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Explosiones calientes en la fría atmósfera del Sol

H Peter¹, H Tian², W Curdt³

¹Max Planck Institute for Solar System Research, 37077 Göttingen, Germany. peter@mps.mpg.de.

Science (New York, N.Y.)

|October 18, 2014

Resumen

Observaciones solares recientes revelan que la fotosfera es más compleja de lo que se pensaba, con bolsas de plasma temporalmente calentadas. Esta complejidad ofrece nuevos conocimientos sobre la conversión de energía durante las erupciones solares y la reconexión magnética.

Área de la Ciencia:

Física solar Física solar es la física de la energía solar.
La astrofísica del plasma es la astrofísica del plasma.
La magnetohidrodinámica es una dinámica magnética.

Sus antecedentes:

La atmósfera solar, particularmente la fotosfera, fue modelada tradicionalmente como unidimensional.
Las últimas décadas han cambiado este punto de vista, considerando la cromosfera y la corona como envolturas dinámicas y estructuradas.
El espectrógrafo de imágenes de la región de interfaz (IRIS) proporciona observaciones de alta resolución de los fenómenos atmosféricos solares.

Objetivo del estudio:

Para investigar la compleja estructura térmica de la fotosfera solar.
Comprender las fuentes de energía y los mecanismos detrás de los eventos de calentamiento transitorios en la fotosfera.
Para obtener información sobre los procesos de conversión de energía durante las erupciones solares y la reconexión magnética.

Principales métodos:

Análisis de los datos de observación del espectrógrafo de imágenes de la región de interfaz (IRIS).
Caracterización de las propiedades del plasma, incluyendo la temperatura y la dinámica, dentro de la fotosfera.
Correlación de los fenómenos observados con la actividad de las llamaradas solares y los eventos de reconexión magnética.

Principales resultados:

Las observaciones de IRIS revelan bolsas transitorias de plasma calentadas a casi 100.000 grados Kelvin dentro de la fotosfera más fría de 6000 grados Kelvin.
La complejidad de la fotosfera desafía a los modelos unidimensionales tradicionales.
Fracciones significativas de energía de las erupciones solares están implicadas en el calentamiento y aceleración de este plasma.

Conclusiones:

La fotosfera solar es una región más dinámica y compleja de lo que se entendía anteriormente.
Los eventos de calentamiento transitorios están relacionados con la liberación de energía sustancial, posiblemente de la reconexión magnética.
Estos hallazgos proporcionan información crucial sobre los mecanismos de conversión de energía que impulsan la actividad solar.

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