The Origin of Double-peaked Narrow Lines in Active Galactic Nuclei. IV. Association with Galaxy Mergers

Double-peaked narrow emission lines in active galactic nucleus (AGN) spectra can be produced by AGN outflows, rotation, or dual AGNs, which are AGN pairs in ongoing galaxy mergers. Consequently, double-peaked narrow AGN emission lines are useful tracers of the coevolution of galaxies and their super...

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Bibliographic Details
Published in:The Astrophysical journal 2018-11, Vol.867 (1), p.66
Main Authors: Comerford, Julia M., Nevin, Rebecca, Stemo, Aaron, Müller-Sánchez, Francisco, Barrows, R. Scott, Cooper, Michael C., Newman, Jeffrey A.
Format: Article
Language:English
Subjects:
Active galactic nuclei
Active galaxies
Astrophysics
Black holes
Emission analysis
Emission lines
Galactic rotation
Galaxies
galaxies: active
galaxies: interactions
galaxies: nuclei
Galaxy mergers & collisions
Outflow
Sky surveys (astronomy)
Stars & galaxies
Supermassive black holes
Tracers
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Summary:Double-peaked narrow emission lines in active galactic nucleus (AGN) spectra can be produced by AGN outflows, rotation, or dual AGNs, which are AGN pairs in ongoing galaxy mergers. Consequently, double-peaked narrow AGN emission lines are useful tracers of the coevolution of galaxies and their supermassive black holes, as driven by AGN feedback and AGN fueling. We investigate this concept further with follow-up optical longslit observations of a sample of 95 Sloan Digital Sky Survey (SDSS) galaxies that have double-peaked narrow AGN emission lines. Based on a kinematic analysis of the longslit spectra, we confirm previous work that finds that the majority of double-peaked narrow AGN emission lines are associated with outflows. We also find that eight of the galaxies have companion galaxies with line-of-sight velocity separations
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/aae2b4