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Un óvalo de auroras oscuras en Saturno descubierto en imágenes ultravioletas del telescopio espacial Hubble
Science (New York, N.Y.)
|August 18, 1995
Resumen
Las imágenes ultravioletas del Telescopio Espacial Hubble revelaron un óvalo oscuro cerca del polo magnético norte de Saturno. Esta característica, vinculada a la actividad auroral, sugiere que la formación de aerosoles está relacionada con las auroras planetarias.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Ciencias de la atmósfera Ciencias atmosféricas.
- La astronomía es la astronomía.
Sus antecedentes:
- La composición atmosférica y la dinámica de Saturno son áreas clave de la investigación planetaria.
- La actividad auroral en gigantes gaseosos es un fenómeno significativo que influye en la química atmosférica.
Objetivo del estudio:
- Para investigar la naturaleza y el origen de una característica oscura recientemente observada cerca del polo magnético norte de Saturno.
- Para explorar la relación entre las estructuras atmosféricas y la actividad auroral en Saturno.
Principales métodos:
- Análisis de imágenes ultravioletas de la cámara de objetos débiles del Telescopio Espacial Hubble (HST).
- Observación cerca de una longitud de onda de 220 nanómetros para capturar firmas atmosféricas específicas.
- Correlación de las características observadas con los datos aurorales del espectrómetro ultravioleta Voyager.
Principales resultados:
- Descubrimiento de una característica ovalada oscura distinta que rodea el polo magnético norte de Saturno.
- La estructura oval abarca aproximadamente 11 grados de latitud, centrada alrededor de 79 grados norte.
- Se confirmó la coincidencia espacial del óvalo oscuro con la actividad auroral detectada.
Conclusiones:
- El óvalo oscuro observado es probablemente una capa de aerosol formada debido a la actividad auroral.
- Los procesos aurorales juegan un papel en la formación de aerosoles atmosféricos en Saturno.
- Este hallazgo proporciona información sobre la interacción entre los procesos magnetosféricos y la química atmosférica en los gigantes gaseosos.
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