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Los orígenes del plasma caliente en la corona solar
B De Pontieu1, S W McIntosh, M Carlsson
1Lockheed Martin Solar and Astrophysics Laboratory, 3251 Hanover Street, Organization ADBS, Building 252, Palo Alto, CA 94304, USA. bdp@lmsal.com
Science (New York, N.Y.)
|January 8, 2011
Resumen
Los científicos observaron que los chorros de plasma, llamados espículas, suministran a la corona solar material caliente. Este descubrimiento ofrece nuevos conocimientos sobre el misterio del calentamiento de la corona solar.
Área de la Ciencia:
- Física solar Física solar es la física de la energía solar.
- Física del plasma es la física del plasma.
- La astrofísica es la astrofísica.
Sus antecedentes:
- La corona del Sol es millones de grados más caliente que su superficie, un fenómeno conocido como el problema de calentamiento coronal.
- Las teorías actuales sugieren que la energía no térmica de la magnetoconvección calienta la corona, pero el mecanismo exacto sigue siendo elusivo.
Objetivo del estudio:
- Para investigar la fuente del plasma y el suministro de energía a la corona solar.
- Para identificar el mecanismo de calentamiento coronal mediante el análisis de chorros de plasma cromosférico.
Principales métodos:
- Se utilizaron datos de observación del Observatorio de Dinámica Solar (SDO) y de la misión de física solar Hinode.
- Analizó chorros como fuentes, conocidos como espículas, que se originan en la cromosfera.
Principales resultados:
- Se confirmó un suministro generalizado de plasma cromosférico acelerado en la corona a través de espículas.
- Se observó una porción significativa de este plasma calentado a aproximadamente 0.020.1 millones de Kelvin (MK).
- Se detectó una fracción más pequeña pero sustancial de plasma espicular calentado a más de 1 MK.
Conclusiones:
- Las espículas juegan un papel crucial en el suministro y calentamiento del plasma en la corona solar.
- Estos hallazgos proporcionan restricciones críticas para la comprensión del mecanismo de calentamiento coronal.
- La región de interfaz entre la fotosfera y la corona es vital para el calentamiento coronal.
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