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Spatially Resolved Spectroscopy to Confirm or Disprove Dual Active Galactic Nuclei

Published online by Cambridge University Press:  25 July 2014

Rosalie C. McGurk ,
Claire E. Max ,
Anne Medling  and
Gregory A. Shields
Rosalie C. McGurk
Affiliation:
Astronomy Department and UCO-Lick Observatory, University of California, Santa Cruz, CA 95064, USA, Postbus 80000, NL-3508TA, Utrecht, the Netherlands email: [email protected], [email protected]
Claire E. Max
Affiliation:
Astronomy Department and UCO-Lick Observatory, University of California, Santa Cruz, CA 95064, USA, Postbus 80000, NL-3508TA, Utrecht, the Netherlands email: [email protected], [email protected]
Anne Medling
Affiliation:
Research School of Astronomy and Astrophysics, Australian National University, Mount Stromlo Observatory, Cotter Road, Weston Creek, ACT 2611, Australia email: [email protected]
Gregory A. Shields
Affiliation:
Astronomy Department, University of Texas, Austin, TX 78712, USA; email: [email protected]
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Abstract

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When galaxies merge, gas accretes onto both central supermassive black holes. Thus, one expects to see dual active galactic nuclei (AGNs) in a fraction of galaxy mergers. Candidates for galaxies containing dual AGNs have been identified by the presence of double-peaked narrow [O III] emission lines and by high spatial resolution images of close galaxy pairs. 30% of double-peaked narrow [OIII] emission line SDSS AGNs have two spatial components within a 3″ radius. However, spatially resolved spectroscopy is needed to confirm these galaxy pairs as systems with double AGNs. With the Keck 2 Laser Guide Star Adaptive Optics system and the OSIRIS near-infrared integral field spectrograph, we obtained spatially resolved spectra for SDSS J095207.62+255257.2, confirming that it contains a Type 1 and a Type 2 AGN separated by 4.8 kpc (=1.0″). We performed similar integral field and long-slit spectroscopy observations of more spatially separated candidate dual AGNs and will report on the varied results. By assessing what fraction of radio-quiet double-peaked emission line SDSS AGNs are true dual AGNs, we can better constrain the statistics of dual AGNs and characterize physical conditions throughout these interacting AGNs.

Keywords

galaxies: activegalaxies: interactions(galaxies:) quasars: emission linesgalaxies: nuclei
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S304: Multiwavelength AGN Surveys and Studies , October 2013 , pp. 371 - 374
Copyright
Copyright © International Astronomical Union 2014 

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