Modeling the polarization of high-energy radiation from accreting black holes: A case study of XTE J1118+480

Autores
Vieyro, Florencia Laura; Romero, Gustavo Esteban; Chaty, S.
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Context. The high-energy emission (400 keV-2 MeV) of Cygnus X-1, which is the best-studied Galactic black hole, was recently found to be strongly polarized. The origin of this radiation is still unknown. Aims. We suggest that the emission is the result of non-thermal processes in the hot corona around the accreting compact object and study the polarization of high-energy radiation that is expected for black hole binaries. Methods. Two contributions to the total magnetic field were taken into account in our study: a small-scale random component related to the corona, and an ordered magnetic field associated with the accretion disk. The degree of polarization of gamma-ray emission for this particular geometry was estimated together with the angle of the polarization vector. Results. We obtain that the configuration of corona plus disk can account for the high degree of polarization of gamma-rays that are detected in galactic black holes and does not need to invoke a relativistic jet. We make specific predictions for sources in a low-hard state. In particular, the model is applied to the transient source XTE J1118+480. We show that if a new outburst of XTE J1118+480 is observed, then its gamma-ray polarization should be measurable by future instruments, such as ASTRO-H or the proposed ASTROGAM.
Fil: Vieyro, Florencia Laura. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - la Plata. Instituto Argentino de Radioastronomia; Argentina. Universidad Nacional de la Plata; Argentina
Fil: Romero, Gustavo Esteban. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - la Plata. Instituto Argentino de Radioastronomia; Argentina. Universidad Nacional de la Plata; Argentina
Fil: Chaty, S.. Institut Universitaire de France; Francia. Cea Saclay; Francia
Materia
GAMMA RAYS: GENERAL
POLARIZATION
STARS: INDIVIDUAL: XTE J1118+480
X-RAYS: BINARIES
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:11336/17475
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Modeling the polarization of high-energy radiation from accreting black holes: A case study of XTE J1118+480Vieyro, Florencia LauraRomero, Gustavo EstebanChaty, S.GAMMA RAYS: GENERALPOLARIZATIONSTARS: INDIVIDUAL: XTE J1118+480X-RAYS: BINARIEShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Context. The high-energy emission (400 keV-2 MeV) of Cygnus X-1, which is the best-studied Galactic black hole, was recently found to be strongly polarized. The origin of this radiation is still unknown. Aims. We suggest that the emission is the result of non-thermal processes in the hot corona around the accreting compact object and study the polarization of high-energy radiation that is expected for black hole binaries. Methods. Two contributions to the total magnetic field were taken into account in our study: a small-scale random component related to the corona, and an ordered magnetic field associated with the accretion disk. The degree of polarization of gamma-ray emission for this particular geometry was estimated together with the angle of the polarization vector. Results. We obtain that the configuration of corona plus disk can account for the high degree of polarization of gamma-rays that are detected in galactic black holes and does not need to invoke a relativistic jet. We make specific predictions for sources in a low-hard state. In particular, the model is applied to the transient source XTE J1118+480. We show that if a new outburst of XTE J1118+480 is observed, then its gamma-ray polarization should be measurable by future instruments, such as ASTRO-H or the proposed ASTROGAM.Fil: Vieyro, Florencia Laura. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - la Plata. Instituto Argentino de Radioastronomia; Argentina. Universidad Nacional de la Plata; ArgentinaFil: Romero, Gustavo Esteban. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - la Plata. Instituto Argentino de Radioastronomia; Argentina. Universidad Nacional de la Plata; ArgentinaFil: Chaty, S.. Institut Universitaire de France; Francia. Cea Saclay; FranciaEdp Sciences2016-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/17475Vieyro, Florencia Laura; Romero, Gustavo Esteban; Chaty, S.; Modeling the polarization of high-energy radiation from accreting black holes: A case study of XTE J1118+480; Edp Sciences; Astronomy And Astrophysics; 587; 3-2016; 1-7;630004-6361enginfo:eu-repo/semantics/altIdentifier/url/http://dx.doi.org/10.1051/0004-6361/201526587info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2016/03/aa26587-15/aa26587-15.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 Técnicas2025-10-15T15:42:31Zoai:ri.conicet.gov.ar:11336/17475instacron: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 15:42:31.927CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Modeling the polarization of high-energy radiation from accreting black holes: A case study of XTE J1118+480
title Modeling the polarization of high-energy radiation from accreting black holes: A case study of XTE J1118+480
spellingShingle Modeling the polarization of high-energy radiation from accreting black holes: A case study of XTE J1118+480
Vieyro, Florencia Laura
GAMMA RAYS: GENERAL
POLARIZATION
STARS: INDIVIDUAL: XTE J1118+480
X-RAYS: BINARIES
title_short Modeling the polarization of high-energy radiation from accreting black holes: A case study of XTE J1118+480
title_full Modeling the polarization of high-energy radiation from accreting black holes: A case study of XTE J1118+480
title_fullStr Modeling the polarization of high-energy radiation from accreting black holes: A case study of XTE J1118+480
title_full_unstemmed Modeling the polarization of high-energy radiation from accreting black holes: A case study of XTE J1118+480
title_sort Modeling the polarization of high-energy radiation from accreting black holes: A case study of XTE J1118+480
dc.creator.none.fl_str_mv Vieyro, Florencia Laura
Romero, Gustavo Esteban
Chaty, S.
author Vieyro, Florencia Laura
author_facet Vieyro, Florencia Laura
Romero, Gustavo Esteban
Chaty, S.
author_role author
author2 Romero, Gustavo Esteban
Chaty, S.
author2_role author
author
dc.subject.none.fl_str_mv GAMMA RAYS: GENERAL
POLARIZATION
STARS: INDIVIDUAL: XTE J1118+480
X-RAYS: BINARIES
topic GAMMA RAYS: GENERAL
POLARIZATION
STARS: INDIVIDUAL: XTE J1118+480
X-RAYS: BINARIES
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. The high-energy emission (400 keV-2 MeV) of Cygnus X-1, which is the best-studied Galactic black hole, was recently found to be strongly polarized. The origin of this radiation is still unknown. Aims. We suggest that the emission is the result of non-thermal processes in the hot corona around the accreting compact object and study the polarization of high-energy radiation that is expected for black hole binaries. Methods. Two contributions to the total magnetic field were taken into account in our study: a small-scale random component related to the corona, and an ordered magnetic field associated with the accretion disk. The degree of polarization of gamma-ray emission for this particular geometry was estimated together with the angle of the polarization vector. Results. We obtain that the configuration of corona plus disk can account for the high degree of polarization of gamma-rays that are detected in galactic black holes and does not need to invoke a relativistic jet. We make specific predictions for sources in a low-hard state. In particular, the model is applied to the transient source XTE J1118+480. We show that if a new outburst of XTE J1118+480 is observed, then its gamma-ray polarization should be measurable by future instruments, such as ASTRO-H or the proposed ASTROGAM.
Fil: Vieyro, Florencia Laura. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - la Plata. Instituto Argentino de Radioastronomia; Argentina. Universidad Nacional de la Plata; Argentina
Fil: Romero, Gustavo Esteban. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - la Plata. Instituto Argentino de Radioastronomia; Argentina. Universidad Nacional de la Plata; Argentina
Fil: Chaty, S.. Institut Universitaire de France; Francia. Cea Saclay; Francia
description Context. The high-energy emission (400 keV-2 MeV) of Cygnus X-1, which is the best-studied Galactic black hole, was recently found to be strongly polarized. The origin of this radiation is still unknown. Aims. We suggest that the emission is the result of non-thermal processes in the hot corona around the accreting compact object and study the polarization of high-energy radiation that is expected for black hole binaries. Methods. Two contributions to the total magnetic field were taken into account in our study: a small-scale random component related to the corona, and an ordered magnetic field associated with the accretion disk. The degree of polarization of gamma-ray emission for this particular geometry was estimated together with the angle of the polarization vector. Results. We obtain that the configuration of corona plus disk can account for the high degree of polarization of gamma-rays that are detected in galactic black holes and does not need to invoke a relativistic jet. We make specific predictions for sources in a low-hard state. In particular, the model is applied to the transient source XTE J1118+480. We show that if a new outburst of XTE J1118+480 is observed, then its gamma-ray polarization should be measurable by future instruments, such as ASTRO-H or the proposed ASTROGAM.
publishDate 2016
dc.date.none.fl_str_mv 2016-03
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/11336/17475
Vieyro, Florencia Laura; Romero, Gustavo Esteban; Chaty, S.; Modeling the polarization of high-energy radiation from accreting black holes: A case study of XTE J1118+480; Edp Sciences; Astronomy And Astrophysics; 587; 3-2016; 1-7;63
0004-6361
url http://hdl.handle.net/11336/17475
identifier_str_mv Vieyro, Florencia Laura; Romero, Gustavo Esteban; Chaty, S.; Modeling the polarization of high-energy radiation from accreting black holes: A case study of XTE J1118+480; Edp Sciences; Astronomy And Astrophysics; 587; 3-2016; 1-7;63
0004-6361
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://dx.doi.org/10.1051/0004-6361/201526587
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2016/03/aa26587-15/aa26587-15.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 13.22299

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