dc.contributor.author | Krause, M. | |
dc.contributor.author | Alexander, P. | |
dc.contributor.author | Riley, J. | |
dc.contributor.author | Hopton, D. | |
dc.date.accessioned | 2018-09-12T00:10:49Z | |
dc.date.available | 2018-09-12T00:10:49Z | |
dc.date.issued | 2012-12-21 | |
dc.identifier.citation | Krause , M , Alexander , P , Riley , J & Hopton , D 2012 , ' A new connection between the jet opening angle and the large-scale morphology of extragalactic radio sources ' , Monthly Notices of the Royal Astronomical Society , vol. 427 , no. 4 , pp. 3196-3208 . https://doi.org/10.1111/j.1365-2966.2012.21645.x | |
dc.identifier.issn | 0035-8711 | |
dc.identifier.other | Bibtex: urn:404e644c360acb3735e6be5601fb9bf8 | |
dc.identifier.other | ORCID: /0000-0002-9610-5629/work/63687363 | |
dc.identifier.uri | http://hdl.handle.net/2299/20553 | |
dc.description | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. © 2012 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. | |
dc.description.abstract | In the case of an initially conical jet, we study the relation between jet collimation by the external pressure and large-scale morphology. We first consider the important length-scales in the problem, and then carry out axisymmetric hydrodynamic simulations that include, for certain parameters, all these length-scales. We find three important scales related to the collimation region: (i) where the sideways ram pressure equals the external pressure, (ii) where the jet density equals the ambient density and (iii) where the forward ram pressure falls below the ambient pressure. These scales are set by the external Mach number and opening angle of the jet. We demonstrate that the relative magnitudes of these scales determine the collimation, Mach number, density and morphology of the large-scale jet. Based on the analysis of the shock structure, we reproduce successfully the morphology of Fanaroff–Riley (FR) class I and II radio sources. Within the framework of the model, an FR I radio source must have a large intrinsic opening angle. Entrainment of ambient gas might also be important. We also show that all FR I sources with radio lobes or similar features must have had an earlier FR II phase. | en |
dc.format.extent | 13 | |
dc.format.extent | 1826805 | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | |
dc.subject | methods: numerical, galaxies: jets, radio continuum: galaxies | |
dc.title | A new connection between the jet opening angle and the large-scale morphology of extragalactic radio sources | en |
dc.contributor.institution | Centre for Astrophysics Research (CAR) | |
dc.contributor.institution | School of Physics, Engineering & Computer Science | |
dc.contributor.institution | Department of Physics, Astronomy and Mathematics | |
dc.description.status | Peer reviewed | |
rioxxterms.versionofrecord | 10.1111/j.1365-2966.2012.21645.x | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |