Modelling large solar proton events with the shock-and-particle model: Extraction of the characteristics of the MHD shock front at the cobpoint

We have developed a new version of a model that combines a two-dimensional Sun-to-Earth magnetohydrodynamic (MHD) simulation of the propagation of a CME-driven shock and a simulation of the transport of particles along the interplanetary magnetic field (IMF) line connecting the shock front and the o...

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Autores: Pomoell, Jens, Aran i Sensat, Maria dels Àngels, Jacobs, Carla, Rodríguez Gasén, Rosa, Poedts, Stefaan, Sanahuja i Parera, Blai
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2015
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/101812
Acceso en línea:https://hdl.handle.net/2445/101812
Access Level:acceso abierto
Palabra clave:Vent solar
Xoc
Partícules (Matèria)
Solar wind
Shock
Particles
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spelling Modelling large solar proton events with the shock-and-particle model: Extraction of the characteristics of the MHD shock front at the cobpointPomoell, JensAran i Sensat, Maria dels ÀngelsJacobs, CarlaRodríguez Gasén, RosaPoedts, StefaanSanahuja i Parera, BlaiVent solarXocPartícules (Matèria)Solar windShockParticlesWe have developed a new version of a model that combines a two-dimensional Sun-to-Earth magnetohydrodynamic (MHD) simulation of the propagation of a CME-driven shock and a simulation of the transport of particles along the interplanetary magnetic field (IMF) line connecting the shock front and the observer. We assume that the shock-accelerated particles are injected at the point along the shock front that intersects this IMF line, i.e. at the cobpoint. Novel features of the model are an improved solar wind model and an enhanced fully automated algorithm to extract the necessary plasma characteristics from the shock simulation. In this work, the new algorithms have been employed to simulate the 2000 April 4 and the 2006 December 13 SEP events. In addition to quantifying the performance of the new model with respect to results obtained using previous versions of the shock-and-particle model, we investigate the semi-empirical relation between the injection rate of shock-accelerated particles, Q, and the jump in speed across the shock, VR, known as the Q(VR) relation. Our results show that while the magnetic field and density compression at the shock front is markedly different than in our previous modeling, the evolution of VR remains largely similar. As a result, we confirm that a simple relation can still be established between Q and VR, which enables the computation of synthetic intensity-time profiles at any location in interplanetary space. Furthermore, the new shock extraction tool is found to yield improved results being in general more robust. These results are important not only with regard to efforts to develop coupled magnetohydrodynamic and particle simulation models, but also to improve space weather related software tools that aim to predict the peak intensities, fluences and proton intensity-time profiles of SEP events (such as the SOLPENCO tool).EDP Sciences2016201620152016info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion20 p.application/pdfapplication/pdfhttps://hdl.handle.net/2445/101812Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: http://dx.doi.org/10.1051/swsc/2015015Journal of Space Weather and Space Climate, 2015, vol. 5, num. A12, p. 1-20http://dx.doi.org/10.1051/swsc/2015015info:eu-repo/grantAgreement/EC/FP7/262468cc-by (c) Pomoell, Jens et al., 2015http://creativecommons.org/licenses/by/3.0/esinfo:eu-repo/semantics/openAccessoai:recercat.cat:2445/1018122026-05-29T05:05:01Z
dc.title.none.fl_str_mv Modelling large solar proton events with the shock-and-particle model: Extraction of the characteristics of the MHD shock front at the cobpoint
title Modelling large solar proton events with the shock-and-particle model: Extraction of the characteristics of the MHD shock front at the cobpoint
spellingShingle Modelling large solar proton events with the shock-and-particle model: Extraction of the characteristics of the MHD shock front at the cobpoint
Pomoell, Jens
Vent solar
Xoc
Partícules (Matèria)
Solar wind
Shock
Particles
title_short Modelling large solar proton events with the shock-and-particle model: Extraction of the characteristics of the MHD shock front at the cobpoint
title_full Modelling large solar proton events with the shock-and-particle model: Extraction of the characteristics of the MHD shock front at the cobpoint
title_fullStr Modelling large solar proton events with the shock-and-particle model: Extraction of the characteristics of the MHD shock front at the cobpoint
title_full_unstemmed Modelling large solar proton events with the shock-and-particle model: Extraction of the characteristics of the MHD shock front at the cobpoint
title_sort Modelling large solar proton events with the shock-and-particle model: Extraction of the characteristics of the MHD shock front at the cobpoint
dc.creator.none.fl_str_mv Pomoell, Jens
Aran i Sensat, Maria dels Àngels
Jacobs, Carla
Rodríguez Gasén, Rosa
Poedts, Stefaan
Sanahuja i Parera, Blai
author Pomoell, Jens
author_facet Pomoell, Jens
Aran i Sensat, Maria dels Àngels
Jacobs, Carla
Rodríguez Gasén, Rosa
Poedts, Stefaan
Sanahuja i Parera, Blai
author_role author
author2 Aran i Sensat, Maria dels Àngels
Jacobs, Carla
Rodríguez Gasén, Rosa
Poedts, Stefaan
Sanahuja i Parera, Blai
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Vent solar
Xoc
Partícules (Matèria)
Solar wind
Shock
Particles
topic Vent solar
Xoc
Partícules (Matèria)
Solar wind
Shock
Particles
description We have developed a new version of a model that combines a two-dimensional Sun-to-Earth magnetohydrodynamic (MHD) simulation of the propagation of a CME-driven shock and a simulation of the transport of particles along the interplanetary magnetic field (IMF) line connecting the shock front and the observer. We assume that the shock-accelerated particles are injected at the point along the shock front that intersects this IMF line, i.e. at the cobpoint. Novel features of the model are an improved solar wind model and an enhanced fully automated algorithm to extract the necessary plasma characteristics from the shock simulation. In this work, the new algorithms have been employed to simulate the 2000 April 4 and the 2006 December 13 SEP events. In addition to quantifying the performance of the new model with respect to results obtained using previous versions of the shock-and-particle model, we investigate the semi-empirical relation between the injection rate of shock-accelerated particles, Q, and the jump in speed across the shock, VR, known as the Q(VR) relation. Our results show that while the magnetic field and density compression at the shock front is markedly different than in our previous modeling, the evolution of VR remains largely similar. As a result, we confirm that a simple relation can still be established between Q and VR, which enables the computation of synthetic intensity-time profiles at any location in interplanetary space. Furthermore, the new shock extraction tool is found to yield improved results being in general more robust. These results are important not only with regard to efforts to develop coupled magnetohydrodynamic and particle simulation models, but also to improve space weather related software tools that aim to predict the peak intensities, fluences and proton intensity-time profiles of SEP events (such as the SOLPENCO tool).
publishDate 2015
dc.date.none.fl_str_mv 2015
2016
2016
2016
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/101812
url https://hdl.handle.net/2445/101812
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: http://dx.doi.org/10.1051/swsc/2015015
Journal of Space Weather and Space Climate, 2015, vol. 5, num. A12, p. 1-20
http://dx.doi.org/10.1051/swsc/2015015
info:eu-repo/grantAgreement/EC/FP7/262468
dc.rights.none.fl_str_mv cc-by (c) Pomoell, Jens et al., 2015
http://creativecommons.org/licenses/by/3.0/es
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Pomoell, Jens et al., 2015
http://creativecommons.org/licenses/by/3.0/es
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 20 p.
application/pdf
application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv Articles publicats en revistes (Física Quàntica i Astrofísica)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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