Using gamma-rays to probe the clumped structure of stellar winds

Autores
Romero, Gustavo Esteban; Owocki, S. P.; Araudo, Anabella Teresa; Townsend, R. H. D.; Benaglia, Paula
Año de publicación
2009
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Gamma-rays can be produced by the interaction of a relativistic jet and the matter of the stellar wind in the subclass of massive X-ray binaries known as “microquasars”. The relativistic jet is ejected from the surroundings of the compact object and interacts with cold protons from the stellar wind, producing pions that then quickly decay into gamma-rays. Since the resulting gamma-ray emissivity depends on the target density, the detection of rapid variability in microquasars with GLAST and the new generation of Cherenkov imaging arrays could be used to probe the clumped structure of the stellar wind. In particular, we show here that the relative fluctuation in gamma rays may scale with the square root of the ratio of porosity length to binary separation, p h/a, implying for example a ca. 10% variation in gamma ray emission for a quite moderate porosity, h/a ∼ 0.01
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: Owocki, S. P.. University of Delaware; Estados Unidos
Fil: Araudo, Anabella Teresa. 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: Townsend, R. H. D.. University of Delaware; Estados Unidos
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
Clumping in hot-star winds
Postdam
Alemania
Universidad de Postdam
Materia
stellar winds
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:11336/228615

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spelling Using gamma-rays to probe the clumped structure of stellar windsRomero, Gustavo EstebanOwocki, S. P.Araudo, Anabella TeresaTownsend, R. H. D.Benaglia, Paulastellar windshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Gamma-rays can be produced by the interaction of a relativistic jet and the matter of the stellar wind in the subclass of massive X-ray binaries known as “microquasars”. The relativistic jet is ejected from the surroundings of the compact object and interacts with cold protons from the stellar wind, producing pions that then quickly decay into gamma-rays. Since the resulting gamma-ray emissivity depends on the target density, the detection of rapid variability in microquasars with GLAST and the new generation of Cherenkov imaging arrays could be used to probe the clumped structure of the stellar wind. In particular, we show here that the relative fluctuation in gamma rays may scale with the square root of the ratio of porosity length to binary separation, p h/a, implying for example a ca. 10% variation in gamma ray emission for a quite moderate porosity, h/a ∼ 0.01Fil: 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: Owocki, S. P.. University of Delaware; Estados UnidosFil: Araudo, Anabella Teresa. 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: Townsend, R. H. D.. University of Delaware; Estados UnidosFil: 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; ArgentinaClumping in hot-star windsPostdamAlemaniaUniversidad de PostdamPostdam UniversityHamann, W. -R.Feldmeier, A.Oskinova, L.2009info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectWorkshopBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/228615Using gamma-rays to probe the clumped structure of stellar winds; Clumping in hot-star winds; Postdam; Alemania; 2007; 191-194978-3-940793-33-1CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://publishup.uni-potsdam.de/frontdoor/index/index/docId/1574info:eu-repo/semantics/altIdentifier/url/https://ui.adsabs.harvard.edu/abs/2008cihw.conf..191R/abstractInternacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:09:21Zoai:ri.conicet.gov.ar:11336/228615instacron: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 10:09:22.041CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Using gamma-rays to probe the clumped structure of stellar winds
title Using gamma-rays to probe the clumped structure of stellar winds
spellingShingle Using gamma-rays to probe the clumped structure of stellar winds
Romero, Gustavo Esteban
stellar winds
title_short Using gamma-rays to probe the clumped structure of stellar winds
title_full Using gamma-rays to probe the clumped structure of stellar winds
title_fullStr Using gamma-rays to probe the clumped structure of stellar winds
title_full_unstemmed Using gamma-rays to probe the clumped structure of stellar winds
title_sort Using gamma-rays to probe the clumped structure of stellar winds
dc.creator.none.fl_str_mv Romero, Gustavo Esteban
Owocki, S. P.
Araudo, Anabella Teresa
Townsend, R. H. D.
Benaglia, Paula
author Romero, Gustavo Esteban
author_facet Romero, Gustavo Esteban
Owocki, S. P.
Araudo, Anabella Teresa
Townsend, R. H. D.
Benaglia, Paula
author_role author
author2 Owocki, S. P.
Araudo, Anabella Teresa
Townsend, R. H. D.
Benaglia, Paula
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Hamann, W. -R.
Feldmeier, A.
Oskinova, L.
dc.subject.none.fl_str_mv stellar winds
topic stellar winds
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Gamma-rays can be produced by the interaction of a relativistic jet and the matter of the stellar wind in the subclass of massive X-ray binaries known as “microquasars”. The relativistic jet is ejected from the surroundings of the compact object and interacts with cold protons from the stellar wind, producing pions that then quickly decay into gamma-rays. Since the resulting gamma-ray emissivity depends on the target density, the detection of rapid variability in microquasars with GLAST and the new generation of Cherenkov imaging arrays could be used to probe the clumped structure of the stellar wind. In particular, we show here that the relative fluctuation in gamma rays may scale with the square root of the ratio of porosity length to binary separation, p h/a, implying for example a ca. 10% variation in gamma ray emission for a quite moderate porosity, h/a ∼ 0.01
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: Owocki, S. P.. University of Delaware; Estados Unidos
Fil: Araudo, Anabella Teresa. 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: Townsend, R. H. D.. University of Delaware; Estados Unidos
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
Clumping in hot-star winds
Postdam
Alemania
Universidad de Postdam
description Gamma-rays can be produced by the interaction of a relativistic jet and the matter of the stellar wind in the subclass of massive X-ray binaries known as “microquasars”. The relativistic jet is ejected from the surroundings of the compact object and interacts with cold protons from the stellar wind, producing pions that then quickly decay into gamma-rays. Since the resulting gamma-ray emissivity depends on the target density, the detection of rapid variability in microquasars with GLAST and the new generation of Cherenkov imaging arrays could be used to probe the clumped structure of the stellar wind. In particular, we show here that the relative fluctuation in gamma rays may scale with the square root of the ratio of porosity length to binary separation, p h/a, implying for example a ca. 10% variation in gamma ray emission for a quite moderate porosity, h/a ∼ 0.01
publishDate 2009
dc.date.none.fl_str_mv 2009
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Workshop
Book
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/228615
Using gamma-rays to probe the clumped structure of stellar winds; Clumping in hot-star winds; Postdam; Alemania; 2007; 191-194
978-3-940793-33-1
CONICET Digital
CONICET
url http://hdl.handle.net/11336/228615
identifier_str_mv Using gamma-rays to probe the clumped structure of stellar winds; Clumping in hot-star winds; Postdam; Alemania; 2007; 191-194
978-3-940793-33-1
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://publishup.uni-potsdam.de/frontdoor/index/index/docId/1574
info:eu-repo/semantics/altIdentifier/url/https://ui.adsabs.harvard.edu/abs/2008cihw.conf..191R/abstract
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.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv Postdam University
publisher.none.fl_str_mv Postdam University
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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