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Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses
Published on: July 2, 2012
Pulsares de alta velocidad en el halo galáctico
Resumen
Los púlsares de alta velocidad pueden originarse en estrellas primordiales en halos galácticos o en el espacio extragaláctico. Esta población de estrellas de neutrones podría explicar las explosiones de rayos gamma, lo que sugiere que la mayoría ocurren fuera de las galaxias visibles.
Área de la Ciencia:
- La astrofísica es la astrofísica.
- Cosmología Cosmología.
- Física de las estrellas de neutrones Física de las estrellas de neutrones
Sus antecedentes:
- Los púlsares son estrellas de neutrones que giran rápidamente y emiten haces de radiación electromagnética.
- El origen y la distribución de los púlsares de alta velocidad siguen siendo incompletamente entendidos.
- Las explosiones de rayos gamma (GRB) son intensos, breves destellos de rayos gamma, con sus orígenes precisos debatidos.
Objetivo del estudio:
- Proponer un nuevo origen para los púlsares de alta velocidad.
- Para vincular estos púlsares con las estrellas primordiales (población III).
- Ofrecer una explicación para la distribución observada de las ráfagas de rayos gamma.
Principales métodos:
- Modelado teórico de la evolución estelar y la formación de púlsares.
- Análisis de entornos astrofísicos, incluidos los halos galácticos y el espacio extragaláctico.
- Comparación de las predicciones teóricas con los datos de observación de púlsares y explosiones de rayos gamma.
Principales resultados:
- Se propone que los púlsares de alta velocidad se formen a partir de estrellas de población III en halos galácticos extendidos o regiones extragalácticas.
- Este escenario sugiere que una población significativa de estrellas de neutrones existe más allá del disco galáctico visible.
- El modelo proporciona una explicación potencial para las explosiones de rayos gamma, localizando la mayoría de las galaxias visibles externas.
Conclusiones:
- Las estrellas primordiales son una fuente viable para los púlsares de alta velocidad.
- La distribución de estos púlsares apoya su origen en halos galácticos y espacio extragaláctico.
- Este marco ofrece una explicación convincente para los fenómenos de ráfagas de rayos gamma y sus ubicaciones.
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