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Fading AGN candidates: AGN histories and outflow signatures

Abstract:

We consider the energy budgets and radiative history of eight fading active galactic nuclei (AGNs), identified from an energy shortfall between the requirements to ionize very extended (radius > 10 kpc) ionized clouds and the luminosity of the nucleus as we view it directly. All show evidence of significant fading on timescales of ≈50,000 yr. We explore the use of minimum ionizing luminosity Q ion derived from photoionization balance in the brightest pixels in Hα at each projected radius...

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Publication status:
Published
Peer review status:
Peer reviewed
Version:
Accepted manuscript

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Publisher copy:
10.3847/1538-4357/835/2/256

Authors


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ORCID:
0000-0002-6131-9539
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Institution:
University of Oxford
Division:
MPLS Division
Department:
Physics; Astrophysics
Oxford college:
Mansfield College
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ORCID:
0000-0002-2203-7889
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ORCID:
0000-0003-2064-0518
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ORCID:
0000-0001-9984-0891
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National Aeronautics and Space Administration More from this funder
President of the Russian Federation More from this funder
Ministry of Education and Science of the Russian Federation More from this funder
Leverhulme Trust More from this funder
Science and Technology Facilities Council More from this funder
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Publisher:
Institute of Physics Publisher's website
Journal:
Astrophysical Journal Journal website
Volume:
835
Issue:
2
Pages:
256
Publication date:
2017-02-05
Acceptance date:
2016-12-18
DOI:
EISSN:
1538-4357
ISSN:
0004-637X
Pubs id:
pubs:667734
URN:
uri:8d7260c1-acb6-4b9c-ae8d-c01733083ae0
UUID:
uuid:8d7260c1-acb6-4b9c-ae8d-c01733083ae0
Local pid:
pubs:667734

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