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Emisión modulada de rayos gamma de alta energía del microcuásar Cygnus X-3
Science (New York, N.Y.)
|December 8, 2009
Resumen
Los rayos gamma de alta energía han sido detectados desde el microquásar Cygnus X-3 por el Fermi Large Area Telescope (LAT). Este descubrimiento proporciona nuevos conocimientos sobre la formación de chorros relativistas de sistemas binarios.
Área de la Ciencia:
- La astrofísica es la astrofísica.
- Astrofísica de altas energías de alta energía.
- La astronomía de rayos X es una astronomía de rayos X.
Sus antecedentes:
- Los microcuásares son sistemas binarios con agujeros negros en acreción o estrellas de neutrones que emiten chorros relativistas.
- Las búsquedas anteriores de emisiones de rayos gamma de alta energía de microcuásares no han tenido éxito.
- Cygnus X-3 es un conocido sistema binario de rayos X y microquasar.
Objetivo del estudio:
- Para investigar la emisión de rayos gamma de alta energía del microcuásar Cygnus X-3.
- Para confirmar la asociación de la fuente Fermi-LAT con Cygnus X-3.
- Para explorar el origen de la emisión de rayos gamma en microcuásares.
Principales métodos:
- Se utilizaron datos del Telescopio de Gran Área Fermi (LAT).
- Analizó la variabilidad de la fuente de alta energía.
- Flujo de rayos gamma correlacionado con la emisión de radio de los chorros de Cygnus X-3.
- Detectado el período orbital de Cygnus X-3 en los datos de rayos gamma.
Principales resultados:
- Se ha detectado una fuente variable de rayos gamma de alta energía coincidente con Cygnus X-3.
- Confirmó la identificación de la fuente con Cygnus X-3 a través de su período orbital.
- Se observó una correlación entre el flujo de rayos gamma LAT y la emisión de radio de los chorros.
- La emisión de rayos gamma probablemente se origina dentro del sistema binario.
Conclusiones:
- Esta es la primera detección inequívoca de emisión de rayos gamma de alta energía de un microcuásar.
- Los hallazgos abren nuevas vías para estudiar la formación de chorros relativistas dentro de sistemas binarios.
- Cygnus X-3 sirve como un nuevo laboratorio para la investigación de astrofísica de alta energía.
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