Gamma-ray binaries beyond one-zone models: an application to LS 5039

Autores
del Palacio, Santiago; Bosch-Ramon, Valentí; Romero, Gustavo Esteban
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Context. Several binary systems hosting massive stars present gamma-ray emission. In most of these systems, despite detailed observational information being available, the nature and the structure of the emitter are still poorly known. Aims. We investigate the validity of the so-called one-zone approximation for the high-energy emitter in binary systems hosting a massive star. In particular, the case of LS 5039 is considered. Methods. Assuming a point-like emitter at rest, the presence of a nearby massive star, and the observed MeV and GeV fluxes as a reference, a non-thermal leptonic model is systematically applied for different locations, magnetic fields, and non-radiative losses. This allows us to identify both the emitter configurations that are most compatible with observations and inconsistencies between model predictions and the available data. Results. In the case of LS 5039, the best parameter combination is fast non-radiative cooling and a low magnetic field. However, discrepancies appear when comparing the model results at the MeV and GeV energy ranges with the observed ?uxes. Predictions fail when the orbital motion is included in the analysis, because emitters and energy budgets that are too large are required. Values of X-ray and TeV fluxes that are too high are predicted in such a case, along half of the orbit. Conclusions. We show that the radiation in LS 5039 does not come from only one electron population, and the emitter is likely extended and inhomogeneous with a low magnetic field. We suggest that the emitter moves at relativistic velocities with Doppler boosting playing a significant role.
Fil: del Palacio, Santiago. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Cientifico Tecnológico la Plata; Argentina
Fil: Bosch-Ramon, Valentí. Universitat de Barcelona (IEEC-UB). Departament d’Astronomia i Meteorologia, Institut de Ciències del Cosmos (ICC) ; España
Fil: Romero, Gustavo Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Cientifico Tecnológico la Plata; Argentina
Materia
Massive stars
Binary systems
Gamma rays
LS 5039
Gamma-ray emission
X-ray binaries
Relativistic processes
Nonthermal mechanisms
Radiation mechanisms
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:11336/7086
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/7086
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Gamma-ray binaries beyond one-zone models: an application to LS 5039del Palacio, SantiagoBosch-Ramon, ValentíRomero, Gustavo EstebanMassive starsBinary systemsGamma raysLS 5039Gamma-ray emissionX-ray binariesRelativistic processesNonthermal mechanismsRadiation mechanismshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Context. Several binary systems hosting massive stars present gamma-ray emission. In most of these systems, despite detailed observational information being available, the nature and the structure of the emitter are still poorly known. Aims. We investigate the validity of the so-called one-zone approximation for the high-energy emitter in binary systems hosting a massive star. In particular, the case of LS 5039 is considered. Methods. Assuming a point-like emitter at rest, the presence of a nearby massive star, and the observed MeV and GeV fluxes as a reference, a non-thermal leptonic model is systematically applied for different locations, magnetic fields, and non-radiative losses. This allows us to identify both the emitter configurations that are most compatible with observations and inconsistencies between model predictions and the available data. Results. In the case of LS 5039, the best parameter combination is fast non-radiative cooling and a low magnetic field. However, discrepancies appear when comparing the model results at the MeV and GeV energy ranges with the observed ?uxes. Predictions fail when the orbital motion is included in the analysis, because emitters and energy budgets that are too large are required. Values of X-ray and TeV fluxes that are too high are predicted in such a case, along half of the orbit. Conclusions. We show that the radiation in LS 5039 does not come from only one electron population, and the emitter is likely extended and inhomogeneous with a low magnetic field. We suggest that the emitter moves at relativistic velocities with Doppler boosting playing a significant role.Fil: del Palacio, Santiago. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Cientifico Tecnológico la Plata; ArgentinaFil: Bosch-Ramon, Valentí. Universitat de Barcelona (IEEC-UB). Departament d’Astronomia i Meteorologia, Institut de Ciències del Cosmos (ICC) ; EspañaFil: Romero, Gustavo Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Cientifico Tecnológico la Plata; ArgentinaEdp Sciences2015-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/7086del Palacio, Santiago; Bosch-Ramon, Valentí; Romero, Gustavo Esteban; Gamma-ray binaries beyond one-zone models: an application to LS 5039; Edp Sciences; Astronomy And Astrophysics; 575; A112; 3-2015; 130004-6361enginfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201424713info:eu-repo/semantics/altIdentifier/url/http://www.aanda.org/articles/aa/abs/2015/03/aa24713-14/aa24713-14.htmlinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:02:11Zoai:ri.conicet.gov.ar:11336/7086instacron: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:34982025-10-15 15:02:11.769CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Gamma-ray binaries beyond one-zone models: an application to LS 5039
title Gamma-ray binaries beyond one-zone models: an application to LS 5039
spellingShingle Gamma-ray binaries beyond one-zone models: an application to LS 5039
del Palacio, Santiago
Massive stars
Binary systems
Gamma rays
LS 5039
Gamma-ray emission
X-ray binaries
Relativistic processes
Nonthermal mechanisms
Radiation mechanisms
title_short Gamma-ray binaries beyond one-zone models: an application to LS 5039
title_full Gamma-ray binaries beyond one-zone models: an application to LS 5039
title_fullStr Gamma-ray binaries beyond one-zone models: an application to LS 5039
title_full_unstemmed Gamma-ray binaries beyond one-zone models: an application to LS 5039
title_sort Gamma-ray binaries beyond one-zone models: an application to LS 5039
dc.creator.none.fl_str_mv del Palacio, Santiago
Bosch-Ramon, Valentí
Romero, Gustavo Esteban
author del Palacio, Santiago
author_facet del Palacio, Santiago
Bosch-Ramon, Valentí
Romero, Gustavo Esteban
author_role author
author2 Bosch-Ramon, Valentí
Romero, Gustavo Esteban
author2_role author
author
dc.subject.none.fl_str_mv Massive stars
Binary systems
Gamma rays
LS 5039
Gamma-ray emission
X-ray binaries
Relativistic processes
Nonthermal mechanisms
Radiation mechanisms
topic Massive stars
Binary systems
Gamma rays
LS 5039
Gamma-ray emission
X-ray binaries
Relativistic processes
Nonthermal mechanisms
Radiation mechanisms
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Context. Several binary systems hosting massive stars present gamma-ray emission. In most of these systems, despite detailed observational information being available, the nature and the structure of the emitter are still poorly known. Aims. We investigate the validity of the so-called one-zone approximation for the high-energy emitter in binary systems hosting a massive star. In particular, the case of LS 5039 is considered. Methods. Assuming a point-like emitter at rest, the presence of a nearby massive star, and the observed MeV and GeV fluxes as a reference, a non-thermal leptonic model is systematically applied for different locations, magnetic fields, and non-radiative losses. This allows us to identify both the emitter configurations that are most compatible with observations and inconsistencies between model predictions and the available data. Results. In the case of LS 5039, the best parameter combination is fast non-radiative cooling and a low magnetic field. However, discrepancies appear when comparing the model results at the MeV and GeV energy ranges with the observed ?uxes. Predictions fail when the orbital motion is included in the analysis, because emitters and energy budgets that are too large are required. Values of X-ray and TeV fluxes that are too high are predicted in such a case, along half of the orbit. Conclusions. We show that the radiation in LS 5039 does not come from only one electron population, and the emitter is likely extended and inhomogeneous with a low magnetic field. We suggest that the emitter moves at relativistic velocities with Doppler boosting playing a significant role.
Fil: del Palacio, Santiago. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Cientifico Tecnológico la Plata; Argentina
Fil: Bosch-Ramon, Valentí. Universitat de Barcelona (IEEC-UB). Departament d’Astronomia i Meteorologia, Institut de Ciències del Cosmos (ICC) ; España
Fil: Romero, Gustavo Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Cientifico Tecnológico la Plata; Argentina
description Context. Several binary systems hosting massive stars present gamma-ray emission. In most of these systems, despite detailed observational information being available, the nature and the structure of the emitter are still poorly known. Aims. We investigate the validity of the so-called one-zone approximation for the high-energy emitter in binary systems hosting a massive star. In particular, the case of LS 5039 is considered. Methods. Assuming a point-like emitter at rest, the presence of a nearby massive star, and the observed MeV and GeV fluxes as a reference, a non-thermal leptonic model is systematically applied for different locations, magnetic fields, and non-radiative losses. This allows us to identify both the emitter configurations that are most compatible with observations and inconsistencies between model predictions and the available data. Results. In the case of LS 5039, the best parameter combination is fast non-radiative cooling and a low magnetic field. However, discrepancies appear when comparing the model results at the MeV and GeV energy ranges with the observed ?uxes. Predictions fail when the orbital motion is included in the analysis, because emitters and energy budgets that are too large are required. Values of X-ray and TeV fluxes that are too high are predicted in such a case, along half of the orbit. Conclusions. We show that the radiation in LS 5039 does not come from only one electron population, and the emitter is likely extended and inhomogeneous with a low magnetic field. We suggest that the emitter moves at relativistic velocities with Doppler boosting playing a significant role.
publishDate 2015
dc.date.none.fl_str_mv 2015-03
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/11336/7086
del Palacio, Santiago; Bosch-Ramon, Valentí; Romero, Gustavo Esteban; Gamma-ray binaries beyond one-zone models: an application to LS 5039; Edp Sciences; Astronomy And Astrophysics; 575; A112; 3-2015; 13
0004-6361
url http://hdl.handle.net/11336/7086
identifier_str_mv del Palacio, Santiago; Bosch-Ramon, Valentí; Romero, Gustavo Esteban; Gamma-ray binaries beyond one-zone models: an application to LS 5039; Edp Sciences; Astronomy And Astrophysics; 575; A112; 3-2015; 13
0004-6361
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201424713
info:eu-repo/semantics/altIdentifier/url/http://www.aanda.org/articles/aa/abs/2015/03/aa24713-14/aa24713-14.html
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 Edp Sciences
publisher.none.fl_str_mv Edp Sciences
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 12.891075

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