Colliding-wind binary systems: diffusive shock acceleration and non-thermal emission

Autores
Pittard, J. M.; Vila, Gabriela Soledad; Romero, Gustavo Esteban
Año de publicación
2020
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present a model for the non-thermal emission from a colliding-wind binary. Relativistic protons and electrons are assumed to be accelerated through diffusive shock acceleration (DSA) at the global shocks bounding the wind?wind collision region. The non-linear effects of the backreaction due to the cosmic ray pressure on the particle acceleration process and the cooling of the non-thermal particles as they flow downstream from the shocks are included. We explore how the non-thermal particle distribution and the keV−GeV emission changes with the stellar separation and the viewing angle of the system, and with the momentum ratio of the winds. We confirm earlier findings that DSA is very efficient when magnetic field amplification is not included, leading to significantly modified shocks. We also find that the non-thermal flux scales with the binary separation in a complicated way and that the anisotropic inverse Compton emission shows only a moderate variation with viewing angle due to the spatial extent of the wind?wind collision.
Fil: Pittard, J. M.. School Of Physics And Astronomy; Reino Unido
Fil: Vila, Gabriela Soledad. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
Fil: Romero, Gustavo Esteban. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
Materia
binaries: general
gamma-rays: stars
radiation mechanisms: nonthermal
stars: early-type
stars: winds, outflows
stars: Wolf-Rayet
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:11336/121351
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Colliding-wind binary systems: diffusive shock acceleration and non-thermal emissionPittard, J. M.Vila, Gabriela SoledadRomero, Gustavo Estebanbinaries: generalgamma-rays: starsradiation mechanisms: nonthermalstars: early-typestars: winds, outflowsstars: Wolf-Rayethttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present a model for the non-thermal emission from a colliding-wind binary. Relativistic protons and electrons are assumed to be accelerated through diffusive shock acceleration (DSA) at the global shocks bounding the wind?wind collision region. The non-linear effects of the backreaction due to the cosmic ray pressure on the particle acceleration process and the cooling of the non-thermal particles as they flow downstream from the shocks are included. We explore how the non-thermal particle distribution and the keV−GeV emission changes with the stellar separation and the viewing angle of the system, and with the momentum ratio of the winds. We confirm earlier findings that DSA is very efficient when magnetic field amplification is not included, leading to significantly modified shocks. We also find that the non-thermal flux scales with the binary separation in a complicated way and that the anisotropic inverse Compton emission shows only a moderate variation with viewing angle due to the spatial extent of the wind?wind collision.Fil: Pittard, J. M.. School Of Physics And Astronomy; Reino UnidoFil: Vila, Gabriela Soledad. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; ArgentinaFil: Romero, Gustavo Esteban. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; ArgentinaWiley Blackwell Publishing, Inc2020-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/121351Pittard, J. M.; Vila, Gabriela Soledad; Romero, Gustavo Esteban; Colliding-wind binary systems: diffusive shock acceleration and non-thermal emission; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 495; 2; 6-2020; 2205-22210035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article/495/2/2205/5824173info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/staa1099info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:18:51Zoai:ri.conicet.gov.ar:11336/121351instacron: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:34982025-09-29 10:18:51.681CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Colliding-wind binary systems: diffusive shock acceleration and non-thermal emission
title Colliding-wind binary systems: diffusive shock acceleration and non-thermal emission
spellingShingle Colliding-wind binary systems: diffusive shock acceleration and non-thermal emission
Pittard, J. M.
binaries: general
gamma-rays: stars
radiation mechanisms: nonthermal
stars: early-type
stars: winds, outflows
stars: Wolf-Rayet
title_short Colliding-wind binary systems: diffusive shock acceleration and non-thermal emission
title_full Colliding-wind binary systems: diffusive shock acceleration and non-thermal emission
title_fullStr Colliding-wind binary systems: diffusive shock acceleration and non-thermal emission
title_full_unstemmed Colliding-wind binary systems: diffusive shock acceleration and non-thermal emission
title_sort Colliding-wind binary systems: diffusive shock acceleration and non-thermal emission
dc.creator.none.fl_str_mv Pittard, J. M.
Vila, Gabriela Soledad
Romero, Gustavo Esteban
author Pittard, J. M.
author_facet Pittard, J. M.
Vila, Gabriela Soledad
Romero, Gustavo Esteban
author_role author
author2 Vila, Gabriela Soledad
Romero, Gustavo Esteban
author2_role author
author
dc.subject.none.fl_str_mv binaries: general
gamma-rays: stars
radiation mechanisms: nonthermal
stars: early-type
stars: winds, outflows
stars: Wolf-Rayet
topic binaries: general
gamma-rays: stars
radiation mechanisms: nonthermal
stars: early-type
stars: winds, outflows
stars: Wolf-Rayet
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 present a model for the non-thermal emission from a colliding-wind binary. Relativistic protons and electrons are assumed to be accelerated through diffusive shock acceleration (DSA) at the global shocks bounding the wind?wind collision region. The non-linear effects of the backreaction due to the cosmic ray pressure on the particle acceleration process and the cooling of the non-thermal particles as they flow downstream from the shocks are included. We explore how the non-thermal particle distribution and the keV−GeV emission changes with the stellar separation and the viewing angle of the system, and with the momentum ratio of the winds. We confirm earlier findings that DSA is very efficient when magnetic field amplification is not included, leading to significantly modified shocks. We also find that the non-thermal flux scales with the binary separation in a complicated way and that the anisotropic inverse Compton emission shows only a moderate variation with viewing angle due to the spatial extent of the wind?wind collision.
Fil: Pittard, J. M.. School Of Physics And Astronomy; Reino Unido
Fil: Vila, Gabriela Soledad. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
Fil: Romero, Gustavo Esteban. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
description We present a model for the non-thermal emission from a colliding-wind binary. Relativistic protons and electrons are assumed to be accelerated through diffusive shock acceleration (DSA) at the global shocks bounding the wind?wind collision region. The non-linear effects of the backreaction due to the cosmic ray pressure on the particle acceleration process and the cooling of the non-thermal particles as they flow downstream from the shocks are included. We explore how the non-thermal particle distribution and the keV−GeV emission changes with the stellar separation and the viewing angle of the system, and with the momentum ratio of the winds. We confirm earlier findings that DSA is very efficient when magnetic field amplification is not included, leading to significantly modified shocks. We also find that the non-thermal flux scales with the binary separation in a complicated way and that the anisotropic inverse Compton emission shows only a moderate variation with viewing angle due to the spatial extent of the wind?wind collision.
publishDate 2020
dc.date.none.fl_str_mv 2020-06
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/11336/121351
Pittard, J. M.; Vila, Gabriela Soledad; Romero, Gustavo Esteban; Colliding-wind binary systems: diffusive shock acceleration and non-thermal emission; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 495; 2; 6-2020; 2205-2221
0035-8711
CONICET Digital
CONICET
url http://hdl.handle.net/11336/121351
identifier_str_mv Pittard, J. M.; Vila, Gabriela Soledad; Romero, Gustavo Esteban; Colliding-wind binary systems: diffusive shock acceleration and non-thermal emission; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 495; 2; 6-2020; 2205-2221
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/url/https://academic.oup.com/mnras/article/495/2/2205/5824173
info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/staa1099
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 13.070432

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