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Accretion mode versus radio morphology in the LOFAR deep fields

Accretion mode versus radio morphology in the LOFAR deep fields
Accretion mode versus radio morphology in the LOFAR deep fields
Radio-loud active galaxies have two accretion modes [radiatively inefficient (RI) and radiatively efficient (RE)], with distinct optical and infrared signatures, and two jet dynamical behaviours, which in arcsec- to arcmin-resolution radio surveys manifest primarily as centre- or edge-brightened structures [Fanaroff–Riley (FR) class I and II]. The nature of the relationship between accretion mode and radio morphology (FR class) has been the subject of long debate. We present a comprehensive investigation of this relationship for a sample of 286 well-resolved radio galaxies in the LOFAR Two-metre Sky Survey Deep Fields (LoTSS-Deep) first data release, for which robust morphological and accretion mode classifications have been made. We find that two-thirds of luminous FRII radio galaxies are RI, and identify no significant differences in the visual appearance or source dynamic range (peak/mean surface brightness) of the RI and RE FRIIs, demonstrating that both RI and RE systems can produce FRII structures. We also find a significant population of low-luminosity FRIIs (predominantly RI), supporting our earlier conclusion that FRII radio structures can be produced at all radio luminosities. We demonstrate that in the luminosity range where both morphologies are present, the probability of producing FRI or FRII radio morphology is directly linked to stellar mass, while across all morphologies and luminosities, RE accretion occurs in systems with high specific star formation rate, presumably because this traces fuel availability. In summary, the relationship between accretion mode and radio morphology is very indirect, with host-galaxy environment controlling these two key parameters in different ways.
black hole physics, galaxies: active, galaxies: jets, radio continuum: galaxies
0035-8711
3250-3271
Baldi, Ranieri Diego
c416ed4c-5d1c-48ee-989c-3a8ab38cd124
Ineson, Judith
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Mingo, B.
72d66265-6364-4146-b6fb-992139f4bc98
Croston, J. H.
a102101f-0557-4eb9-bedd-7e40c85ad682
Best, P. N.
16943095-f587-4774-b75d-9161ce7c2575
Duncan, K. J.
20f161cf-9ef9-42b7-91a4-f55abb611e13
Hardcastle, M. J.
43e73b1a-9ff1-479c-b9d2-5a730f1bdc8e
Kondapally, R.
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Prandoni, I.
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Sabater, J.
88a62e81-0be3-418e-8ca0-3ebbced36f36
Shimwell, Timothy W.
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Williams, W.L.
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Bonato, M.
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Bondi, M.
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Dabhade, P.
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Gürkan, G.
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Magliocchetti, M.
631de54c-6a62-40fe-bb7a-b9bf4ddf93fb
Miley, G.K.
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J. C. S., Pierce
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Röttgering, H.J.A.
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Baldi, Ranieri Diego
c416ed4c-5d1c-48ee-989c-3a8ab38cd124
Ineson, Judith
2786e312-601a-4387-bb3d-deda0a05219f
Mingo, B.
72d66265-6364-4146-b6fb-992139f4bc98
Croston, J. H.
a102101f-0557-4eb9-bedd-7e40c85ad682
Best, P. N.
16943095-f587-4774-b75d-9161ce7c2575
Duncan, K. J.
20f161cf-9ef9-42b7-91a4-f55abb611e13
Hardcastle, M. J.
43e73b1a-9ff1-479c-b9d2-5a730f1bdc8e
Kondapally, R.
631d5dc1-2fae-407f-94da-1e49d6d42f8f
Prandoni, I.
218f8114-d2da-4953-8651-7f87e691ae2b
Sabater, J.
88a62e81-0be3-418e-8ca0-3ebbced36f36
Shimwell, Timothy W.
5525d776-1e36-4d25-85ec-45bad5a60e68
Williams, W.L.
810a03ce-ad1b-4230-b0f6-06d21764d20a
Bonato, M.
f15f8fed-acd5-4f0e-b545-136aca5aab5e
Bondi, M.
df3bff10-e2e8-4944-ac1f-a10d89b3fc7f
Dabhade, P.
f98a02fc-68c7-4fe7-b99e-3bf19ef1bf49
Gürkan, G.
c035e6bf-3301-4938-8b00-cac419c8493d
Magliocchetti, M.
631de54c-6a62-40fe-bb7a-b9bf4ddf93fb
Miley, G.K.
0571b63f-4bcd-4194-9d80-5e3eb942eede
J. C. S., Pierce
ff50dcfc-9397-4673-9729-62e6c70b654a
Röttgering, H.J.A.
071a6f5d-9a84-41f9-8ede-ba2764d76a19

Baldi, Ranieri Diego, Ineson, Judith, Mingo, B., Croston, J. H., Best, P. N., Duncan, K. J., Hardcastle, M. J., Kondapally, R., Prandoni, I., Sabater, J., Shimwell, Timothy W., Williams, W.L., Bonato, M., Bondi, M., Dabhade, P., Gürkan, G., Magliocchetti, M., Miley, G.K., J. C. S., Pierce and Röttgering, H.J.A. (2022) Accretion mode versus radio morphology in the LOFAR deep fields. Monthly Notices of the Royal Astronomical Society, 511 (3), 3250-3271. (doi:10.1093/mnras/stac140).

Record type: Article

Abstract

Radio-loud active galaxies have two accretion modes [radiatively inefficient (RI) and radiatively efficient (RE)], with distinct optical and infrared signatures, and two jet dynamical behaviours, which in arcsec- to arcmin-resolution radio surveys manifest primarily as centre- or edge-brightened structures [Fanaroff–Riley (FR) class I and II]. The nature of the relationship between accretion mode and radio morphology (FR class) has been the subject of long debate. We present a comprehensive investigation of this relationship for a sample of 286 well-resolved radio galaxies in the LOFAR Two-metre Sky Survey Deep Fields (LoTSS-Deep) first data release, for which robust morphological and accretion mode classifications have been made. We find that two-thirds of luminous FRII radio galaxies are RI, and identify no significant differences in the visual appearance or source dynamic range (peak/mean surface brightness) of the RI and RE FRIIs, demonstrating that both RI and RE systems can produce FRII structures. We also find a significant population of low-luminosity FRIIs (predominantly RI), supporting our earlier conclusion that FRII radio structures can be produced at all radio luminosities. We demonstrate that in the luminosity range where both morphologies are present, the probability of producing FRI or FRII radio morphology is directly linked to stellar mass, while across all morphologies and luminosities, RE accretion occurs in systems with high specific star formation rate, presumably because this traces fuel availability. In summary, the relationship between accretion mode and radio morphology is very indirect, with host-galaxy environment controlling these two key parameters in different ways.

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Accepted/In Press date: 11 January 2022
Published date: 1 April 2022
Additional Information: Publisher Copyright: © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.
Keywords: black hole physics, galaxies: active, galaxies: jets, radio continuum: galaxies

Identifiers

Local EPrints ID: 456540
URI: http://eprints.soton.ac.uk/id/eprint/456540
ISSN: 0035-8711
PURE UUID: b92d0054-019f-4022-85c8-2622c69c6284

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Date deposited: 04 May 2022 17:16
Last modified: 29 Jun 2022 17:01

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Contributors

Author: Ranieri Diego Baldi
Author: Judith Ineson
Author: B. Mingo
Author: J. H. Croston
Author: P. N. Best
Author: K. J. Duncan
Author: M. J. Hardcastle
Author: R. Kondapally
Author: I. Prandoni
Author: J. Sabater
Author: Timothy W. Shimwell
Author: W.L. Williams
Author: M. Bonato
Author: M. Bondi
Author: P. Dabhade
Author: G. Gürkan
Author: M. Magliocchetti
Author: G.K. Miley
Author: Pierce J. C. S.
Author: H.J.A. Röttgering

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