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Se requiere un nuevo proceso explosivo para el estallido de rayos gamma GRB 06061414
A Gal-Yam1, D B Fox, P A Price
1Division of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, California 91125, USA. avishay@astro.caltech.edu
Nature
|December 22, 2006
Resumen
Las observaciones ópticas de las explosiones de rayos gamma (GRB) desafían los modelos existentes. GRB 060614, un evento de larga duración, ocurrió sin una supernova, lo que sugiere que pueden estar involucrados nuevos procesos explosivos o tipos de progenitor.
Área de la Ciencia:
- La astrofísica es la astrofísica.
- Astrofísica de altas energías de alta energía.
Sus antecedentes:
- Las explosiones de rayos gamma (GRB) son poderosas explosiones cósmicas.
- Los GRB de larga duración suelen estar relacionados con la muerte de estrellas masivas (colapso) y las supernovas.
- Se cree que los GRB de corta duración se originan a partir de fusiones de objetos compactos.
Objetivo del estudio:
- Para investigar el origen del GRB 060614, un estallido de rayos gamma de larga duración.
- Para determinar si GRB 060614 estaba asociado con una supernova.
- Explorar nuevos modelos para los progenitores de los GRB.
Principales métodos:
- Observaciones ópticas del GRB 060614.4 han sido realizadas.
- Análisis de las propiedades de la galaxia anfitriona (redshift z = 0.125).
Principales resultados:
- Se confirmó la ausencia de una supernova asociada para GRB 060614.
- Las propiedades de la galaxia anfitriona de GRB 060614 difieren de las de los anfitriones típicos de GRB de larga duración.
- La duración del evento fue de aproximadamente 100 segundos.
Conclusiones:
- Los hallazgos desafían el modelo de colapso estándar para GRB de larga duración.
- Es probable que se requiera un nuevo proceso explosivo o un nuevo progenitor de GRB.
- GRB 060614 puede representar una nueva clase de evento de ráfaga de rayos gamma.
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