Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/34515
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | FARINELLI, Ruben | en_US |
dc.contributor.author | BASAK, RUPAL | en_US |
dc.contributor.author | AMATI, LORENZO | en_US |
dc.contributor.author | GUIDORZI, CRISTIANO | en_US |
dc.contributor.author | Frontera, Filippo | en_US |
dc.date.accessioned | 2024-01-09T14:03:30Z | - |
dc.date.available | 2024-01-09T14:03:30Z | - |
dc.date.issued | 2021 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/34515 | - |
dc.description.abstract | Gamma-ray bursts (GRBs) are known to be highly collimated events, and are mostly detectable when they are seen on-axis or very nearly on-axis. However, GRBs can be seen from off-axis angles, and the recent detection of a short GRB associated with a gravitational wave event has conclusively shown such a scenario. The observer viewing angle plays an important role in the observable spectral shape and the energetic of such events. We present a numerical model that is based on the single-pulse approximation with emission from a top-hat jet and has been developed to investigate the effects of the observer viewing angle. We assume a conical jet parametrized by a radius R<SUB>jet</SUB>, half-opening angle θ<SUB>jet</SUB>, a comoving-frame emissivity law and an observer viewing angle θ<SUB>obs</SUB>, and then study the effects for the conditions θ<SUB>obs</SUB> < θ<SUB>jet</SUB> and θ<SUB>obs</SUB> > θ<SUB>jet</SUB>. We present results considering a smoothly broken power-law emissivity law in jet comoving frame, albeit the model implementation easily allows to consider other emissivity laws. We find that the relation $E^{\rm i}_{\rm p}\propto E_{\rm iso}^{0.5}$ (Amati relation) is naturally obtained from pure relativistic kinematic when $\Gamma \gtrsim 10$ and θ<SUB>obs</SUB> < θ<SUB>jet</SUB>; on the contrary, when θ<SUB>obs</SUB> > θ<SUB>jet</SUB> it results $E^{\rm i}_{\rm p}\propto E_{\rm iso}^{0.25}$ . Using data from literature for a class of well-know sub-energetic GRBs, we show that their position in the $E^{\rm i}_{\rm p}\!-\!E_{\rm iso}$ plane is consistent with event observed off-axis. The presented model is developed as a module to be integrated in spectral fitting software package XSPEC and can be used by the scientific community. | en_US |
dc.language.iso | eng | en_US |
dc.title | A numerical jet model for the prompt emission of gamma–ray bursts | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/staa4048 | en_US |
dc.identifier.scopus | 2-s2.0-85100814242 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/501/4/5723/6067371 | en_US |
dc.identifier.url | http://arxiv.org/abs/2101.02984v1 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 501 | en_US |
dc.relation.issue | 4 | en_US |
dc.relation.firstpage | 5723 | en_US |
dc.relation.lastpage | 5732 | en_US |
dc.type.referee | REF_1 | 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 | 2021MNRAS.501.5723F | 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 | OAS Bologna | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.orcid | 0000-0003-2212-367X | - |
crisitem.author.orcid | 0000-0001-5488-7258 | - |
crisitem.author.orcid | 0000-0001-5355-7388 | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
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File | Descrizione | Dimensioni | Formato | |
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staa4048.pdf | Pdf editoriale | 890.71 kB | Adobe PDF | Visualizza/apri |
2101.02984.pdf | preprint | 1.41 MB | Adobe PDF | Visualizza/apri |
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