dc.contributor.author Vries, M. N. de dc.contributor.author Wise, M. W. dc.contributor.author Huppenkothen, D. dc.contributor.author Nulsen, P. E. J. dc.contributor.author Snios, B. dc.contributor.author Hardcastle, M. J. dc.contributor.author Birkinshaw, M. dc.contributor.author Worrall, D. M. dc.contributor.author Duffy, R. T. dc.contributor.author McNamara, B. R. dc.date.accessioned 2018-08-16T00:17:06Z dc.date.available 2018-08-16T00:17:06Z dc.date.issued 2018-08-21 dc.identifier.citation Vries , M N D , Wise , M W , Huppenkothen , D , Nulsen , P E J , Snios , B , Hardcastle , M J , Birkinshaw , M , Worrall , D M , Duffy , R T & McNamara , B R 2018 , ' Detection of non-thermal X-ray emission in the lobes and jets of Cygnus A ' , Monthly Notices of the Royal Astronomical Society , vol. 478 , no. 3 , pp. 4010–4029 . https://doi.org/10.1093/mnras/sty1232 dc.identifier.issn 0035-8711 dc.identifier.other PURE: 13825429 dc.identifier.other PURE UUID: eaa9c35e-8805-4b77-a263-d86f4002b339 dc.identifier.other ArXiv: http://arxiv.org/abs/1805.03114v1 dc.identifier.other Scopus: 85060535462 dc.identifier.uri http://hdl.handle.net/2299/20442 dc.description This article has been published in Monthly Notices of the Royal Astronomical Society © 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. 21 pages, 8 figures dc.description.abstract We present a spectral analysis of the lobes and X-ray jets of Cygnus A, using more than 2 Ms of $\textit{Chandra}$ observations. The X-ray jets are misaligned with the radio jets and significantly wider. We detect non-thermal emission components in both lobes and jets. For the eastern lobe and jet, we find 1 keV flux densities of $71_{-10}^{+10}$ nJy and $24_{-4}^{+4}$ nJy, and photon indices of $1.72_{-0.03}^{+0.03}$ and $1.64_{-0.04}^{+0.04}$ respectively. For the western lobe and jet, we find flux densities of $50_{-13}^{+12}$ nJy and $13_{-5}^{+5}$ nJy, and photon indices of $1.97_{-0.10}^{+0.23}$ and $1.86_{-0.12}^{+0.18}$ respectively. Using these results, we modeled the electron energy distributions of the lobes as broken power laws with age breaks. We find that a significant population of non-radiating particles is required to account for the total pressure of the eastern lobe. In the western lobe, no such population is required and the low energy cutoff to the electron distribution there needs to be raised to obtain pressures consistent with observations. This discrepancy is a consequence of the differing X-ray photon indices, which may indicate that the turnover in the inverse-Compton spectrum of the western lobe is at lower energies than in the eastern lobe. We modeled the emission from both jets as inverse-Compton emission. There is a narrow region of parameter space for which the X-ray jet can be a relic of an earlier active phase, although lack of knowledge about the jet's electron distribution and particle content makes the modelling uncertain. en dc.language.iso eng dc.relation.ispartof Monthly Notices of the Royal Astronomical Society dc.rights Open dc.subject astro-ph.HE dc.title Detection of non-thermal X-ray emission in the lobes and jets of Cygnus A en dc.contributor.institution School of Physics, Astronomy and Mathematics dc.contributor.institution Centre for Astrophysics Research dc.description.status Peer reviewed dc.description.versiontype Final Published version dcterms.dateAccepted 2018-08-21 rioxxterms.version AM rioxxterms.version VoR rioxxterms.versionofrecord https://doi.org/10.1093/mnras/sty1232 rioxxterms.licenseref.uri Other rioxxterms.type Journal Article/Review herts.preservation.rarelyaccessed true herts.rights.accesstype Open
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