Can the gamma-ray source 3EG J2033+4118 be produced by the stellar system Cygnus OB2 No. 5?
- Autores
- Benaglia, Paula; Romero, Gustavo Esteban; Stevens, I. R.; Torres, Diego F.
- Año de publicación
- 2001
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We discuss the possibility that the stellar system Cyg OB2 No. 5 can be a gamma-ray source in the light of recent EGRET and radio data. This system is formed by an O7 Ia + Ofpe/WN9 contact binary. A third star, probably a B0 V star also associated with the system, is located at ∼1700 AU from the primary. We estimate the expected gamma-ray luminosity from the colliding winds region, the terminal shock of the wind, and the unstable zone at the base of the wind, and conclude that, under very reasonable assumptions, Cyg OB2 No. 5 can generate about a half of the gamma-ray flux detected from the positionally coincident source 3EG J2033+4118. We suggest, then, that other O stars belonging to the association, also placed within the 95% probability EGRET location contour, could contribute to the observed gamma-ray flux.
Fil: Benaglia, Paula. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
Fil: Romero, Gustavo Esteban. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
Fil: Stevens, I. R.. University of Birmingham; Reino Unido
Fil: Torres, Diego F.. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina - Materia
-
Gamma ray sources
Cygnus OB2 (estrella)
Gamma rays - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/32264
Ver los metadatos del registro completo
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oai:ri.conicet.gov.ar:11336/32264 |
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Can the gamma-ray source 3EG J2033+4118 be produced by the stellar system Cygnus OB2 No. 5?Benaglia, PaulaRomero, Gustavo EstebanStevens, I. R.Torres, Diego F.Gamma ray sourcesCygnus OB2 (estrella)Gamma rayshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We discuss the possibility that the stellar system Cyg OB2 No. 5 can be a gamma-ray source in the light of recent EGRET and radio data. This system is formed by an O7 Ia + Ofpe/WN9 contact binary. A third star, probably a B0 V star also associated with the system, is located at ∼1700 AU from the primary. We estimate the expected gamma-ray luminosity from the colliding winds region, the terminal shock of the wind, and the unstable zone at the base of the wind, and conclude that, under very reasonable assumptions, Cyg OB2 No. 5 can generate about a half of the gamma-ray flux detected from the positionally coincident source 3EG J2033+4118. We suggest, then, that other O stars belonging to the association, also placed within the 95% probability EGRET location contour, could contribute to the observed gamma-ray flux.Fil: Benaglia, Paula. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; ArgentinaFil: Romero, Gustavo Esteban. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; ArgentinaFil: Stevens, I. R.. University of Birmingham; Reino UnidoFil: Torres, Diego F.. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; ArgentinaEDP Sciences2001-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/32264Torres, Diego F.; Stevens, I. R.; Romero, Gustavo Esteban; Benaglia, Paula; Can the gamma-ray source 3EG J2033+4118 be produced by the stellar system Cygnus OB2 No. 5?; EDP Sciences; Astronomy and Astrophysics; 366; 12-2001; 605-6110004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20000261info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2001/05/aa10320/aa10320.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 Técnicas2025-09-29T09:55:29Zoai:ri.conicet.gov.ar:11336/32264instacron: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:34982025-09-29 09:55:30.279CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Can the gamma-ray source 3EG J2033+4118 be produced by the stellar system Cygnus OB2 No. 5? |
title |
Can the gamma-ray source 3EG J2033+4118 be produced by the stellar system Cygnus OB2 No. 5? |
spellingShingle |
Can the gamma-ray source 3EG J2033+4118 be produced by the stellar system Cygnus OB2 No. 5? Benaglia, Paula Gamma ray sources Cygnus OB2 (estrella) Gamma rays |
title_short |
Can the gamma-ray source 3EG J2033+4118 be produced by the stellar system Cygnus OB2 No. 5? |
title_full |
Can the gamma-ray source 3EG J2033+4118 be produced by the stellar system Cygnus OB2 No. 5? |
title_fullStr |
Can the gamma-ray source 3EG J2033+4118 be produced by the stellar system Cygnus OB2 No. 5? |
title_full_unstemmed |
Can the gamma-ray source 3EG J2033+4118 be produced by the stellar system Cygnus OB2 No. 5? |
title_sort |
Can the gamma-ray source 3EG J2033+4118 be produced by the stellar system Cygnus OB2 No. 5? |
dc.creator.none.fl_str_mv |
Benaglia, Paula Romero, Gustavo Esteban Stevens, I. R. Torres, Diego F. |
author |
Benaglia, Paula |
author_facet |
Benaglia, Paula Romero, Gustavo Esteban Stevens, I. R. Torres, Diego F. |
author_role |
author |
author2 |
Romero, Gustavo Esteban Stevens, I. R. Torres, Diego F. |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
Gamma ray sources Cygnus OB2 (estrella) Gamma rays |
topic |
Gamma ray sources Cygnus OB2 (estrella) Gamma rays |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
We discuss the possibility that the stellar system Cyg OB2 No. 5 can be a gamma-ray source in the light of recent EGRET and radio data. This system is formed by an O7 Ia + Ofpe/WN9 contact binary. A third star, probably a B0 V star also associated with the system, is located at ∼1700 AU from the primary. We estimate the expected gamma-ray luminosity from the colliding winds region, the terminal shock of the wind, and the unstable zone at the base of the wind, and conclude that, under very reasonable assumptions, Cyg OB2 No. 5 can generate about a half of the gamma-ray flux detected from the positionally coincident source 3EG J2033+4118. We suggest, then, that other O stars belonging to the association, also placed within the 95% probability EGRET location contour, could contribute to the observed gamma-ray flux. Fil: Benaglia, Paula. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina Fil: Romero, Gustavo Esteban. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina Fil: Stevens, I. R.. University of Birmingham; Reino Unido Fil: Torres, Diego F.. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina |
description |
We discuss the possibility that the stellar system Cyg OB2 No. 5 can be a gamma-ray source in the light of recent EGRET and radio data. This system is formed by an O7 Ia + Ofpe/WN9 contact binary. A third star, probably a B0 V star also associated with the system, is located at ∼1700 AU from the primary. We estimate the expected gamma-ray luminosity from the colliding winds region, the terminal shock of the wind, and the unstable zone at the base of the wind, and conclude that, under very reasonable assumptions, Cyg OB2 No. 5 can generate about a half of the gamma-ray flux detected from the positionally coincident source 3EG J2033+4118. We suggest, then, that other O stars belonging to the association, also placed within the 95% probability EGRET location contour, could contribute to the observed gamma-ray flux. |
publishDate |
2001 |
dc.date.none.fl_str_mv |
2001-12 |
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/11336/32264 Torres, Diego F.; Stevens, I. R.; Romero, Gustavo Esteban; Benaglia, Paula; Can the gamma-ray source 3EG J2033+4118 be produced by the stellar system Cygnus OB2 No. 5?; EDP Sciences; Astronomy and Astrophysics; 366; 12-2001; 605-611 0004-6361 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/32264 |
identifier_str_mv |
Torres, Diego F.; Stevens, I. R.; Romero, Gustavo Esteban; Benaglia, Paula; Can the gamma-ray source 3EG J2033+4118 be produced by the stellar system Cygnus OB2 No. 5?; EDP Sciences; Astronomy and Astrophysics; 366; 12-2001; 605-611 0004-6361 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20000261 info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2001/05/aa10320/aa10320.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 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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1844613673188851712 |
score |
13.070432 |