A theory of the fundamental plasma emission of type-III solar radio bursts
Autor(a) principal: | |
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Data de Publicação: | 2002 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/98552 |
Resumo: | Results from plasma wave experiments in spacecraft give support to nonlinear interactions involving Langmuir waves, electromagnetic waves and ion-acoustic waves in association with type III solar radio bursts. In this paper we present a theory of the fundamental plasma emission of type-III solar radio bursts. Starting from the generalized Zakharov equations, considering the pump wave as a pair of oppositely propagating Langmuir waves with di erent amplitudes, and the excitation of electromagnetic and induced Langmuir waves, we obtain a general dispersion relation for the coupled waves. We numerically solve the general dispersion relation using the pump wave amplitude and plasma parameters as observed in the interplanetary medium.We compare our results with previous models. We find that the stability properties depend on the pump wave numbers and on the ratio of wave amplitude between the forward and backward pump wave. The inclusion of a second pump wave allows the simultaneous generation of up and down converted electromagnetic waves. The presence of a second pump with di erent amplitude from the first one brings a region of convective instability not present when amplitudes are the same. |
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Alves, Maria VirginiaChian, Abraham Chian-LongMoraes, Márcio A.E. deAbalde, José Ricardo G.Rizzato, Felipe Barbedo2014-07-24T02:07:06Z20020004-6361http://hdl.handle.net/10183/98552000325483Results from plasma wave experiments in spacecraft give support to nonlinear interactions involving Langmuir waves, electromagnetic waves and ion-acoustic waves in association with type III solar radio bursts. In this paper we present a theory of the fundamental plasma emission of type-III solar radio bursts. Starting from the generalized Zakharov equations, considering the pump wave as a pair of oppositely propagating Langmuir waves with di erent amplitudes, and the excitation of electromagnetic and induced Langmuir waves, we obtain a general dispersion relation for the coupled waves. We numerically solve the general dispersion relation using the pump wave amplitude and plasma parameters as observed in the interplanetary medium.We compare our results with previous models. We find that the stability properties depend on the pump wave numbers and on the ratio of wave amplitude between the forward and backward pump wave. The inclusion of a second pump wave allows the simultaneous generation of up and down converted electromagnetic waves. The presence of a second pump with di erent amplitude from the first one brings a region of convective instability not present when amplitudes are the same.application/pdfengAstronomy and astrophysics. Les Ulis. Vol. 390, no. 1 (July 2002), p. 351-357Teoria de plasmasRadiação solar em radio-frequênciaInstabilitiesPlasmasWavesRadio radiationSolar windA theory of the fundamental plasma emission of type-III solar radio burstsEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000325483.pdf000325483.pdfTexto completo (inglês)application/pdf196784http://www.lume.ufrgs.br/bitstream/10183/98552/1/000325483.pdfaf33edf99d2769b11b42d9c704556bd7MD51TEXT000325483.pdf.txt000325483.pdf.txtExtracted Texttext/plain30056http://www.lume.ufrgs.br/bitstream/10183/98552/2/000325483.pdf.txt85576af9ef216c1bdbdb868dd1a421ddMD52THUMBNAIL000325483.pdf.jpg000325483.pdf.jpgGenerated Thumbnailimage/jpeg2044http://www.lume.ufrgs.br/bitstream/10183/98552/3/000325483.pdf.jpgbbcf64d6ae50708154d8fe3e5c68fe08MD5310183/985522023-08-31 03:31:34.040475oai:www.lume.ufrgs.br:10183/98552Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-08-31T06:31:34Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
A theory of the fundamental plasma emission of type-III solar radio bursts |
title |
A theory of the fundamental plasma emission of type-III solar radio bursts |
spellingShingle |
A theory of the fundamental plasma emission of type-III solar radio bursts Alves, Maria Virginia Teoria de plasmas Radiação solar em radio-frequência Instabilities Plasmas Waves Radio radiation Solar wind |
title_short |
A theory of the fundamental plasma emission of type-III solar radio bursts |
title_full |
A theory of the fundamental plasma emission of type-III solar radio bursts |
title_fullStr |
A theory of the fundamental plasma emission of type-III solar radio bursts |
title_full_unstemmed |
A theory of the fundamental plasma emission of type-III solar radio bursts |
title_sort |
A theory of the fundamental plasma emission of type-III solar radio bursts |
author |
Alves, Maria Virginia |
author_facet |
Alves, Maria Virginia Chian, Abraham Chian-Long Moraes, Márcio A.E. de Abalde, José Ricardo G. Rizzato, Felipe Barbedo |
author_role |
author |
author2 |
Chian, Abraham Chian-Long Moraes, Márcio A.E. de Abalde, José Ricardo G. Rizzato, Felipe Barbedo |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Alves, Maria Virginia Chian, Abraham Chian-Long Moraes, Márcio A.E. de Abalde, José Ricardo G. Rizzato, Felipe Barbedo |
dc.subject.por.fl_str_mv |
Teoria de plasmas Radiação solar em radio-frequência |
topic |
Teoria de plasmas Radiação solar em radio-frequência Instabilities Plasmas Waves Radio radiation Solar wind |
dc.subject.eng.fl_str_mv |
Instabilities Plasmas Waves Radio radiation Solar wind |
description |
Results from plasma wave experiments in spacecraft give support to nonlinear interactions involving Langmuir waves, electromagnetic waves and ion-acoustic waves in association with type III solar radio bursts. In this paper we present a theory of the fundamental plasma emission of type-III solar radio bursts. Starting from the generalized Zakharov equations, considering the pump wave as a pair of oppositely propagating Langmuir waves with di erent amplitudes, and the excitation of electromagnetic and induced Langmuir waves, we obtain a general dispersion relation for the coupled waves. We numerically solve the general dispersion relation using the pump wave amplitude and plasma parameters as observed in the interplanetary medium.We compare our results with previous models. We find that the stability properties depend on the pump wave numbers and on the ratio of wave amplitude between the forward and backward pump wave. The inclusion of a second pump wave allows the simultaneous generation of up and down converted electromagnetic waves. The presence of a second pump with di erent amplitude from the first one brings a region of convective instability not present when amplitudes are the same. |
publishDate |
2002 |
dc.date.issued.fl_str_mv |
2002 |
dc.date.accessioned.fl_str_mv |
2014-07-24T02:07:06Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
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http://hdl.handle.net/10183/98552 |
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0004-6361 |
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000325483 |
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0004-6361 000325483 |
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http://hdl.handle.net/10183/98552 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Astronomy and astrophysics. Les Ulis. Vol. 390, no. 1 (July 2002), p. 351-357 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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