Jarvis, M.E., Harrison, C.M., Thomson, A.P. et al. (7 more authors) (2019) Prevalence of radio jets associated with galactic outflows and feedback from quasars. Monthly Notices of the Royal Astronomical Society, 485 (2). pp. 2710-2730. ISSN 0035-8711
Abstract
We present 1–7 GHz high-resolution radio imaging (VLA and e-MERLIN) and spatially-resolved ionized gas kinematics for ten 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 (FWHM≈800–1800 km s−1). Although ‘radio-quiet’ and not ‘radio AGN’ 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’ radio morphologies, 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.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. This is an author produced version of a paper subsequently published in Monthly Notices of the Royal Astronomical Society. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Galaxies: active; galaxy: evolution; galaxies: jets; quasars: general |
Dates: |
|
Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Funding Information: | Funder Grant number SCIENCE AND TECHNOLOGY FACILITIES COUNCIL ST/R000964/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 08 Mar 2019 11:00 |
Last Modified: | 19 Nov 2021 11:32 |
Status: | Published |
Publisher: | Oxford University Press |
Refereed: | Yes |
Identification Number: | 10.1093/mnras/stz556 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:143433 |