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
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/101521
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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 Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
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article |
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publishedVersion |
dc.identifier.none.fl_str_mv |
http://sedici.unlp.edu.ar/handle/10915/101521 |
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dc.language.none.fl_str_mv |
eng |
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eng |
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