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Bringing the Visible Universe into Focus with Robo-AO
Published on: February 12, 2013
Imágenes del telescopio espacial Hubble de la aurora polar del norte en Júpiter
Resumen
El Telescopio Espacial Hubble capturó las primeras imágenes ultravioletas de la aurora de Júpiter, revelando brillo no uniforme y un tamaño que sugiere que las partículas se originan lejos de Júpiter. Esto proporciona nuevos conocimientos sobre la dinámica de las auroras jovianas.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Física del espacio Física del espacio
- La astronomía es la astronomía.
Sus antecedentes:
- Júpiter posee una magnetosfera dinámica y emisiones aurorales.
- Estudios anteriores se basaron en observaciones indirectas de las auroras jovianas.
Objetivo del estudio:
- Para presentar las primeras imágenes ultravioletas directas de la aurora de Júpiter.
- Para analizar la distribución espacial y las características del óvalo auroral joviano.
Principales métodos:
- Utilizó la cámara de objetos débiles del telescopio espacial Hubble para imágenes ultravioletas.
- Observaciones correlacionadas con el encuentro de la nave espacial Ulises con Júpiter el 8 de febrero de 1992.
Principales resultados:
- El óvalo de las auroras jovianas no es uniformemente luminoso, con un brillo mínimo notable.
- Las regiones de auroras más brillantes se observaron a última hora de la tarde joviana, hora local.
- El tamaño del óvalo observado es consistente con las partículas aurorales que se originan en líneas de campo magnético con L > 8.
Conclusiones:
- La estructura del óvalo auroral se desvía de los modelos basados en configuraciones de campo magnético más simples.
- Los grandes valores de L-shell sugieren una migración significativa de partículas de las lunas de Júpiter, como Io, o su toro.
- Estos hallazgos mejoran nuestra comprensión de los procesos magnetosféricos y los orígenes de las partículas en los gigantes gaseosos.
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