Revealing dual radio sources in a sub-kpc-scale binary active galactic nucleus candidate
In: Monthly Notices of the Royal Astronomical Society: Letters, Jg. 512 (2022), Heft 1, S. L27-L32
Online
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Zugriff:
We present new imaging of a sub-kpc-scale binary active galactic nucleus (AGN) candidate from the Karl G. Jansky Very Large Array (VLA) and the Multi-Element Radio Linked Interferometer Network (e-MERLIN). Two unresolved radio sources of similar luminosity around 1022 WHz−1 are identified in ∼35 h of e-MERLIN 6 cm imaging. These radio sources have an angular separation of 0.19 ± 0.06 arcsec and position angle (PA) of 22° ± 10°, corresponding to a projected separation of 0.95 ± 0.29 kpc at the epoch of the source. Our results suggest the presence of a kpc-scale active black hole pair hosted by two galaxies in the late stage of a merger at z = 0.35. This work follows Woo et al., which presented two optical sources with a similar separation and PA, and a velocity separation of 200 km s−1. Our target adds to the currently limited sample of close-separation binary AGNs, which will aid in understanding the frequency of mergers and the stochastic gravitational wave background.
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Revealing dual radio sources in a sub-kpc-scale binary active galactic nucleus candidate
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Autor/in / Beteiligte Person: | Brooks, J E ; Argo, M K ; Cho, Hojin ; Woo, Jong-Hak ; Jung, Taehyun ; Wrigley, N ; University of Manchester ; Science and Technology Facilities Council ; National Science Foundation |
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Zeitschrift: | Monthly Notices of the Royal Astronomical Society: Letters, Jg. 512 (2022), Heft 1, S. L27-L32 |
Veröffentlichung: | Oxford University Press (OUP), 2022 |
Medientyp: | academicJournal |
ISSN: | 1745-3925 |
DOI: | 10.1093/mnrasl/slac018 |
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