Journal article

An AMUSING look at the host of the periodic nuclear transient ASASSN-14ko reveals a second AGN

MA Tucker, BJ Shappee, JT Hinkle, JMM Neustadt, M Eracleous, CS Kochanek, JL Prieto, AV Payne, L Galbany, JP Anderson, K Auchettl, C Auge, Thomas W-S Holoien

Monthly Notices of the Royal Astronomical Society | Oxford University Press (OUP) | Published : 2021

Abstract

ABSTRACT We present Multi-Unit Spectroscopic Explorer (MUSE) integral-field spectroscopy of ESO 253−G003, which hosts a known active galactic nucleus (AGN) and the periodic nuclear transient ASASSN-14ko, observed as part of the All-weather MUse Supernova Integral-field of Nearby Galaxies survey. The MUSE observations reveal that the inner region hosts two AGN separated by $1.4\pm 0.1~\rm {kpc}$ (≈1${_{.}^{\prime\prime}}$7). The brighter nucleus has asymmetric broad permitted emission-line profiles and is associated with the archival AGN designation. The fainter nucleus does not have a broad emission-line component but exhibits other AGN characteristics, includi..

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