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Imágenes de las observaciones de la Magneto-Nebulosa de Sodio de Júpiter durante el encuentro con Ulises
Science (New York, N.Y.)
|September 11, 1992
Resumen
La nave espacial Ulysses observó la vasta nebulosa de sodio de Júpiter, encontrándola más pequeña de lo esperado. El análisis sugiere que la actividad volcánica más baja en Io y los cambios en el toro plasmático influyeron en su tamaño y brillo.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Física del espacio Física del espacio
- La astronomía es la astronomía.
Sus antecedentes:
- La gran nebulosa de sodio de Júpiter es una gran estructura observada por la nave espacial Ulises.
- Las observaciones anteriores indicaban una nebulosa más grande y brillante.
Objetivo del estudio:
- Para analizar las características de la gran nebulosa de sodio de Júpiter durante el encuentro de la nave espacial Ulises en 1992.
- Investigar los factores que influyen en la escala y el brillo observados de la nebulosa.
Principales métodos:
- Imágenes de tierra tomadas desde el monte Haleakala, Hawai.
- Análisis de los datos de la trayectoria de la nave espacial Ulysses.
- Estudios de modelado de la magnetosfera y el toro de plasma de Júpiter.
Principales resultados:
- La nebulosa se extendía al menos a +/-300 radios jovianos, más pequeña y menos brillante de lo observado anteriormente.
- Se sugirió una actividad volcánica reducida en la luna de Júpiter, Io.
- Se indicaron temperaturas de iones más altas y un menor contenido de plasma en el toroides.
- Se detectaron nubes atómicas neutras rápidas a lo largo de la trayectoria de entrada.
Conclusiones:
- Las características observadas de la nebulosa de sodio están relacionadas con el reducido volcanismo de Io y las condiciones alteradas del toro plasmático.
- Se encontraron menos neutros en la trayectoria posterior al encuentro, lo que sugiere fenómenos localizados.
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