Normal modes in magnetized two-fluid spin quantum plasmas

Autores
Gomez, Daniel Osvaldo; Kandus, Alejandra
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We extend the classical two-fluid magnetohydrodynamic (MHD) formalism to include quantum effects such as electron Fermi pressure, Bohm pressure, and spin couplings. At scales smaller than the electron skin-depth, the Hall effect and electron inertia must be taken into account, and can overlap with the quantum effects. We write down the full set of two-fluid quantumMHD(QMHD)and analyse the relative importance ofthese effects in the high-density environments of neutron star atmospheres and white dwarf interiors, finding that for a broad range of parameters all these effects are operative. Of all spin interactions we analyse only the spin-magnetic coupling, as it is linear in h(stroke) and consequently it is the strongest spin effect. We re-obtain the classical two-fluidMHD dispersion relations corresponding to the magnetosonic and Alfvén modes,modified by quantum effects. In the zero-spin case, for propagation parallel to the magnetic field, we find that the frequency of the fast mode is due to quantum effects modified by electron inertia, while the frequency of the Alfvén-slow sector has no quantum corrections. For perpendicular propagation, the fast-mode frequency is the same as for the parallel propagation plus a correction due only to classical two-fluid effects. When spin is considered, a whistler mode appears, which is due to two-fluid effects plus spin-magnetic interaction. There are no modifications due to spin for parallel propagation of magnetosonic and Alfvén waves, while for perpendicular propagation a dispersive term due to spin arises in the two-fluid expression for the fast magnetosonic mode.
Fil: Gomez, Daniel Osvaldo. Consejo Nacional de Investigaciónes 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: Kandus, Alejandra. Universidade Estadual de Santa Cruz; Brasil
Materia
MHD
PLASMAS
STARS: NEUTRON
WHITE DWARFS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/86355
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/86355
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Normal modes in magnetized two-fluid spin quantum plasmasGomez, Daniel OsvaldoKandus, AlejandraMHDPLASMASSTARS: NEUTRONWHITE DWARFShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We extend the classical two-fluid magnetohydrodynamic (MHD) formalism to include quantum effects such as electron Fermi pressure, Bohm pressure, and spin couplings. At scales smaller than the electron skin-depth, the Hall effect and electron inertia must be taken into account, and can overlap with the quantum effects. We write down the full set of two-fluid quantumMHD(QMHD)and analyse the relative importance ofthese effects in the high-density environments of neutron star atmospheres and white dwarf interiors, finding that for a broad range of parameters all these effects are operative. Of all spin interactions we analyse only the spin-magnetic coupling, as it is linear in h(stroke) and consequently it is the strongest spin effect. We re-obtain the classical two-fluidMHD dispersion relations corresponding to the magnetosonic and Alfvén modes,modified by quantum effects. In the zero-spin case, for propagation parallel to the magnetic field, we find that the frequency of the fast mode is due to quantum effects modified by electron inertia, while the frequency of the Alfvén-slow sector has no quantum corrections. For perpendicular propagation, the fast-mode frequency is the same as for the parallel propagation plus a correction due only to classical two-fluid effects. When spin is considered, a whistler mode appears, which is due to two-fluid effects plus spin-magnetic interaction. There are no modifications due to spin for parallel propagation of magnetosonic and Alfvén waves, while for perpendicular propagation a dispersive term due to spin arises in the two-fluid expression for the fast magnetosonic mode.Fil: Gomez, Daniel Osvaldo. Consejo Nacional de Investigaciónes 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: Kandus, Alejandra. Universidade Estadual de Santa Cruz; BrasilWiley Blackwell Publishing, Inc2018-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/86355Gomez, Daniel Osvaldo; Kandus, Alejandra; Normal modes in magnetized two-fluid spin quantum plasmas; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 481; 3; 12-2018; 3988-39990035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/sty2537info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-08-25T14:47:58Zoai:ri.conicet.gov.ar:11336/86355instacron: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:34982026-08-25 14:47:59.293CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Normal modes in magnetized two-fluid spin quantum plasmas
title Normal modes in magnetized two-fluid spin quantum plasmas
spellingShingle Normal modes in magnetized two-fluid spin quantum plasmas
Gomez, Daniel Osvaldo
MHD
PLASMAS
STARS: NEUTRON
WHITE DWARFS
title_short Normal modes in magnetized two-fluid spin quantum plasmas
title_full Normal modes in magnetized two-fluid spin quantum plasmas
title_fullStr Normal modes in magnetized two-fluid spin quantum plasmas
title_full_unstemmed Normal modes in magnetized two-fluid spin quantum plasmas
title_sort Normal modes in magnetized two-fluid spin quantum plasmas
dc.creator.none.fl_str_mv Gomez, Daniel Osvaldo
Kandus, Alejandra
author Gomez, Daniel Osvaldo
author_facet Gomez, Daniel Osvaldo
Kandus, Alejandra
author_role author
author2 Kandus, Alejandra
author2_role author
dc.subject.none.fl_str_mv MHD
PLASMAS
STARS: NEUTRON
WHITE DWARFS
topic MHD
PLASMAS
STARS: NEUTRON
WHITE DWARFS
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 extend the classical two-fluid magnetohydrodynamic (MHD) formalism to include quantum effects such as electron Fermi pressure, Bohm pressure, and spin couplings. At scales smaller than the electron skin-depth, the Hall effect and electron inertia must be taken into account, and can overlap with the quantum effects. We write down the full set of two-fluid quantumMHD(QMHD)and analyse the relative importance ofthese effects in the high-density environments of neutron star atmospheres and white dwarf interiors, finding that for a broad range of parameters all these effects are operative. Of all spin interactions we analyse only the spin-magnetic coupling, as it is linear in h(stroke) and consequently it is the strongest spin effect. We re-obtain the classical two-fluidMHD dispersion relations corresponding to the magnetosonic and Alfvén modes,modified by quantum effects. In the zero-spin case, for propagation parallel to the magnetic field, we find that the frequency of the fast mode is due to quantum effects modified by electron inertia, while the frequency of the Alfvén-slow sector has no quantum corrections. For perpendicular propagation, the fast-mode frequency is the same as for the parallel propagation plus a correction due only to classical two-fluid effects. When spin is considered, a whistler mode appears, which is due to two-fluid effects plus spin-magnetic interaction. There are no modifications due to spin for parallel propagation of magnetosonic and Alfvén waves, while for perpendicular propagation a dispersive term due to spin arises in the two-fluid expression for the fast magnetosonic mode.
Fil: Gomez, Daniel Osvaldo. Consejo Nacional de Investigaciónes 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: Kandus, Alejandra. Universidade Estadual de Santa Cruz; Brasil
description We extend the classical two-fluid magnetohydrodynamic (MHD) formalism to include quantum effects such as electron Fermi pressure, Bohm pressure, and spin couplings. At scales smaller than the electron skin-depth, the Hall effect and electron inertia must be taken into account, and can overlap with the quantum effects. We write down the full set of two-fluid quantumMHD(QMHD)and analyse the relative importance ofthese effects in the high-density environments of neutron star atmospheres and white dwarf interiors, finding that for a broad range of parameters all these effects are operative. Of all spin interactions we analyse only the spin-magnetic coupling, as it is linear in h(stroke) and consequently it is the strongest spin effect. We re-obtain the classical two-fluidMHD dispersion relations corresponding to the magnetosonic and Alfvén modes,modified by quantum effects. In the zero-spin case, for propagation parallel to the magnetic field, we find that the frequency of the fast mode is due to quantum effects modified by electron inertia, while the frequency of the Alfvén-slow sector has no quantum corrections. For perpendicular propagation, the fast-mode frequency is the same as for the parallel propagation plus a correction due only to classical two-fluid effects. When spin is considered, a whistler mode appears, which is due to two-fluid effects plus spin-magnetic interaction. There are no modifications due to spin for parallel propagation of magnetosonic and Alfvén waves, while for perpendicular propagation a dispersive term due to spin arises in the two-fluid expression for the fast magnetosonic mode.
publishDate 2018
dc.date.none.fl_str_mv 2018-12
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/11336/86355
Gomez, Daniel Osvaldo; Kandus, Alejandra; Normal modes in magnetized two-fluid spin quantum plasmas; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 481; 3; 12-2018; 3988-3999
0035-8711
CONICET Digital
CONICET
url http://hdl.handle.net/11336/86355
identifier_str_mv Gomez, Daniel Osvaldo; Kandus, Alejandra; Normal modes in magnetized two-fluid spin quantum plasmas; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 481; 3; 12-2018; 3988-3999
0035-8711
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/sty2537
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
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
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score 13.265058

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