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Evidencia del transporte global de electrones hacia la magnetosfera interna joviana
K Yoshioka1, G Murakami2, A Yamazaki2
1Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara, Japan. kazuo@stp.isas.jaxa.jp.
Science (New York, N.Y.)
|September 27, 2014
Resumen
Júpiter Júpiter Júpiter es el nombre de Júpiter.
Área de la Ciencia:
- Física del espacio Física del espacio
- Física del plasma es la física del plasma.
- Ciencias planetarias Ciencias planetarias.
Sus antecedentes:
- La magnetosfera de Júpiter acelera las partículas, incluidos los electrones ultrarelativistas.
- Las ondas de modo Whistler, impulsadas por electrones calientes, son la clave para esta aceleración.
- Los mecanismos de transporte de electrones en la magnetosfera interna de Júpiter siguen sin estar claros.
Objetivo del estudio:
- Para investigar el transporte de electrones calientes en la magnetosfera interna de Júpiter.
- Para entender la fuente de los electrones que excitan las ondas de modo silbido.
Principales métodos:
- Análisis de las emisiones de la línea ultravioleta extrema (EUV) de la magnetosfera interna de Júpiter.
- Observaciones de escaneo de alta resolución espectral del torus de plasma de Io.
- Generación de perfiles radiales para la fracción de electrones calientes.
Principales resultados:
- La evidencia encontrada para el transporte global hacia el interior de tubos de flujo que contienen plasma caliente.
- La fracción de electrones calientes disminuye con la disminución de la distancia radial en la magnetosfera interna.
- Los perfiles observados contradicen la rápida termicidad, lo que sugiere un reabastecimiento continuo.
Conclusiones:
- El transporte hacia el interior de los tubos de flujo de plasma caliente es un proceso significativo en la magnetosfera de Júpiter.
- Un suministro continuo de electrones calientes es necesario para mantener su presencia.
- Este reabastecimiento alimenta las ondas de modo silbido responsables de la aceleración de las partículas.
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