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The quasar feedback survey: discovering hidden Radio-AGN and their connection to the host galaxy ionized gas

Jarvis, ME; Harrison, CM; Mainieri, V; Alexander, DM; Arrigoni Battaia, F; Calistro Rivera, G; Circosta, C; Costa, T; De Breuck, C; Edge, AC; Girdhar, A; Kakkad, D; Kharb, P; Lansbury, GB; Molyneux, SJ; Mukherjee, D; Mullaney, JR; Farina, EP; S, Silpa; Thomson, AP; Ward, SR

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ME Jarvis

CM Harrison

V Mainieri

DM Alexander

F Arrigoni Battaia

G Calistro Rivera

C Circosta

T Costa

C De Breuck

A Girdhar

D Kakkad

P Kharb

GB Lansbury

SJ Molyneux

D Mukherjee

JR Mullaney

EP Farina

Silpa S

AP Thomson

SR Ward


We present the first results from the Quasar Feedback Survey, a sample of 42 z < 0.2, [O III] luminous AGNs ( L[O III] > 1042.1 ergs s−1) with moderate radio luminosities (i.e. L1.4GHz > 1023.4 W Hz−1; median L1.4GHz = 5.9 × 1023 W Hz−1). Using high spatial resolution (∼0.3–1 arcsec), 1.5–6 GHz radio images from the Very Large Array, we find that 67 per cent of the sample have spatially extended radio features on ∼1–60 kpc scales. The radio sizes and morphologies suggest that these may be lower radio luminosity versions of compact, radio-loud AGNs. By combining the radio-to-infrared excess parameter, spectral index, radio morphology, and brightness temperature, we find radio emission in at least 57 per cent of the sample that is associated with AGN-related processes (e.g. jets, quasar-driven winds, or coronal emission). This is despite only 9.5–21 per cent being classified as radio-loud using traditional criteria. The origin of the radio emission in the remainder of the sample is unclear. We find that both the established anticorrelation between radio size and the width of the [O III] line, and the known trend for the most [O III] luminous AGNs to be associated with spatially extended radio emission, also hold for our sample of moderate radio luminosity quasars. These observations add to the growing evidence of a connection between the radio emission and ionized gas in quasar host galaxies. This work lays the foundation for deeper investigations into the drivers and impact of feedback in this unique sample.


Jarvis, M., Harrison, C., Mainieri, V., Alexander, D., Arrigoni Battaia, F., Calistro Rivera, G., …Ward, S. (2021). The quasar feedback survey: discovering hidden Radio-AGN and their connection to the host galaxy ionized gas. Monthly Notices of the Royal Astronomical Society, 503(2), 1780-1797.

Journal Article Type Article
Acceptance Date Feb 21, 2021
Online Publication Date Mar 5, 2021
Publication Date 2021-05
Deposit Date Oct 27, 2021
Publicly Available Date Nov 16, 2021
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 503
Issue 2
Pages 1780-1797
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Published Journal Article (4.5 Mb)

Copyright Statement
This article has been accepted for publication in Monthly notices of the Royal Astronomical Society. ©: 2021 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

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