Merger-driven fueling of active galactic nuclei: Six dual and of AGNs discovered with Chandra and Hubble Space Telescope observations

Comerford, Julia M.; Pooley, David; Barrows, R. Scott; Greene, Jenny E.; Zakamska, Nadia L.; Madejski, Greg M.; Cooper, Michael C.

doi:10.1088/0004-637X/806/2/219

Title: Merger-driven fueling of active galactic nuclei: Six dual and of AGNs discovered with Chandra and Hubble Space Telescope observations

Journal Article · Fri Jun 19 00:00:00 EDT 2015 · The Astrophysical Journal (Online)

DOI:https://doi.org/10.1088/0004-637X/806/2/219· OSTI ID:1313952

Comerford, Julia M. ^[1]; Pooley, David ^[2]; Barrows, R. Scott ^[1]; Greene, Jenny E. ^[3]; Zakamska, Nadia L. ^[4]; Madejski, Greg M. ^[5]; Cooper, Michael C. ^[6]

Univ. of Colorado, Boulder, CO (United States)
Sam Houston State Univ., Huntsville, TX (United States); Eureka Scientific, Inc., Oakland, CA (United States)
Princeton Univ., Princeton, NJ (United States)
Johns Hopkins Univ., Baltimore, MD (United States)
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Univ. of California, Irvine, CA (United States)

Dual active galactic nuclei (AGNs) and offset AGNs are kpc-scale separation supermassive black holes pairs created during galaxy mergers, where both or one of the black holes are AGNs, respectively. These dual and offset AGNs are valuable probes of the link between mergers and AGNs but are challenging to identify. Here we present Chandra/ACIS observations of 12 optically selected dual AGN candidates at $$z\lt 0.34$$, where we use the X-rays to identify AGNs. We also present Hubble Space Telescope/Wide Field Camera 3 observations of 10 of these candidates, which reveal any stellar bulges accompanying the AGNs. We discover a dual AGN system with separation $${\rm \Delta }x=2.2$$ kpc, where the two stellar bulges have coincident [O iii] λ5007 and X-ray sources. This system is an extremely minor merger (460:1) that may include a dwarf galaxy hosting an intermediate mass black hole. We also find six single AGNs, and five systems that are either dual or offset AGNs with separations $${\rm \Delta }x\lt 10$$ kpc. Four of the six dual AGNs and dual/offset AGNs are in ongoing major mergers, and these AGNs are 10 times more luminous, on average, than the single AGNs in our sample. This hints that major mergers may preferentially trigger higher luminosity AGNs. Further, we find that confirmed dual AGNs have hard X-ray luminosities that are half of those of single AGNs at fixed [O III] λ5007 luminosity, on average. Lastly, this could be explained by high densities of gas funneled to galaxy centers during mergers, and emphasizes the need for deeper X-ray observations of dual AGN candidates.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: National Aeronautics and Space Administration (NASA); USDOE Office of Science (SC)

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1313952

Report Number(s):: SLAC-PUB-16790; arXiv:1504.01391

Journal Information:: The Astrophysical Journal (Online), Vol. 806, Issue 2; ISSN 1538-4357

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 127 works

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Binary Active Galactic Nuclei in Stripe 82: Constraints on Synchronized Black Hole Accretion in Major Mergers Fu, Hai; Wrobel, J. M.; Myers, A. D. arXiv https://doi.org/10.48550/arxiv.1511.03283	text	January 2015
Discovery of a dual active galactic nucleus with ~ 8 kpc separation Ellison, Sara L.; Secrest, Nathan J.; Mendel, J. Trevor arXiv https://doi.org/10.48550/arxiv.1705.05465	text	January 2017
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Imaging Spectroscopy of Ionized Gaseous Nebulae around Optically Faint AGN at Redshift z ~ 2 Law, David R.; Steidel, Charles C.; Chen, Yuguang arXiv https://doi.org/10.48550/arxiv.1809.04089	text	January 2018
Constraining Sub-Parsec Binary Supermassive Black Holes in Quasars with Multi-Epoch Spectroscopy. III. Candidates from Continued Radial Velocity Tests Guo, Hengxiao; Liu, Xin; Shen, Yue arXiv https://doi.org/10.48550/arxiv.1809.04610	text	January 2018
Double-peaked Narrow Emission-line Galaxies in LAMOST Survey Wang, M. X.; Luo, A. L.; Song, Y. H. arXiv https://doi.org/10.48550/arxiv.1810.07387	text	January 2018
Revealing the differences in the SMBH accretion rate distributions of starburst and non-starburst galaxies Grimmett, L. P.; Mullaney, J. R.; Jin, S. arXiv https://doi.org/10.48550/arxiv.1904.08406	text	January 2019
Buried Black Hole Growth in IR-selected Mergers: New Results from Chandra Pfeifle, Ryan W.; Satyapal, Shobita; Secrest, Nathan J. arXiv https://doi.org/10.48550/arxiv.1904.10955	text	January 2019
Active Galactic Nucleus Pairs from the Sloan Digital Sky Survey. III. Chandra X-ray Observations Unveil Obscured Double Nuclei Hou, Meicun; Liu, Xin; Guo, Hengxiao arXiv https://doi.org/10.48550/arxiv.1904.12998	text	January 2019
X-ray Properties of Radio-Selected Dual Active Galactic Nuclei Gross, Arran C.; Fu, Hai; Myers, A. D. arXiv https://doi.org/10.48550/arxiv.1905.02733	text	January 2019
Spectral Energy Distributions of Candidate Periodically-Variable Quasars: Testing the Binary Black Hole Hypothesis Guo, Hengxiao; Liu, Xin; Tayyaba, Zafar arXiv https://doi.org/10.48550/arxiv.1907.06676	text	January 2019
A Triple AGN in a Mid-Infrared Selected Late Stage Galaxy Merger Pfeifle, Ryan W.; Satyapal, Shobita; Manzano-King, Christina arXiv https://doi.org/10.48550/arxiv.1908.01732	text	January 2019

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