High-energy gamma-ray production in microquasars

Autores
Christiansen, Hugo; Romero, Gustavo E.; Orellana, Mariana Dominga
Año de publicación
2007
Idioma
español castellano
Tipo de recurso
artículo
Estado
versión aceptada
Descripción
Fil: Christiansen, Hugo. Universidade Estadual Do Ceara; Brasil
Fil: Romero, Gustavo E. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Romero, Gustavo E. Comisión de Investigaciones Científicas; Argentina
Fil: Romero, Gustavo E. Instituto Argentino de Radioastronomia; Argentina
Fil: Orellana, Mariana D. Universidad Nacional de Río Negro; Argentina
Fil: Orellana, Mariana D. Comisión de Investigaciones Científicas; Argentina
Fil: Orellana, Mariana D. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Orellana, Mariana D. Instituto Argentino de Radioastronomía; Argentina
A hadronic model for gamma-ray production in microquasars is presented. Microquasars are galactic binary systems with jets, which have, presumably, hadronic components. We consider a microquasar formed by a neutron star that accretes matter from the equatorial wind of a Be primary star. The collision between the jet, emitted by the compact object, and the dense equatorial disk of the companion massive star is responsible for the gamma-ray production. Gamma-rays result from the decay of neutral pions produced in relativistic pp interactions arising from this collision all along the orbit. Assuming a simple, positional independent set of parameters, our calculations are consistent with a peak of gamma-ray flux at the periastron passage with a secondary maximum near apastron. Under this assumption, gamma-ray signals would be in contrast with the radio/X-ray outbursts which peak clearly after periastron. We finally calculate the opacity of the ambient photon field to the propagation of the gamma-rays. The spectral energy distribution appears strongly attenuated in a wide band (50 GeV - 50 TeV) due to local absorption. These spectral features should be detectable by an instrument like MAGIC through exposures integrated along several periastron passages.
Materia
Ciencias Físicas
Microquasars
Gamma rays
Hadronic Models
Binary Systems
Ciencias Físicas
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
RID-UNRN (UNRN)
Institución
Universidad Nacional de Río Negro
OAI Identificador
oai:rid.unrn.edu.ar:20.500.12049/2826

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network_name_str RID-UNRN (UNRN)
spelling High-energy gamma-ray production in microquasarsChristiansen, HugoRomero, Gustavo E.Orellana, Mariana DomingaCiencias FísicasMicroquasarsGamma raysHadronic ModelsBinary SystemsCiencias FísicasFil: Christiansen, Hugo. Universidade Estadual Do Ceara; BrasilFil: Romero, Gustavo E. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Romero, Gustavo E. Comisión de Investigaciones Científicas; ArgentinaFil: Romero, Gustavo E. Instituto Argentino de Radioastronomia; ArgentinaFil: Orellana, Mariana D. Universidad Nacional de Río Negro; ArgentinaFil: Orellana, Mariana D. Comisión de Investigaciones Científicas; ArgentinaFil: Orellana, Mariana D. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: Orellana, Mariana D. Instituto Argentino de Radioastronomía; ArgentinaA hadronic model for gamma-ray production in microquasars is presented. Microquasars are galactic binary systems with jets, which have, presumably, hadronic components. We consider a microquasar formed by a neutron star that accretes matter from the equatorial wind of a Be primary star. The collision between the jet, emitted by the compact object, and the dense equatorial disk of the companion massive star is responsible for the gamma-ray production. Gamma-rays result from the decay of neutral pions produced in relativistic pp interactions arising from this collision all along the orbit. Assuming a simple, positional independent set of parameters, our calculations are consistent with a peak of gamma-ray flux at the periastron passage with a secondary maximum near apastron. Under this assumption, gamma-ray signals would be in contrast with the radio/X-ray outbursts which peak clearly after periastron. We finally calculate the opacity of the ambient photon field to the propagation of the gamma-rays. The spectral energy distribution appears strongly attenuated in a wide band (50 GeV - 50 TeV) due to local absorption. These spectral features should be detectable by an instrument like MAGIC through exposures integrated along several periastron passages.2007-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfChristiansen, Hugo., Romero, Gustavo E. & Orellana, Mariana D. (2007). High-energy gamma-ray production in microquasars. Sociedad Brasileira Fisica. Brazilian Journal Of Physics; 37; 2B; 545-5481678-4448http://ref.scielo.org/gsfhzhhttp://hdl.handle.net/11336/22323https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2826http://dx.doi.org/10.1590/S0103-97332007000400012spa37Brazilian Journal Of Physicsinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/4.0/reponame:RID-UNRN (UNRN)instname:Universidad Nacional de Río Negro2025-09-29T14:29:05Zoai:rid.unrn.edu.ar:20.500.12049/2826instacron:UNRNInstitucionalhttps://rid.unrn.edu.ar/jspui/Universidad públicaNo correspondehttps://rid.unrn.edu.ar/oai/snrdrid@unrn.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:43692025-09-29 14:29:05.337RID-UNRN (UNRN) - Universidad Nacional de Río Negrofalse
dc.title.none.fl_str_mv High-energy gamma-ray production in microquasars
title High-energy gamma-ray production in microquasars
spellingShingle High-energy gamma-ray production in microquasars
Christiansen, Hugo
Ciencias Físicas
Microquasars
Gamma rays
Hadronic Models
Binary Systems
Ciencias Físicas
title_short High-energy gamma-ray production in microquasars
title_full High-energy gamma-ray production in microquasars
title_fullStr High-energy gamma-ray production in microquasars
title_full_unstemmed High-energy gamma-ray production in microquasars
title_sort High-energy gamma-ray production in microquasars
dc.creator.none.fl_str_mv Christiansen, Hugo
Romero, Gustavo E.
Orellana, Mariana Dominga
author Christiansen, Hugo
author_facet Christiansen, Hugo
Romero, Gustavo E.
Orellana, Mariana Dominga
author_role author
author2 Romero, Gustavo E.
Orellana, Mariana Dominga
author2_role author
author
dc.subject.none.fl_str_mv Ciencias Físicas
Microquasars
Gamma rays
Hadronic Models
Binary Systems
Ciencias Físicas
topic Ciencias Físicas
Microquasars
Gamma rays
Hadronic Models
Binary Systems
Ciencias Físicas
dc.description.none.fl_txt_mv Fil: Christiansen, Hugo. Universidade Estadual Do Ceara; Brasil
Fil: Romero, Gustavo E. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Romero, Gustavo E. Comisión de Investigaciones Científicas; Argentina
Fil: Romero, Gustavo E. Instituto Argentino de Radioastronomia; Argentina
Fil: Orellana, Mariana D. Universidad Nacional de Río Negro; Argentina
Fil: Orellana, Mariana D. Comisión de Investigaciones Científicas; Argentina
Fil: Orellana, Mariana D. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Fil: Orellana, Mariana D. Instituto Argentino de Radioastronomía; Argentina
A hadronic model for gamma-ray production in microquasars is presented. Microquasars are galactic binary systems with jets, which have, presumably, hadronic components. We consider a microquasar formed by a neutron star that accretes matter from the equatorial wind of a Be primary star. The collision between the jet, emitted by the compact object, and the dense equatorial disk of the companion massive star is responsible for the gamma-ray production. Gamma-rays result from the decay of neutral pions produced in relativistic pp interactions arising from this collision all along the orbit. Assuming a simple, positional independent set of parameters, our calculations are consistent with a peak of gamma-ray flux at the periastron passage with a secondary maximum near apastron. Under this assumption, gamma-ray signals would be in contrast with the radio/X-ray outbursts which peak clearly after periastron. We finally calculate the opacity of the ambient photon field to the propagation of the gamma-rays. The spectral energy distribution appears strongly attenuated in a wide band (50 GeV - 50 TeV) due to local absorption. These spectral features should be detectable by an instrument like MAGIC through exposures integrated along several periastron passages.
description Fil: Christiansen, Hugo. Universidade Estadual Do Ceara; Brasil
publishDate 2007
dc.date.none.fl_str_mv 2007-06
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv Christiansen, Hugo., Romero, Gustavo E. & Orellana, Mariana D. (2007). High-energy gamma-ray production in microquasars. Sociedad Brasileira Fisica. Brazilian Journal Of Physics; 37; 2B; 545-548
1678-4448
http://ref.scielo.org/gsfhzh
http://hdl.handle.net/11336/22323
https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2826
http://dx.doi.org/10.1590/S0103-97332007000400012
identifier_str_mv Christiansen, Hugo., Romero, Gustavo E. & Orellana, Mariana D. (2007). High-energy gamma-ray production in microquasars. Sociedad Brasileira Fisica. Brazilian Journal Of Physics; 37; 2B; 545-548
1678-4448
url http://ref.scielo.org/gsfhzh
http://hdl.handle.net/11336/22323
https://rid.unrn.edu.ar/jspui/handle/20.500.12049/2826
http://dx.doi.org/10.1590/S0103-97332007000400012
dc.language.none.fl_str_mv spa
language spa
dc.relation.none.fl_str_mv 37
Brazilian Journal Of Physics
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/4.0/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/4.0/
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:RID-UNRN (UNRN)
instname:Universidad Nacional de Río Negro
reponame_str RID-UNRN (UNRN)
collection RID-UNRN (UNRN)
instname_str Universidad Nacional de Río Negro
repository.name.fl_str_mv RID-UNRN (UNRN) - Universidad Nacional de Río Negro
repository.mail.fl_str_mv rid@unrn.edu.ar
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score 12.559606