Pranav Kukreti
Unmasking the history of 3C 293 with LOFAR sub‐arcsecond imaging
Kukreti, Pranav; Morganti, Raffaella; Shimwell, Timothy W.; Morabito, Leah K.; Beswick, Robert J.; Brienza, Marisa; Hardcastle, Martin J.; Sweijen, Frits; Jackson, Neal; Miley, George K.; Moldon, Javier; Oosterloo, Tom; Gasperin, Francesco de
Authors
Raffaella Morganti
Timothy W. Shimwell
Dr Leah Morabito leah.k.morabito@durham.ac.uk
Associate Professor
Robert J. Beswick
Marisa Brienza
Martin J. Hardcastle
Frits Sweijen
Neal Jackson
George K. Miley
Javier Moldon
Tom Oosterloo
Francesco de Gasperin
Abstract
Active galactic nuclei show episodic activity, which can be evident in galaxies that exhibit restarted radio jets. These restarted jets can interact with their environment, leaving signatures in the radio spectral energy distribution. Tracing these signatures requires resolved spectral index measurements over a broad frequency range. We present such a study for the radio galaxy 3C 293. Using the International Low Frequency Array Telescope (ILT), we probe spatial scales as fine as ∼0.2″ at 144 MHz and to constrain the spectrum, we combine these data with Multi-Element Radio Linked Interferometer Network and Very Large Array archival data at frequencies up to 8.4 GHz. In the inner lobes (∼2 kpc), we detect the presence of a compact steep spectrum (CSS) source with a spectral turnover at ∼225 MHz, caused by free-free absorption from the rich surrounding medium. We find evidence of interaction of the lobes with the rich interstellar medium of the host galaxy. The outer lobes (extending up to ∼100 kpc) have a remarkably uniform spatial distribution of spectral index and only mild spectral curvature (of ∼0.2). Overall, it appears that 3C 293 has gone through multiple (two to three) epochs of activity. This study adds 3C 293 to the new sub-group of restarted galaxies with short interruption time periods (≲1 Myr). This is the first time a spatially resolved study has been performed that simultaneously studies a young CSS source as well as the older outer lobes at such low frequencies.
Citation
Kukreti, P., Morganti, R., Shimwell, T. W., Morabito, L. K., Beswick, R. J., Brienza, M., …Gasperin, F. D. (2021). Unmasking the history of 3C 293 with LOFAR sub‐arcsecond imaging. . https://doi.org/10.1002/asna.20210107
Conference Name | 6th Workshop on Compact Steep Spectrum (CSS) and GHz-Peaked Spectrum (GPS) Radio Sources |
---|---|
Conference Location | Toruń, Poland |
Start Date | May 10, 2021 |
End Date | May 14, 2021 |
Acceptance Date | Nov 22, 2021 |
Online Publication Date | Dec 7, 2021 |
Publication Date | Dec 28, 2021 |
Deposit Date | Jan 24, 2022 |
Publicly Available Date | Mar 29, 2024 |
Volume | 342 |
Pages | 1107-1111 |
Series Number | 9-10 |
Series ISSN | 0004-6337,1521-3994 |
DOI | https://doi.org/10.1002/asna.20210107 |
Files
Published Conference Proceeding
(1.3 Mb)
PDF
Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/
Copyright Statement
© 2021 The Authors. Astronomische Nachrichten published by Wiley-VCH GmbH.
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
You might also like
MIGHTEE: multi-wavelength counterparts in the COSMOS field
(2023)
Journal Article
Subarcsecond-resolution Imaging of M51 with the International LOFAR Telescope
(2023)
Journal Article
A Quick Look at the 3 GHz Radio Sky. II. Hunting for DRAGNs in the VLA Sky Survey
(2023)
Journal Article
Cosmic evolution of radio-AGN feedback: confronting models with data
(2023)
Journal Article
Downloadable Citations
About Durham Research Online (DRO)
Administrator e-mail: dro.admin@durham.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search