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dc.contributor.authorKundu, Sayan
dc.contributor.authorVaidya, Bhargav
dc.contributor.authorMignone, Andrea
dc.contributor.authorHardcastle, Martin J.
dc.date.accessioned2023-09-20T09:30:01Z
dc.date.available2023-09-20T09:30:01Z
dc.date.issued2022-11-17
dc.identifier.citationKundu , S , Vaidya , B , Mignone , A & Hardcastle , M J 2022 , ' A numerical study of the interplay between Fermi acceleration mechanisms in radio lobes of FR-II radio galaxies ' , Astronomy & Astrophysics , vol. 667 , no. November 2022 , A138 , pp. 1-15 . https://doi.org/10.1051/0004-6361/202244251
dc.identifier.issn0004-6361
dc.identifier.otherArXiv: http://arxiv.org/abs/2208.12823v1
dc.identifier.otherORCID: /0000-0003-4223-1117/work/142860073
dc.identifier.urihttp://hdl.handle.net/2299/26700
dc.description©2022 S. Kundu et al. published by EDP Sciences. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY), https://creativecommons.org/licenses/by/4.0/
dc.description.abstractContext: Radio-loud AGNs are thought to possess various sites of particle acceleration, which gives rise to the observed non-thermal spectra. Stochastic turbulent acceleration (STA) and diffusive shock acceleration (DSA) are commonly cited as potential sources of high-energy particles in weakly magnetized environments. Together, these acceleration processes and various radiative losses determine the emission characteristics of these extra-galactic radio sources. Aims: The purpose of this research is to investigate the dynamical interplay between the STA and DSA in the radio lobes of FR-II radio galaxies, as well as the manner in which these acceleration mechanisms, along with a variety of radiative losses, collectively shape the emission features seen in these extra-galactic sources. Methods: A phenomenologically motivated model of STA is considered and subsequently employed on a magneto-hydrodynamically simulated radio lobe through a novel hybrid Eulerian-Lagrangian framework. Results: STA gives rise to a curved particle spectrum that is morphologically different from the usual shock-accelerated spectrum. As a consequence of this structural difference in the underlying particle energy spectrum, various multi-wavelength features arise in the spectral energy distribution of the radio lobe. Additionally, we observe enhanced diffuse X-ray emission from radio lobes for cases where STA is taken into account in addition to DSA.en
dc.format.extent15
dc.format.extent2646444
dc.language.isoeng
dc.relation.ispartofAstronomy & Astrophysics
dc.subjectastro-ph.HE
dc.titleA numerical study of the interplay between Fermi acceleration mechanisms in radio lobes of FR-II radio galaxiesen
dc.contributor.institutionDepartment of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Astrophysics Research (CAR)
dc.contributor.institutionSchool of Physics, Engineering & Computer Science
dc.description.statusPeer reviewed
rioxxterms.versionofrecord10.1051/0004-6361/202244251
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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