Investigating the Candidate Displaced Active Galactic Nucleus in NGC 3115

The nearby galaxy NGC 3115 contains a known radio-emitting, low-luminosity active galactic nucleus (AGN), and was recently claimed to host a candidate AGN displaced 14.3 pc from the galaxy's optical photocenter. Our goal is to understand whether this represents a single offset AGN, an AGN in or...

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Bibliographic Details
Published in:arXiv.org 2019-02
Main Authors: Jones, Megan L, Burke-Spolaor, Sarah, Nyland, Kristina, Wrobel, Joan M
Format: Article
Language:English
Subjects:
Active galactic nuclei
Galactic bulge
Galaxies
Luminosity
Radio astronomy
Radio sources (astronomy)
Online Access:Get full text
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Summary:The nearby galaxy NGC 3115 contains a known radio-emitting, low-luminosity active galactic nucleus (AGN), and was recently claimed to host a candidate AGN displaced 14.3 pc from the galaxy's optical photocenter. Our goal is to understand whether this represents a single offset AGN, an AGN in orbit around a central black hole, or something else. We present a new, sensitive (RMS = 4.4 \(\mu\)Jy beam\(^{-1}\)) 10 GHz image, which finds evidence for only one AGN. We place a stringent limit on the radio luminosity of any secondary supermassive black hole of \(L_{10~\rm{GHz}}
ISSN:2331-8422