Ana Jimenez-Gallardo
Extended X-ray emission around FR II radio galaxies: hotspots, lobes and galaxy clusters
Jimenez-Gallardo, Ana; Massaro, Francesco; Paggi, Alessandro; D'Abrusco, Raffaele; Prieto, M. Almudena; Peña-Herazo, Harold A.; Berta, Vittoria; Ricci, Federica; Stuardi, Chiara; Wilkes, Belinda J.; O'Dea, Christopher P.; Baum, Stefi A.; Kraft, Ralph P.; Froman, William R.; Jones, Christine; Mingo, Beatriz; Liuzzo, Elisabetta; Balmaverde, Barbara; Capetti, Alessandro; Missaglia, Valentina; Hardcastle, Martin J.; Baldi, Ranieri D.; Morabito, Leah K.
Authors
Francesco Massaro
Alessandro Paggi
Raffaele D'Abrusco
M. Almudena Prieto
Harold A. Peña-Herazo
Vittoria Berta
Federica Ricci
Chiara Stuardi
Belinda J. Wilkes
Christopher P. O'Dea
Stefi A. Baum
Ralph P. Kraft
William R. Froman
Christine Jones
Beatriz Mingo
Elisabetta Liuzzo
Barbara Balmaverde
Alessandro Capetti
Valentina Missaglia
Martin J. Hardcastle
Ranieri D. Baldi
Professor Leah Morabito leah.k.morabito@durham.ac.uk
Professor
Abstract
We present a systematic analysis of the extended X-ray emission discovered around 35 FR II radio galaxies from the revised Third Cambridge catalog (3CR) Chandra Snapshot Survey with redshifts between 0.05 to 0.9. We aimed to (i) test for the presence of extended X-ray emission around FR II radio galaxies, (ii) investigate if the extended emission origin is due to Inverse Compton scattering of seed photons arising from the Cosmic Microwave Background (IC/CMB) or to thermal emission from an intracluster medium (ICM) and (iii) test the impact of this extended emission on hotspot detection. We investigated the nature of the extended X-ray emission by studying its morphology and compared our results with low-frequency radio observations (i.e., ∼150 MHz), in the TGSS and LOFAR archives, as well as with optical images from Pan-STARRS. In addition, we optimized a search for X-ray counterparts of hotspots in 3CR FR II radio galaxies. We found statistically significant extended emission (>3σ confidence level) along the radio axis for ∼90%, and in the perpendicular direction for ∼60% of our sample. We confirmed the detection of 7 hotspots in the 0.5 - 3 keV. In the cases where the emission in the direction perpendicular to the radio axis is comparable to that along the radio axis, we suggest that the underlying radiative process is thermal emission from ICM. Otherwise, the dominant radiative process is likely non-thermal IC/CMB emission from lobes. We found that non-thermal IC/CMB is the dominant process in ∼70% of the sources in our sample, while thermal emission from the ICM dominates in ∼15% of them.
Citation
Jimenez-Gallardo, A., Massaro, F., Paggi, A., D'Abrusco, R., Prieto, M. A., Peña-Herazo, H. A., …Morabito, L. K. (2021). Extended X-ray emission around FR II radio galaxies: hotspots, lobes and galaxy clusters. Astrophysical Journal Supplement, 252(2), Article 31. https://doi.org/10.3847/1538-4365/abcecd
Journal Article Type | Article |
---|---|
Acceptance Date | Oct 30, 2020 |
Online Publication Date | Feb 5, 2021 |
Publication Date | 2021-02 |
Deposit Date | Jan 11, 2021 |
Publicly Available Date | Feb 5, 2022 |
Journal | Astrophysical Journal Supplement |
Print ISSN | 0067-0049 |
Publisher | American Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 252 |
Issue | 2 |
Article Number | 31 |
DOI | https://doi.org/10.3847/1538-4365/abcecd |
Public URL | https://durham-repository.worktribe.com/output/1281694 |
Related Public URLs | https://arxiv.org/abs/2011.04668 |
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Copyright Statement
This is the Accepted Manuscript version of an article accepted for publication in The Astrophysical Journal Supplement Series. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.3847/1538-4365/abcecd
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