Gamma-Ray Emission From Be/X-Ray Binaries
- Autores
- Orellana, Mariana Dominga; Romero, Gustavo Esteban
- Año de publicación
- 2005
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Be/X-ray binaries are systems formed by a massive Be star and a magnetized neutron star, usually in an eccentric orbit. The Be star has strong equatorial winds occasionally forming a circumstellar disk. When the neutron star intersects the disk the accretion rate dramatically increases and a transient accretion disk can be formed around the compact object. This disk can last longer than a single orbit in the case of major outbursts. If the disk rotates faster than the neutron star, the Cheng-Ruderman mechanism can produce a current of relativistic protons that would impact onto the disk surface, producing gamma-rays from neutral pion decays and initiating electromagnetic cascades inside the disk. In this paper we present calculations of the evolution of the disk parameters during both major and minor X-ray events, and we discuss the generation of gamma-ray emission at different energies within a variety of models that include both screened and unscreened disks.
Facultad de Ciencias Astronómicas y Geofísicas - Materia
-
Ciencias Astronómicas
X-ray binaries
Neutron stars
Gamma-rays - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/124033
Ver los metadatos del registro completo
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Gamma-Ray Emission From Be/X-Ray BinariesOrellana, Mariana DomingaRomero, Gustavo EstebanCiencias AstronómicasX-ray binariesNeutron starsGamma-raysBe/X-ray binaries are systems formed by a massive Be star and a magnetized neutron star, usually in an eccentric orbit. The Be star has strong equatorial winds occasionally forming a circumstellar disk. When the neutron star intersects the disk the accretion rate dramatically increases and a transient accretion disk can be formed around the compact object. This disk can last longer than a single orbit in the case of major outbursts. If the disk rotates faster than the neutron star, the Cheng-Ruderman mechanism can produce a current of relativistic protons that would impact onto the disk surface, producing gamma-rays from neutral pion decays and initiating electromagnetic cascades inside the disk. In this paper we present calculations of the evolution of the disk parameters during both major and minor X-ray events, and we discuss the generation of gamma-ray emission at different energies within a variety of models that include both screened and unscreened disks.Facultad de Ciencias Astronómicas y Geofísicas2005info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf167-178http://sedici.unlp.edu.ar/handle/10915/124033enginfo:eu-repo/semantics/altIdentifier/issn/0004-640Xinfo:eu-repo/semantics/altIdentifier/issn/1572-946Xinfo:eu-repo/semantics/altIdentifier/arxiv/astro-ph/0407450info:eu-repo/semantics/altIdentifier/doi/10.1007/s10509-005-7618-6info:eu-repo/semantics/reference/hdl/10915/123502info: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:UNLP2025-09-03T11:01:38Zoai:sedici.unlp.edu.ar:10915/124033Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-03 11:01:39.092SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
Gamma-Ray Emission From Be/X-Ray Binaries |
| title |
Gamma-Ray Emission From Be/X-Ray Binaries |
| spellingShingle |
Gamma-Ray Emission From Be/X-Ray Binaries Orellana, Mariana Dominga Ciencias Astronómicas X-ray binaries Neutron stars Gamma-rays |
| title_short |
Gamma-Ray Emission From Be/X-Ray Binaries |
| title_full |
Gamma-Ray Emission From Be/X-Ray Binaries |
| title_fullStr |
Gamma-Ray Emission From Be/X-Ray Binaries |
| title_full_unstemmed |
Gamma-Ray Emission From Be/X-Ray Binaries |
| title_sort |
Gamma-Ray Emission From Be/X-Ray Binaries |
| dc.creator.none.fl_str_mv |
Orellana, Mariana Dominga Romero, Gustavo Esteban |
| author |
Orellana, Mariana Dominga |
| author_facet |
Orellana, Mariana Dominga Romero, Gustavo Esteban |
| author_role |
author |
| author2 |
Romero, Gustavo Esteban |
| author2_role |
author |
| dc.subject.none.fl_str_mv |
Ciencias Astronómicas X-ray binaries Neutron stars Gamma-rays |
| topic |
Ciencias Astronómicas X-ray binaries Neutron stars Gamma-rays |
| dc.description.none.fl_txt_mv |
Be/X-ray binaries are systems formed by a massive Be star and a magnetized neutron star, usually in an eccentric orbit. The Be star has strong equatorial winds occasionally forming a circumstellar disk. When the neutron star intersects the disk the accretion rate dramatically increases and a transient accretion disk can be formed around the compact object. This disk can last longer than a single orbit in the case of major outbursts. If the disk rotates faster than the neutron star, the Cheng-Ruderman mechanism can produce a current of relativistic protons that would impact onto the disk surface, producing gamma-rays from neutral pion decays and initiating electromagnetic cascades inside the disk. In this paper we present calculations of the evolution of the disk parameters during both major and minor X-ray events, and we discuss the generation of gamma-ray emission at different energies within a variety of models that include both screened and unscreened disks. Facultad de Ciencias Astronómicas y Geofísicas |
| description |
Be/X-ray binaries are systems formed by a massive Be star and a magnetized neutron star, usually in an eccentric orbit. The Be star has strong equatorial winds occasionally forming a circumstellar disk. When the neutron star intersects the disk the accretion rate dramatically increases and a transient accretion disk can be formed around the compact object. This disk can last longer than a single orbit in the case of major outbursts. If the disk rotates faster than the neutron star, the Cheng-Ruderman mechanism can produce a current of relativistic protons that would impact onto the disk surface, producing gamma-rays from neutral pion decays and initiating electromagnetic cascades inside the disk. In this paper we present calculations of the evolution of the disk parameters during both major and minor X-ray events, and we discuss the generation of gamma-ray emission at different energies within a variety of models that include both screened and unscreened disks. |
| publishDate |
2005 |
| dc.date.none.fl_str_mv |
2005 |
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http://sedici.unlp.edu.ar/handle/10915/124033 |
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eng |
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eng |
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