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Method for Recording Broadband High Resolution Emission Spectra of Laboratory Lightning Arcs
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Variabilidad espectral rápida de una llamarada gigante de un magnetar en NGC 253
O J Roberts1, P Veres2, M G Baring3
1Universities Space and Research Association, Huntsville, AL, USA. oroberts@usra.edu.
Nature
|January 14, 2021
Resumen
Los científicos han observado un magnetar
Área de la Ciencia:
- La astrofísica
- Astrofísica de alta energía
- Investigación de estrellas de neutrones
Sus antecedentes:
- Los magnetares son estrellas de neutrones con intensos campos magnéticos.
- Emiten ráfagas de rayos X y raras y poderosas llamaradas gigantes.
- Las anteriores llamaradas gigantes saturaron los detectores, dificultando el estudio detallado.
Objetivo del estudio:
- Para investigar la naturaleza de las llamaradas gigantes extragalácticas.
- Para analizar el estallido de rayos gamma GRB 200415A.
- Para determinar si el GRB 200415A es una llamarada gigante extragaláctica.
Principales métodos:
- Observaciones de rayos X y rayos gamma de GRB 200415A.
- Análisis de las características de las ráfagas: inicio, variabilidad, espectros.
- La asociación de la explosión con la galaxia NGC 253.
Principales resultados:
- GRB 200415A exhibe propiedades consistentes con una llamarada gigante de magnetar.
- El estallido estaba direccionalmente vinculado a la cercana galaxia NGC 253.
- La detección de fotones de alta energía sugiere movimiento de plasma relativista.
Conclusiones:
- GRB 200415A es probablemente el primer magnetar gigante extragaláctico observado.
- La radiación de plasma relativista puede explicar la evolución espectral observada.
- Este hallazgo avanza nuestra comprensión de los eventos astrofísicos extremos.
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