dc.contributor.author | Hardcastle, M.J. | |
dc.date.accessioned | 2013-10-29T16:30:56Z | |
dc.date.available | 2013-10-29T16:30:56Z | |
dc.date.issued | 2013-08 | |
dc.identifier.citation | Hardcastle , 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.issn | 0035-8711 | |
dc.identifier.other | PURE: 2502330 | |
dc.identifier.other | PURE UUID: d9a32434-d32e-42a5-8035-d6d9744152d6 | |
dc.identifier.other | WOS: 000322405900046 | |
dc.identifier.other | Scopus: 84881097842 | |
dc.identifier.uri | http://hdl.handle.net/2299/11906 | |
dc.description.abstract | I 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.extent | 9 | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | |
dc.subject | radiation mechanisms: non-thermal | |
dc.subject | galaxies: active | |
dc.subject | radio continuum: galaxies | |
dc.subject | X-RAY-EMISSION | |
dc.subject | HOT-SPOTS | |
dc.subject | SCALE JETS | |
dc.subject | LOBES | |
dc.subject | SPECTRA | |
dc.subject | MULTIFREQUENCY | |
dc.subject | MODELS | |
dc.subject | SIMULATIONS | |
dc.subject | TURBULENCE | |
dc.subject | TRANSPORT | |
dc.title | Synchrotron and inverse-Compton emission from radio galaxies with non-uniform magnetic field and electron distributions | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Centre for Astrophysics Research | |
dc.description.status | Peer reviewed | |
rioxxterms.version | AM | |
rioxxterms.versionofrecord | https://doi.org/10.1093/mnras/stt1024 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |