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Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera
Published on: January 30, 2020
La emisión de rayos gamma es concurrente con la nova en el binario simbiótico V407 Cygni
1, A A Abdo, M Ackermann
1Space Science Division, Naval Research Laboratory, Washington, DC 20375, USA.
Science (New York, N.Y.)
|August 14, 2010
Resumen
Los astrónomos detectaron emisiones inesperadas de rayos gamma de una nova, V407 Cygni, desafiando los modelos anteriores. Esta es una nova nova.
Área de la Ciencia:
- La astrofísica es la astrofísica.
- Astrofísica de altas energías de alta energía.
- Evolución estelar de la evolución estelar.
Sus antecedentes:
- Las novas son explosiones estelares resultantes de la acreción de enanas blancas.
- Se espera la emisión de rayos X de las conchas de novas, pero las emisiones de mayor energía no lo son.
- V407 Cygni es un sistema estelar simbiótico con una nueva óptica reciente.
Objetivo del estudio:
- Para informar de la detección de la emisión de rayos gamma de la nova V407 Cygni.
- Para investigar el origen de esta inesperada emisión de alta energía.
Principales métodos:
- Observaciones del Telescopio de Gran Área Fermi.
- Análisis de la emisión variable de rayos gamma (0,1 a 10 GeV).
Principales resultados:
- Detección de la emisión variable de rayos gamma de V407 Cygni.
- Las emisiones abarcan energías de 0,1 a 10 GeV.
Conclusiones:
- Mecanismo propuesto: la interacción de la capa de la nova con el medio denso de la gigante roja acelera las partículas.
- Las interacciones protón-protón pueden producir pi(0) rayos gamma de desintegración.
- La dispersión inversa de Compton de la radiación gigante roja es una posible, aunque no confirmada, fuente de emisión.
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