Field‐Aligned Proton Beams Upstream of the Martian Bow Shock: First Observations

Autores
Meziane, K.; Mazelle, C. X.; Simon Wedlund, C.; Halekas, J. S.; Hamza, A. M.; Bertucci, Cesar; Mitchell, D. L.; Espley, J. R.
Año de publicación
2025
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We report fast sunward-propagating energetic proton field-aligned beams (FABs) observed about one Mars radius upstream of the Martian bow shock, recorded by the Solar Wind Ion Analyzer instrument on the MAVEN spacecraft. The velocity distributions show that all the beams have a bulk parallel speed ${v}_{B}=(1.35pm 0.21){V}_{S}$, exceeding the shock speed ${V}_{S}$. Several FABs are observed in the field-aligned region, linked to the quasi-parallel shock. The nearly synchronous variations of shock ${heta }_{Bn}$ values and beam speeds rule out specular reflection, suggesting a non-specular reflection mechanism. However, the slower Martian foreshock beam speeds remain unexplained compared to their terrestrial counterparts.
Fil: Meziane, K.. University Of New Brunswick.; Canadá
Fil: Mazelle, C. X.. Centre National de la Recherche Scientifique; Francia
Fil: Simon Wedlund, C.. Austrian Academy Of Sciences;
Fil: Halekas, J. S.. University of Iowa; Estados Unidos
Fil: Hamza, A. M.. University Of New Brunswick.; Canadá
Fil: Bertucci, Cesar. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: Mitchell, D. L.. University of California at Berkeley; Estados Unidos
Fil: Espley, J. R.. No especifíca;
Materia
MARS
FORESHOCK
MAVEN
SOLAR WIND
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/277512
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/277512
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Field‐Aligned Proton Beams Upstream of the Martian Bow Shock: First ObservationsMeziane, K.Mazelle, C. X.Simon Wedlund, C.Halekas, J. S.Hamza, A. M.Bertucci, CesarMitchell, D. L.Espley, J. R.MARSFORESHOCKMAVENSOLAR WINDhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We report fast sunward-propagating energetic proton field-aligned beams (FABs) observed about one Mars radius upstream of the Martian bow shock, recorded by the Solar Wind Ion Analyzer instrument on the MAVEN spacecraft. The velocity distributions show that all the beams have a bulk parallel speed ${v}_{B}=(1.35pm 0.21){V}_{S}$, exceeding the shock speed ${V}_{S}$. Several FABs are observed in the field-aligned region, linked to the quasi-parallel shock. The nearly synchronous variations of shock ${heta }_{Bn}$ values and beam speeds rule out specular reflection, suggesting a non-specular reflection mechanism. However, the slower Martian foreshock beam speeds remain unexplained compared to their terrestrial counterparts.Fil: Meziane, K.. University Of New Brunswick.; CanadáFil: Mazelle, C. X.. Centre National de la Recherche Scientifique; FranciaFil: Simon Wedlund, C.. Austrian Academy Of Sciences;Fil: Halekas, J. S.. University of Iowa; Estados UnidosFil: Hamza, A. M.. University Of New Brunswick.; CanadáFil: Bertucci, Cesar. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; ArgentinaFil: Mitchell, D. L.. University of California at Berkeley; Estados UnidosFil: Espley, J. R.. No especifíca;American Geophysical Union2025-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/277512Meziane, K.; Mazelle, C. X.; Simon Wedlund, C.; Halekas, J. S.; Hamza, A. M.; et al.; Field‐Aligned Proton Beams Upstream of the Martian Bow Shock: First Observations; American Geophysical Union; Geophysical Research Letters; 52; 11; 5-2025; 1-100094-8276CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2025GL115483info:eu-repo/semantics/altIdentifier/doi/10.1029/2025GL115483info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-12-23T13:13:11Zoai:ri.conicet.gov.ar:11336/277512instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-12-23 13:13:11.309CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Field‐Aligned Proton Beams Upstream of the Martian Bow Shock: First Observations
title Field‐Aligned Proton Beams Upstream of the Martian Bow Shock: First Observations
spellingShingle Field‐Aligned Proton Beams Upstream of the Martian Bow Shock: First Observations
Meziane, K.
MARS
FORESHOCK
MAVEN
SOLAR WIND
title_short Field‐Aligned Proton Beams Upstream of the Martian Bow Shock: First Observations
title_full Field‐Aligned Proton Beams Upstream of the Martian Bow Shock: First Observations
title_fullStr Field‐Aligned Proton Beams Upstream of the Martian Bow Shock: First Observations
title_full_unstemmed Field‐Aligned Proton Beams Upstream of the Martian Bow Shock: First Observations
title_sort Field‐Aligned Proton Beams Upstream of the Martian Bow Shock: First Observations
dc.creator.none.fl_str_mv Meziane, K.
Mazelle, C. X.
Simon Wedlund, C.
Halekas, J. S.
Hamza, A. M.
Bertucci, Cesar
Mitchell, D. L.
Espley, J. R.
author Meziane, K.
author_facet Meziane, K.
Mazelle, C. X.
Simon Wedlund, C.
Halekas, J. S.
Hamza, A. M.
Bertucci, Cesar
Mitchell, D. L.
Espley, J. R.
author_role author
author2 Mazelle, C. X.
Simon Wedlund, C.
Halekas, J. S.
Hamza, A. M.
Bertucci, Cesar
Mitchell, D. L.
Espley, J. R.
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv MARS
FORESHOCK
MAVEN
SOLAR WIND
topic MARS
FORESHOCK
MAVEN
SOLAR WIND
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We report fast sunward-propagating energetic proton field-aligned beams (FABs) observed about one Mars radius upstream of the Martian bow shock, recorded by the Solar Wind Ion Analyzer instrument on the MAVEN spacecraft. The velocity distributions show that all the beams have a bulk parallel speed ${v}_{B}=(1.35pm 0.21){V}_{S}$, exceeding the shock speed ${V}_{S}$. Several FABs are observed in the field-aligned region, linked to the quasi-parallel shock. The nearly synchronous variations of shock ${heta }_{Bn}$ values and beam speeds rule out specular reflection, suggesting a non-specular reflection mechanism. However, the slower Martian foreshock beam speeds remain unexplained compared to their terrestrial counterparts.
Fil: Meziane, K.. University Of New Brunswick.; Canadá
Fil: Mazelle, C. X.. Centre National de la Recherche Scientifique; Francia
Fil: Simon Wedlund, C.. Austrian Academy Of Sciences;
Fil: Halekas, J. S.. University of Iowa; Estados Unidos
Fil: Hamza, A. M.. University Of New Brunswick.; Canadá
Fil: Bertucci, Cesar. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: Mitchell, D. L.. University of California at Berkeley; Estados Unidos
Fil: Espley, J. R.. No especifíca;
description We report fast sunward-propagating energetic proton field-aligned beams (FABs) observed about one Mars radius upstream of the Martian bow shock, recorded by the Solar Wind Ion Analyzer instrument on the MAVEN spacecraft. The velocity distributions show that all the beams have a bulk parallel speed ${v}_{B}=(1.35pm 0.21){V}_{S}$, exceeding the shock speed ${V}_{S}$. Several FABs are observed in the field-aligned region, linked to the quasi-parallel shock. The nearly synchronous variations of shock ${heta }_{Bn}$ values and beam speeds rule out specular reflection, suggesting a non-specular reflection mechanism. However, the slower Martian foreshock beam speeds remain unexplained compared to their terrestrial counterparts.
publishDate 2025
dc.date.none.fl_str_mv 2025-05
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/277512
Meziane, K.; Mazelle, C. X.; Simon Wedlund, C.; Halekas, J. S.; Hamza, A. M.; et al.; Field‐Aligned Proton Beams Upstream of the Martian Bow Shock: First Observations; American Geophysical Union; Geophysical Research Letters; 52; 11; 5-2025; 1-10
0094-8276
CONICET Digital
CONICET
url http://hdl.handle.net/11336/277512
identifier_str_mv Meziane, K.; Mazelle, C. X.; Simon Wedlund, C.; Halekas, J. S.; Hamza, A. M.; et al.; Field‐Aligned Proton Beams Upstream of the Martian Bow Shock: First Observations; American Geophysical Union; Geophysical Research Letters; 52; 11; 5-2025; 1-10
0094-8276
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2025GL115483
info:eu-repo/semantics/altIdentifier/doi/10.1029/2025GL115483
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Geophysical Union
publisher.none.fl_str_mv American Geophysical Union
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1852334938806812672
score 12.441415

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