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Partículas cargadas de alta energía en la magnetosfera joviana más interna
1H. M. Fischer, E. Pehlke, G. Wibberenz, Institut fur Kernphysik, Universitat Kiel, D-24118 Kiel, Germany. L. J. Lanzerotti, Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974, USA. J. D. Mihalov, NASA Ames Research Center, Moffett Field, CA 94035, USA.
Science (New York, N.Y.)
|May 10, 1996
Resumen
Galileo Galileo es el nombre de Galileo.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Física del plasma es la física del plasma.
- Física del espacio Física del espacio
Sus antecedentes:
- La magnetosfera de Júpiter se caracteriza por cinturones de radiación intensa.
- Las partículas energéticas juegan un papel crucial en la dinámica de las magnetosferas planetarias.
Objetivo del estudio:
- Para investigar la energía y las distribuciones angulares de las partículas de alta energía en la región de radiación interna de Júpiter.
- Para determinar la extensión radial y los límites de los cinturones de radiación ecuatorial de Júpiter.
Principales métodos:
- Utilizó el instrumento de investigación de partículas energéticas de la sonda Galileo.
- Energía de partículas medida y distribuciones angulares desde cerca de Io hasta la entrada en la atmósfera de Júpiter.
Principales resultados:
- Se observaron flujos extremadamente grandes de electrones y protones energéticos, con un pico de alrededor de 2,2 radios de Júpiter (RJ).
- Se detectó una absorción significativa de partículas cerca del borde exterior del brillante anillo de polvo de Júpiter.
- Se midieron flujos intensos de iones de helio de alta energía (62 MeV/nucleón) con un pico de 1,5 RJ.
- Identificó una fuerte disminución en la abundancia de partículas a 1,35 RJ, definiendo el borde de radiación más interno.
Conclusiones:
- La región de radiación interna de Júpiter exhibe intensas poblaciones de partículas energéticas.
- El anillo de polvo brillante y un límite de 1,35 RJ influyen significativamente en la distribución de partículas y definen el borde interior del cinturón de radiación.
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