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Diversas poblaciones de plasma y estructuras en la cola magnética de Júpiter
D J McComas1, F Allegrini, F Bagenal
1Southwest Research Institute, 6220 Culebra Road, San Antonio, TX 78238, USA. dmccomas@swri.edu
Science (New York, N.Y.)
|October 13, 2007
Resumen
La misión Nuevos Horizontes exploró Júpiter.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Física del espacio Física del espacio
- Física del plasma es la física del plasma.
Sus antecedentes:
- La cola magnética de Júpiter es la estructura más grande del sistema solar.
- Es una región clave para la pérdida de iones del sistema joviano.
- Comprender su dinámica es crucial para la ciencia planetaria.
Objetivo del estudio:
- Para investigar las poblaciones de plasma y las estructuras dentro de la cola magnética de Júpiter.
- Para analizar la evolución de iones y la variabilidad en la cola magnética.
- Para caracterizar la diversidad de los fenómenos plasmáticos observados por New Horizons.
Principales métodos:
- Mediciones in situ realizadas por la nave espacial New Horizons.
- La travesía de la cola magnética a distancias más allá de 2500 radios de Júpiter (R(J)).
- Análisis del flujo de plasma, energía y variaciones estructurales.
Principales resultados:
- Se observó una amplia gama de poblaciones y estructuras plasmáticas.
- Evolución de iones identificados de un disco de plasma a flujos más lentos hacia la cola.
- Se detectaron cambios de flujo cuasi periódicos y variaciones en la velocidad de flujo, potencialmente vinculados a plasmoides.
Conclusiones:
- La cola magnética de Júpiter exhibe una estructuración plasmática significativa y una evolución dinámica.
- Las poblaciones iónicas se originan tanto en la ionosfera de Io como en la de Júpiter.
- La variabilidad en la cola magnética puede ser impulsada por fenómenos como la dinámica plasmoide.
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