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Un anti-fallo en el funcionamiento de un magnetar
R F Archibald1, V M Kaspi, C-Y Ng
1Department of Physics, McGill University, Montreal, Quebec H3A 2T8, Canada.
Nature
|May 31, 2013
Resumen
Los magnetares, estrellas de neutrones altamente magnetizadas, generalmente giran durante las fallas. Los investigadores observaron un raro giro hacia abajo del magnetar "anti-glitch", desafiando las teorías actuales del comportamiento de las estrellas de neutrones.
Área de la Ciencia:
- La astronomía es la astronomía.
- La astrofísica es la astrofísica.
- Física estelar Física estelar es la física estelar.
Sus antecedentes:
- Los magnetares son estrellas de neutrones con poderosos campos magnéticos, que exhiben explosiones de rayos X y rayos gamma.
- Las estrellas de neutrones, incluidos los magnetares y los pulsares de radio, experimentan "glitches" eventos repentinos de espín-up atribuidos a la transferencia de momento angular entre la corteza y el interior superfluido.
Objetivo del estudio:
- Para investigar el fenómeno de los fallos de magnetar, centrándose específicamente en un inusual evento de giro hacia abajo.
- Para analizar las variaciones de rayos X que acompañan y los cambios en la velocidad de giro hacia abajo asociados con el anti-glitch observado.
Principales métodos:
- Se realizaron observaciones de tiempo de rayos X del magnetar 1E 2259+586.6.
- Analizó los datos de tiempo para detectar y caracterizar los eventos de spin-down y los cambios radiativos asociados.
Principales resultados:
- Se observó un evento distinto de "anti-fallas" en el magnetar 1E 2259+586, caracterizado por un repentino giro hacia abajo.
- El evento anti-fallas fue acompañado por múltiples cambios radiativos de rayos X y una alteración significativa en la velocidad de giro hacia abajo del magnetar.
Conclusiones:
- El comportamiento de giro hacia abajo observado desafía los modelos existentes de giro hacia abajo de las estrellas de neutrones.
- Este evento sugiere una rotación diferencial dentro del magnetar, lo que requiere una reevaluación de la teoría de fallas para todas las estrellas de neutrones.
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