Dual AGNs on 100 kpc Scales from the Million Quasar Catalog
Zhuojun Deng, Cheng Xiang, Qihang Chen, Liang Jing, Xingyu Zhu, and Jianghua Wu

TL;DR
This study identifies and analyzes 173 new low-redshift dual AGNs, triplets, and quadruplets within 100 kpc from the Million Quasars Catalog, revealing their demographics, tidal features, and separation distributions to enhance understanding of galaxy and black hole coevolution.
Contribution
The paper presents a new sample of low-redshift dual AGNs, triplets, and quadruplets, expanding existing catalogs and providing detailed analysis of their properties and interactions.
Findings
16% of pairs show tidal features
Number of dual AGNs increases at lower redshifts
Most pairs have velocity differences below 300 km/s
Abstract
Research on dual active galactic nuclei (AGNs) is crucial for understanding the coevolution of galaxies and supermassive black holes. However, the current number of dual AGNs remains scarce. In this work, we selected 173 new dual AGNs, 4 AGN triplets, and 1 AGN quadruplet from the Million Quasars Catalog, all with low redshift (), a projected distance () of no more than 100 kpc, and a line-of-sight velocity difference () of less than 600 km s, thus supplementing existing low-redshift dual AGNs demographics. Visual inspection of the optical images from the Dark Energy Spectroscopic Instrument Legacy Survey was performed for each pair, revealing that 16\% of pairs exhibit tidal features. Statistical analyses show an increasing number of dual AGNs with decreasing redshift, with velocity difference primarily at 300 km s, which is…
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Taxonomy
TopicsGalaxies: Formation, Evolution, Phenomena · Astronomy and Astrophysical Research · Space Technology and Applications
