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Una fuerza de tensión magnética dinámica como la causa de las erupciones solares fallidas
Clayton E Myers1,2, Masaaki Yamada2, Hantao Ji1,2,3
1Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey 08544, USA.
Nature
|December 25, 2015
Resumen
Las cuerdas de flujo solar pueden no estallar debido a un fuerte campo magnético de guía, que crea una fuerza de tensión que falta en los modelos actuales. Este hallazgo explica previamente inexplicable
Área de la Ciencia:
- Física solar
- Física del plasma
- La astrofísica
Sus antecedentes:
- Las eyecciones de masa coronal (ECM) se originan en la corona del Sol.
- Las cuerdas de flujo magnético almacenan energía para las CME.
- La inestabilidad del toro es el presunto impulsor de las erupciones de cuerda de flujo.
Objetivo del estudio:
- Investigue por qué las cuerdas de flujo inestables a veces no pueden estallar.
- Identificar el mecanismo físico detrás de las erupciones fallidas.
- Resolver las contradicciones entre la teoría y la observación.
Principales métodos:
- Experimento de laboratorio que simula el fenómeno magnético solar.
- Análisis de la dinámica de las cuerdas de flujo en condiciones variables de campo magnético.
- Comparación de resultados experimentales con modelos teóricos existentes.
Principales resultados:
- Se identificó un criterio de erupción previamente desconocido.
- Los fuertes campos magnéticos de guía evitan que las cuerdas de flujo se doblen, deteniendo las erupciones.
- Se observó una fuerza de tensión de campo toroidal dinámica, deteniendo las erupciones.
- Esta fuerza está ausente en los modelos actuales de erupción.
Conclusiones:
- El papel del campo magnético guía en la prevención de torceduras es crucial para erupciones fallidas.
- Los modelos existentes no tienen en cuenta la fuerza de tensión toroidal, lo que limita el poder predictivo.
- Se necesitan nuevos modelos para incorporar esta fuerza para una predicción precisa de CME.
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