Crossing the Line: Active Galactic Nuclei in the Star-forming region of the BPT Diagram

In this work, we investigate the reliability of the BPT diagram for excluding galaxies that host an AGN. We determine the prevalence of X-ray AGN in the star-forming region of the BPT diagram and discuss the reasons behind this apparent misclassification, focusing primarily on relatively massive (\(...

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Bibliographic Details
Published in:arXiv.org 2019-03
Main Authors: Agostino, Christopher J, Salim, Samir
Format: Article
Language:English
Subjects:
Active galactic nuclei
Dilution
Emission
Galaxies
Linings
Red shift
Seyfert galaxies
Space telescopes
Star formation
X-rays
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Summary:In this work, we investigate the reliability of the BPT diagram for excluding galaxies that host an AGN. We determine the prevalence of X-ray AGN in the star-forming region of the BPT diagram and discuss the reasons behind this apparent misclassification, focusing primarily on relatively massive (\(\log(M_{*})\gtrsim10\)) galaxies. X-ray AGN are selected from deep XMM observations using a new method that results in greater samples with a wider range of X-ray luminosities, complete to \(\log(L_{X})>41\) for \(z
ISSN:2331-8422
DOI:10.48550/arxiv.1811.11755