Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published December 10, 2015 | Published + Submitted
Journal Article Open

Binary Active Galactic Nuclei in Stripe 82: Constraints on Synchronized Black Hole Accretion in Major Mergers


Representing simultaneous black hole accretion during a merger, binary active galactic nuclei (AGNs) could provide valuable observational constraints to models of galaxy mergers and AGN triggering. High-resolution radio interferometer imaging offers a promising method for identifying a large and uniform sample of binary AGNs because it probes a generic feature of nuclear activity and is free from dust obscuration. Our previous search yielded 52 strong candidates of kiloparsec-scale binaries over the 92 deg^2 of the Sloan Digital Sky Survey Stripe 82 area with 2"-resolution Very Large Array (VLA) images. Here we present 0."3-resolution VLA 6 GHz observations for six candidates that have complete optical spectroscopy. The new data confirm the binary nature of four candidates and identify the other two as line of sight projections of radio structures from single AGNs. The four binary AGNs at z ~ 0.1 reside in major mergers with projected separations of 4.2–12 kpc. Optical spectral modeling shows that their hosts have stellar masses between 10.3

Additional Information

© 2015 The American Astronomical Society. Received 2015 September 30; accepted 2015 November 19; published 2015 December 3. We thank Cornelia Liang, Robert Mutel, Steve Spangler, and Alan Stockton for helpful discussions and the referee for useful comments. H.F. was partially supported by NASA JPL award 1495624 and University of Iowa funds. A.D.M. was partially supported by NASA ADAP award NNX12AE38G and by NSF awards 1211112 and 1515404. S.G.D. acknowledges support from NSF award AST-1413600. The National Radio Astronomy Observatory is a facility of the National Science Foundation, operated under cooperative agreement by Associated Universities, Inc. Facilities: VLA, Sloan, UKIRT, Keck:I.

Attached Files

Submitted - 1511.03283v2.pdf

Published - Fu_2015pL6.pdf


Files (2.1 MB)
Name Size Download all
1.6 MB Preview Download
548.4 kB Preview Download

Additional details

August 22, 2023
August 22, 2023