Jarvis, ME;
Harrison, CM;
Mainieri, V;
Alexander, DM;
Battaia, FA;
Rivera, GC;
Circosta, C;
... Ward, SR; + view all
(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)
pp. 1780-1797.
10.1093/mnras/stab549.
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Abstract
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.
| Type: | Article |
|---|---|
| Title: | The quasar feedback survey: discovering hidden Radio-AGN and their connection to the host galaxy ionized gas |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stab549 |
| Publisher version: | http://dx.doi.org/10.1093/mnras/stab549 |
| Language: | English |
| Additional information: | © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model) |
| Keywords: | galaxies: active, galaxies: evolution, galaxies: general, quasars: emission lines, radio continuum: galaxies, ACTIVE GALACTIC NUCLEI, COMPACT STEEP-SPECTRUM, NARROW-LINE REGION, LUMINOUS OBSCURED QUASARS, SEYFERT-GALAXIES, STAR-FORMATION, RADIATIVE-TRANSFER, MASSIVE GALAXIES, VLA OBSERVATIONS, ACCRETION DISKS |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10129399 |
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