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Restricciones polarimétricas sobre la emisión de resplandor óptico del GRB 990123123
1Astronomical Observatory, University of Copenhagen, Juliane Maries Vej 30, DK-2100 Copenhagen O, Denmark. Science Institute, University of Iceland, Dunhaga 3, IS-107 Reykjavik, Iceland. Nordic Optical Telescope, Ap. 474 St. Cruz de La Palma, E-387.
Resumen
Las mediciones de la emisión óptica de la explosión de rayos gamma (GRB) 990123 no encontraron polarización lineal significativa. Esto sugiere el GRB.
Área de la Ciencia:
- La astrofísica es la astrofísica.
- Astronomía de alta energía Astronomía de alta energía
Sus antecedentes:
- Las explosiones de rayos gamma (GRB) son intensos destellos de rayos cósmicos.
- La comprensión de los mecanismos de emisión de GRB requiere el estudio de las propiedades de las ondas de choque.
Objetivo del estudio:
- Para investigar la polarización de la emisión de resplandor óptico del GRB 990123.3.
- Para restringir la geometría y la estructura del campo magnético de la salida del GRB.
Principales métodos:
- Observaciones ópticas con el Telescopio Óptico Nórdico.
- Medición de la polarización lineal del GRB 990123 después del resplandor.
Principales resultados:
- Se determinó un límite superior del 2,3% en la polarización lineal para GRB 990123.
- No se detectó polarización significativa en el resplandor óptico.
Conclusiones:
- La falta de polarización sugiere un campo magnético coherente insignificante o un chorro altamente colimado visto desde un ángulo pequeño.
- Estos hallazgos pueden ayudar a explicar la liberación de energía en estallidos cosmológicos luminosos.
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