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Aceleración extrema de partículas en el microquásar Cygnus X-3
M Tavani1, A Bulgarelli, G Piano
1INAF-IASF Roma, Via del Fosso del Cavaliere 100, I-00133 Roma, Italy. pi.agile@iasf-roma.inaf.it
Nature
|November 26, 2009
Resumen
Los astrónomos detectaron llamaradas de rayos gamma de alta energía del microquásar Cygnus X-3, proporcionando evidencia de aceleración de partículas en estos sistemas. Este hallazgo ayuda a explicar el mecanismo detrás de la formación de chorros energéticos en microcuásares.
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 microquásares, sistemas binarios galácticos, producen chorros relativistas y llamaradas de radio.
- La evidencia de la aceleración de partículas gigaelectronvolt en microquásares ha sido escasa, dejando los mecanismos de energización de chorro poco claros.
Objetivo del estudio:
- Para investigar la emisión de rayos gamma del microcuásar Cygnus X-3.
- Para explorar la relación entre las llamaradas de rayos gamma, los estados espectrales y las eyecciones de chorro en microcuásares.
Principales métodos:
- Observación de las llamaradas de rayos gamma por encima de 100 MeV desde Cygnus X-3.
- Análisis de las correlaciones temporales entre las llamaradas de rayos gamma y los estados de emisión de radio / rayos X.
Principales resultados:
- Cuatro llamaradas de rayos gamma fueron detectadas desde Cygnus X-3.
- Se encontraron correlaciones temporales entre las llamaradas de rayos gamma y los estados espectrales de transición.
- La aceleración de partículas precedió a las eyecciones de chorros de radio en dos casos, lo que indica la producción de partículas energéticas durante la formación de chorros.
Conclusiones:
- Los microquásares pueden acelerar partículas a energías muy altas, miles de veces más altas que durante los estados de quiescencia.
- El estudio proporciona evidencia sistemática para la aceleración de partículas gigaelectronvolt en microquásares.
- La formación de chorros en microcuásares está relacionada con la producción de partículas de alta energía.
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