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dc.contributor.authorHardcastle, M.J.
dc.date.accessioned2013-10-29T16:30:56Z
dc.date.available2013-10-29T16:30:56Z
dc.date.issued2013-08
dc.identifier.citationHardcastle , M J 2013 , ' Synchrotron and inverse-Compton emission from radio galaxies with non-uniform magnetic field and electron distributions ' , Monthly Notices of the Royal Astronomical Society , vol. 433 , no. 4 , pp. 3364-3372 . https://doi.org/10.1093/mnras/stt1024
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 2502330
dc.identifier.otherPURE UUID: d9a32434-d32e-42a5-8035-d6d9744152d6
dc.identifier.otherWOS: 000322405900046
dc.identifier.otherScopus: 84881097842
dc.identifier.urihttp://hdl.handle.net/2299/11906
dc.description.abstractI investigate the effect of non-uniform magnetic fields in the extended structures of radio galaxies on the observed synchrotron and inverse-Compton emission. On the assumption of an isotropic field, with a given power spectrum and a Gaussian distribution of the Cartesian components of the magnetic field strength, I derive a simple integral that can be used numerically to calculate the synchrotron emissivity from any electron population. In the case of power-law spectra, I show that it is possible to estimate the difference between the synchrotron emissivity from a region with such a field and that from the commonly assumed arrangement where B is constant everywhere, though fully tangled, and that this difference is small, though it increases if the electron energy density scales with the field. An aged electron spectrum in such a field produces a characteristic curved synchrotron spectrum which differs significantly from the classical Jaffe-Perola spectrum, and I discuss some effects that this might have on standard spectral age fitting. Finally, I show that inverse-Compton scattering of the cosmic microwave background is only moderately affected by such a field structure, with the effects becoming more important if the electrons follow the field. Magnetic field estimates in the literature from combined synchrotron and inverse-Compton modelling will give reasonable estimates of the mean magnetic field energy density if the field is non-uniform but isotropic.en
dc.format.extent9
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.subjectradiation mechanisms: non-thermal
dc.subjectgalaxies: active
dc.subjectradio continuum: galaxies
dc.subjectX-RAY-EMISSION
dc.subjectHOT-SPOTS
dc.subjectSCALE JETS
dc.subjectLOBES
dc.subjectSPECTRA
dc.subjectMULTIFREQUENCY
dc.subjectMODELS
dc.subjectSIMULATIONS
dc.subjectTURBULENCE
dc.subjectTRANSPORT
dc.titleSynchrotron and inverse-Compton emission from radio galaxies with non-uniform magnetic field and electron distributionsen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1093/mnras/stt1024
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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