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Prevalence of radio jets associated with galactic outflows and feedback from quasars

Jarvis, ME; Harrison, CM; Thomson, AP; Circosta, C; Mainieri, V; Alexander, DM; Edge, AC; Lansbury, GB; Molyneux, SJ; Mullaney, JR

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Authors

ME Jarvis

CM Harrison

AP Thomson

C Circosta

V Mainieri

GB Lansbury

SJ Molyneux

JR Mullaney



Abstract

We present 1–7 GHz high-resolution radio imaging (VLA and e-MERLIN) and spatially resolved ionized gas kinematics for 10 z < 0.2 type 2 ‘obscured’ quasars (log [LAGN/erg s−1] 45) with moderate radio luminosities (log[L1.4 GHz/W Hz−1] = 23.3–24.4). These targets were selected to have known ionized outflows based on broad [O III] emission-line components (full width at half-maximum≈800–1800 km s−1). Although ‘radio-quiet’ and not ‘radioAGN’ by many traditional criteria, we show that for nine of the targets, star formation likely accounts for 10 per cent of the radio emission. We find that ∼80–90 per cent of these nine targets exhibit extended radio structures on 1–25 kpc scales. The quasars’ radiomorphologies, spectral indices, and position on the radio size–luminosity relationship reveals that these sources are consistent with being low power compact radio galaxies. Therefore, we favour radio jets as dominating the radio emission in the majority of these quasars. The radio jets we observe are associated with morphologically and kinematically distinct features in the ionized gas, such as increased turbulence and outflowing bubbles, revealing jet–gas interaction on galactic scales. Importantly, such conclusions could not have been drawn from current low-resolution radio surveys such as FIRST. Our observations support a scenario where compact radio jets, with modest radio luminosities, are a crucial feedback mechanism for massive galaxies during a quasar phase.

Citation

Jarvis, M., Harrison, C., Thomson, A., Circosta, C., Mainieri, V., Alexander, D., …Mullaney, J. (2019). Prevalence of radio jets associated with galactic outflows and feedback from quasars. Monthly Notices of the Royal Astronomical Society, 485(2), 2710-2730. https://doi.org/10.1093/mnras/stz556

Journal Article Type Article
Acceptance Date Feb 19, 2019
Online Publication Date Jan 25, 2019
Publication Date Jan 25, 2019
Deposit Date Jun 26, 2019
Publicly Available Date Mar 28, 2024
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 485
Issue 2
Pages 2710-2730
DOI https://doi.org/10.1093/mnras/stz556
Related Public URLs http://eprints.whiterose.ac.uk/143433/

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Copyright Statement
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. Published by Oxford University Press on behalf of the Royal Astronomical Society.





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