Dual AGN Candidates with Double-peaked [O iii] Lines Matching that of Confirmed Dual AGNs

Kim, D.-C.; Yoon, Ilsang; Evans, A. S.; Kim, Minjin; Momjian, Emmanuel; Kim, Ji Hoon

doi:10.3847/1538-4357/abb9a0

Cited by 18 publications

(13 citation statements)

References 73 publications

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“…The corresponding observed rates are 0.4% and 0.8%. This is lower that the estimated lower-bound rate of physical dual (binary) AGNs of about 1% or greater in the literature (e.g., Kim et al 2020). Our estimates are expected to be underestimated due to the limited angular resolution capabilities of Gaia at small separations and faint magnitudes, where most of double AGNs are hidden.…”

Section: Near-neighbor Distance Analysiscontrasting

confidence: 67%

Quasars with Proper Motions and the Link to Double and Multiple AGNs

Макаров

Secrest

2022

ApJ

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Gaia used a large sample of photometrically selected active galactic nuclei (AGNs) and quasars to remove the residual spin of its global proper motion system in order to achieve a maximally inertial reference frame. A small fraction of these reference objects have statistically significant astrometric proper motions in Gaia EDR3. We compile a source sample of 105,593 high-fidelity AGNs with accurate spectroscopically determined redshifts above 0.5 from the SDSS and normalized proper motions below 4. The rate of genuinely perturbed proper motions is at least 0.17%. A smaller high completeness sample of 152 quasars with excess proper motions at a confidence level of 0.9995 is examined in detail. Pan-STARRS images and Gaia-resolved pairs reveal that 29% of the sample are either double sources or gravitationally lensed quasars. An Anderson–Darling test on parameters of a smaller high-reliability sample and their statistical controls reveals 17 significant factors that favor multiplicity and multi-source structure as the main cause of perturbed astrometry. Using a nearest-neighbor distance statistical analysis and counts of close companions in Gaia on a much larger initial sample of AGNs, an excess of closely separated sources in Gaia is detected. At least 0.33% of all optical quasars are genuinely double or multiply imaged. We provide a list of 44 candidate double or multiple AGNs and four previously known gravitational lenses. Many proper motion quasars may be more closely separated, unresolved doubles exhibiting the variability imposed motion effect, and a smaller fraction may be chance alignments with foreground stars causing weak gravitational lensing.

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Section: Near-neighbor Distance Analysiscontrasting

confidence: 67%

Quasars with Proper Motions and the Link to Double and Multiple AGNs

Макаров

Secrest

2022

ApJ

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“…Observationally, many dual AGN have been discovered serendipitously, but systematic searches have started addressing the statistical properties of dual AGN, both their occurrence and properties. Searches are generally of two types, either blind searches that search surveys for two AGN at small separation or in the same galaxy, for instance through spectroscopic signatures (Comerford et al 2013;Kim et al 2020;Hwang et al 2020), or assisted searches that look for companions near detected AGN (e.g., Koss et al 2012;Silverman et al 2020). After selection of candidates, additional tests are often needed to confirm the dual nature of the selected AGN (e.g., Rosario et al 2011;Rubinur et al 2019;Gabányi et al 2016;Foord et al 2020;Comerford et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Dual AGN in the Horizon-AGN simulation and their link to galaxy and massive black hole mergers, with an excursus on multiple AGN

Volonteri

Pfister

Beckmann

et al. 2022

Monthly Notices of the Royal Astronomical Society

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The occurrence of dual active galactic nuclei (AGN) on scales of a few tens of kpc can be used to study merger-induced accretion on massive black holes (MBHs) and to derive clues on MBH mergers, using dual AGN as a parent population of precursors. We investigate the properties of dual AGN in the cosmological simulation Horizon-AGN. We create catalogs of dual AGN selected with distance and luminosity criteria, plus sub-catalogs where further mass cuts are applied. We divide the sample into dual AGN hosted in different galaxies, on the way to a merger, and into those hosted in one galaxy, after the galaxy merger has happened. We find that the relation between MBH and galaxy mass is similar to that of general AGN population and we compare the properties of dual AGN also with a control sample, discussing differences and similarities in masses and Eddington ratios. The typical mass ratio of galaxy mergers associated to dual AGN is 0.2, with mass loss in the smaller galaxy decreasing the mass ratio as the merger progresses. Between 30 and 80 per cent of dual AGN with separations between 4 and 30 kpc can be matched to an ensuing MBH merger. The dual AGN fraction increases with redshift and with separation threshold, although above 50 kpc the increase of multiple AGN limits that of duals. Multiple AGN are generally associated with massive haloes, and mass loss of satellites shapes the galaxy-halo relation.

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“…Searches are generally of two types, either blind searches that search surveys for two AGN at small separation or in the same galaxy, for instance through spectroscopic signatures (Comerford et al 2013;Kim et al 2020;Hwang et al 2020), or assisted searches that look for companions near detected AGN (e.g., Koss et al 2012;Silverman et al 2020). After selection of candidates, additional tests are often needed to confirm the dual nature of the selected AGN (e.g., Rosario et al 2011;Rubinur et al 2019;Gabányi et al 2016;Foord et al 2020;Comerford et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Dual AGN in the Horizon-AGN simulation and their link to galaxy and massive black hole mergers, with an excursus on multiple AGN

Volonteri,

Pfister,

Beckmann

et al. 2021

Preprint

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The occurrence of dual active galactic nuclei (AGN) on scales of a few tens of kpc can be used to study merger-induced accretion on massive black holes (MBHs) and to derive clues on MBH mergers, using dual AGN as a parent population of precursors. We investigate the properties of dual AGN in the cosmological simulation H -AGN. We create catalogs of dual AGN selected with distance and luminosity criteria, plus sub-catalogs where further mass cuts are applied. We divide the sample into dual AGN hosted in different galaxies, on the way to a merger, and into those hosed in one galaxy, after the galaxy merger has happened. We find that the most luminous AGN in a pair has higher Eddington ratio and mass than the general AGN population, but that the relation between MBH and galaxy mass is similar to that of all AGN. The typical mass ratio of galaxy mergers associated to dual AGN is 0.2, with mass loss in the smaller galaxy decreasing the mass ratio as the merger progresses. The connection between dual AGN and MBH mergers is weaker. Between 30 and 80 per cent of dual AGN with separations between 4 and 30 kpc can be matched to an ensuing MBH merger. The dual AGN fraction increases with redshift and with separation threshold, although above 50 kpc the increase of multiple AGN limits that of duals. Multiple AGN are generally associated with massive halos, and mass loss of satellites shapes the galaxy-halo relation.

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Dual AGN Candidates with Double-peaked [O iii] Lines Matching that of Confirmed Dual AGNs

Cited by 18 publications

References 73 publications

Quasars with Proper Motions and the Link to Double and Multiple AGNs

Quasars with Proper Motions and the Link to Double and Multiple AGNs

Dual AGN in the Horizon-AGN simulation and their link to galaxy and massive black hole mergers, with an excursus on multiple AGN

Dual AGN in the Horizon-AGN simulation and their link to galaxy and massive black hole mergers, with an excursus on multiple AGN

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