene, Jenny E, Cool, Richard J
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Sprache:	eng
Schlagworte:	Active galactic nuclei ASTRONOMY ASTROPHYSICS ASTROPHYSICS, COSMOLOGY AND ASTRONOMY BLACK HOLES Black holes (astronomy) COLOR COMPARATIVE EVALUATIONS Emission GALACTIC EVOLUTION GALAXIES GALAXY NUCLEI Line of sight Offsets RED SHIFT Searching VELOCITY
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creator	Comerford, Julia M Schluns, Kyle Greene, Jenny E Cool, Richard J
description	Dual supermassive black holes (SMBHs) with kiloparsec-scale separations in merger-remnant galaxies are informative tracers of galaxy evolution, but the avenue for identifying them in large numbers for such studies is not yet clear. Dual AGNs may produce double-peaked narrow AGN emission lines, while offset AGNs may produce single-peaked narrow AGN emission lines with line-of-sight velocity offsets relative to the host galaxy. We search for such dual and offset systems among 173 Type 2 AGNs at z < 0.37 in the AGN and Galaxy Evolution Survey (AGES), and we find two double-peaked AGNs and five offset AGN candidates. When we compare these results to a similar search of the DEEP2 Galaxy Redshift Survey and match the two samples in color, absolute magnitude, and minimum velocity offset, we find that the fraction of AGNs that are dual SMBH candidates increases from z = 0.25 to z = 0.7 by a factor of ~6 (from 2/70 to 16/91, or 2.9 super(+3.6) sub(-1.9)% to 18 super(+5) sub(-5)%).
doi_str_mv	10.1088/0004-637X/777/1/64
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subjects	Active galactic nuclei ASTRONOMY ASTROPHYSICS ASTROPHYSICS, COSMOLOGY AND ASTRONOMY BLACK HOLES Black holes (astronomy) COLOR COMPARATIVE EVALUATIONS Emission GALACTIC EVOLUTION GALAXIES GALAXY NUCLEI Line of sight Offsets RED SHIFT Searching VELOCITY
title	DUAL SUPERMASSIVE BLACK HOLE CANDIDATES IN THE AGN AND GALAXY EVOLUTION SURVEY
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