Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/25231
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Nava, Lara | en_US |
dc.contributor.author | Nakar, Ehud | en_US |
dc.contributor.author | Piran, Tsvi | en_US |
dc.date.accessioned | 2020-05-27T13:21:33Z | - |
dc.date.available | 2020-05-27T13:21:33Z | - |
dc.date.issued | 2016 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/25231 | - |
dc.description.abstract | Polarization measurements from relativistic outflows are a valuable tool to probe the geometry of the emission region and the microphysics of the particle distribution. Indeed, the polarization level depends on (I) the local magnetic field orientation, (II) the geometry of the emitting region with respect to the line of sight and (III) the electron pitch angle distribution. Here we consider optically thin synchrotron emission and we extend the theory of circular polarization from a point source to an extended radially expanding relativistic jet. We present numerical estimates for both linear and circular polarization in such systems. We consider different configurations of the magnetic field, spherical and jetted outflows, isotropic and anisotropic pitch angle distributions, and outline the difficulty in obtaining the reported high level of circular polarization observed in the afterglow of Gamma Ray Burst (GRB) 121024A. We conclude that the origin of the observed polarization cannot be intrinsic to an optically thin synchrotron process, even when the electron pitch angle distribution is extremely anisotropic. | en_US |
dc.language.iso | eng | en_US |
dc.title | Linear and circular polarization in ultra-relativistic synchrotron sources - implications to GRB afterglows | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stv2434 | en_US |
dc.identifier.scopus | 2-s2.0-85017302205 | en_US |
dc.identifier.isi | 000368007100034 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/455/2/1594/1120434 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 455 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | 1594 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 3 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ISR | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2016MNRAS.455.1594N | en_US |
dc.relation.fund | FP7 | en_US |
dc.relation.ercsector | ERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | O.A. Brera | - |
crisitem.author.orcid | 0000-0001-5960-0455 | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
stv2434.pdf | Pdf editoriale | 1.71 MB | Adobe PDF | View/Open |
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Items in DSpace are published in Open Access, unless otherwise indicated.