Gamma-Ray Emission From Be/X-Ray Binaries

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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 transie...

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Autores principales: Orellana, Mariana Dominga, Romero, Gustavo Esteban
Formato: Articulo
Lenguaje:Inglés
Publicado: 2005
Materias:
Ciencias Astronómicas
X-ray binaries
Neutron stars
Gamma-rays
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/124033
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-124033
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
X-ray binaries
Neutron stars
Gamma-rays
spellingShingle Ciencias Astronómicas
X-ray binaries
Neutron stars
Gamma-rays
Orellana, Mariana Dominga
Romero, Gustavo Esteban
Gamma-Ray Emission From Be/X-Ray Binaries
topic_facet Ciencias Astronómicas
X-ray binaries
Neutron stars
Gamma-rays
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.
format Articulo
Articulo
author Orellana, Mariana Dominga
Romero, Gustavo Esteban
author_facet Orellana, Mariana Dominga
Romero, Gustavo Esteban
author_sort Orellana, Mariana Dominga
title Gamma-Ray Emission From Be/X-Ray Binaries
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
publishDate 2005
url http://sedici.unlp.edu.ar/handle/10915/124033
work_keys_str_mv AT orellanamarianadominga gammarayemissionfrombexraybinaries
AT romerogustavoesteban gammarayemissionfrombexraybinaries
bdutipo_str Repositorios
_version_ 1764820450702000128

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