Coronal origin of the polarization of the high-energy emission of Cygnus X-1

Autores
Romero, Gustavo Esteban; Vieyro, Florencia Laura; Chaty, S.
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Context. Cygnus X-1 is the candidate with the highest probability of containing a black hole among the X-ray binary systems in the Galaxy. It is also by far the most often studied of these objects. Recently, the International Gamma-Ray Astrophysics Laboratory Imager on board the Integral satellite (INTEGRAL/IBIS) detected strong polarization in the high-energy radiation of this source, between 400 keV and 2 MeV. This radiation has been attributed to a jet launched by the black hole. Aims. We consider whether the corona around the black hole might be the site of production of the polarized emission instead of the jet. Methods. We studied self-consistently the injection of nonthermal particles in the hot, magnetized plasma around the black hole. Results. We show that both the high-energy spectrum and polarization of Cygnus X-1 in the low-hard state can originate in the corona, without needing to invoke a jet. We estimate the degree of polarization in the intermediate state, where there is no jet, to provide a tool to test our model. Conclusions. Contrary to the commonly accepted view, the jet might not be the source of the MeV polarized tail in the spectrum of Cygnus X-1.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto Argentino de Radioastronomía
Materia
Ciencias Astronómicas
X-ray binaries
Radiation mechanisms
Gamma rays
Polarization
Cygnus -1
Stars
Non-thermal mechanisms
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/101521

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network_name_str SEDICI (UNLP)
spelling Coronal origin of the polarization of the high-energy emission of Cygnus X-1Romero, Gustavo EstebanVieyro, Florencia LauraChaty, S.Ciencias AstronómicasX-ray binariesRadiation mechanismsGamma raysPolarizationCygnus -1StarsNon-thermal mechanismsContext. Cygnus X-1 is the candidate with the highest probability of containing a black hole among the X-ray binary systems in the Galaxy. It is also by far the most often studied of these objects. Recently, the International Gamma-Ray Astrophysics Laboratory Imager on board the Integral satellite (INTEGRAL/IBIS) detected strong polarization in the high-energy radiation of this source, between 400 keV and 2 MeV. This radiation has been attributed to a jet launched by the black hole. Aims. We consider whether the corona around the black hole might be the site of production of the polarized emission instead of the jet. Methods. We studied self-consistently the injection of nonthermal particles in the hot, magnetized plasma around the black hole. Results. We show that both the high-energy spectrum and polarization of Cygnus X-1 in the low-hard state can originate in the corona, without needing to invoke a jet. We estimate the degree of polarization in the intermediate state, where there is no jet, to provide a tool to test our model. Conclusions. Contrary to the commonly accepted view, the jet might not be the source of the MeV polarized tail in the spectrum of Cygnus X-1.Facultad de Ciencias Astronómicas y GeofísicasInstituto Argentino de Radioastronomía2014-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1-4http://sedici.unlp.edu.ar/handle/10915/101521enginfo:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/5835info:eu-repo/semantics/altIdentifier/url/http://www.aanda.org/articles/aa/abs/2014/02/aa23316-13/aa23316-13.htmlinfo:eu-repo/semantics/altIdentifier/url/http://arxiv.org/abs/1402.0524v1info:eu-repo/semantics/altIdentifier/issn/0004-6361info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201323316info:eu-repo/semantics/altIdentifier/arxiv/1402.0524v1info:eu-repo/semantics/altIdentifier/hdl/11336/5835info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:20:15Zoai:sedici.unlp.edu.ar:10915/101521Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:20:16.106SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Coronal origin of the polarization of the high-energy emission of Cygnus X-1
title Coronal origin of the polarization of the high-energy emission of Cygnus X-1
spellingShingle Coronal origin of the polarization of the high-energy emission of Cygnus X-1
Romero, Gustavo Esteban
Ciencias Astronómicas
X-ray binaries
Radiation mechanisms
Gamma rays
Polarization
Cygnus -1
Stars
Non-thermal mechanisms
title_short Coronal origin of the polarization of the high-energy emission of Cygnus X-1
title_full Coronal origin of the polarization of the high-energy emission of Cygnus X-1
title_fullStr Coronal origin of the polarization of the high-energy emission of Cygnus X-1
title_full_unstemmed Coronal origin of the polarization of the high-energy emission of Cygnus X-1
title_sort Coronal origin of the polarization of the high-energy emission of Cygnus X-1
dc.creator.none.fl_str_mv Romero, Gustavo Esteban
Vieyro, Florencia Laura
Chaty, S.
author Romero, Gustavo Esteban
author_facet Romero, Gustavo Esteban
Vieyro, Florencia Laura
Chaty, S.
author_role author
author2 Vieyro, Florencia Laura
Chaty, S.
author2_role author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
X-ray binaries
Radiation mechanisms
Gamma rays
Polarization
Cygnus -1
Stars
Non-thermal mechanisms
topic Ciencias Astronómicas
X-ray binaries
Radiation mechanisms
Gamma rays
Polarization
Cygnus -1
Stars
Non-thermal mechanisms
dc.description.none.fl_txt_mv Context. Cygnus X-1 is the candidate with the highest probability of containing a black hole among the X-ray binary systems in the Galaxy. It is also by far the most often studied of these objects. Recently, the International Gamma-Ray Astrophysics Laboratory Imager on board the Integral satellite (INTEGRAL/IBIS) detected strong polarization in the high-energy radiation of this source, between 400 keV and 2 MeV. This radiation has been attributed to a jet launched by the black hole. Aims. We consider whether the corona around the black hole might be the site of production of the polarized emission instead of the jet. Methods. We studied self-consistently the injection of nonthermal particles in the hot, magnetized plasma around the black hole. Results. We show that both the high-energy spectrum and polarization of Cygnus X-1 in the low-hard state can originate in the corona, without needing to invoke a jet. We estimate the degree of polarization in the intermediate state, where there is no jet, to provide a tool to test our model. Conclusions. Contrary to the commonly accepted view, the jet might not be the source of the MeV polarized tail in the spectrum of Cygnus X-1.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto Argentino de Radioastronomía
description Context. Cygnus X-1 is the candidate with the highest probability of containing a black hole among the X-ray binary systems in the Galaxy. It is also by far the most often studied of these objects. Recently, the International Gamma-Ray Astrophysics Laboratory Imager on board the Integral satellite (INTEGRAL/IBIS) detected strong polarization in the high-energy radiation of this source, between 400 keV and 2 MeV. This radiation has been attributed to a jet launched by the black hole. Aims. We consider whether the corona around the black hole might be the site of production of the polarized emission instead of the jet. Methods. We studied self-consistently the injection of nonthermal particles in the hot, magnetized plasma around the black hole. Results. We show that both the high-energy spectrum and polarization of Cygnus X-1 in the low-hard state can originate in the corona, without needing to invoke a jet. We estimate the degree of polarization in the intermediate state, where there is no jet, to provide a tool to test our model. Conclusions. Contrary to the commonly accepted view, the jet might not be the source of the MeV polarized tail in the spectrum of Cygnus X-1.
publishDate 2014
dc.date.none.fl_str_mv 2014-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/101521
url http://sedici.unlp.edu.ar/handle/10915/101521
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/5835
info:eu-repo/semantics/altIdentifier/url/http://www.aanda.org/articles/aa/abs/2014/02/aa23316-13/aa23316-13.html
info:eu-repo/semantics/altIdentifier/url/http://arxiv.org/abs/1402.0524v1
info:eu-repo/semantics/altIdentifier/issn/0004-6361
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201323316
info:eu-repo/semantics/altIdentifier/arxiv/1402.0524v1
info:eu-repo/semantics/altIdentifier/hdl/11336/5835
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
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rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
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