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Observaciones de EUVE de Júpiter durante el impacto del cometa Shoemaker-Levy 9
Science (New York, N.Y.)
|June 16, 1995
Resumen
Los impactos del cometa Shoemaker-Levy 9 en Júpiter causaron un aumento temporal de diez veces en el brillo de la línea de helio neutro (He I) 58.4 nm. Este brillo se atribuye a la luz solar que se dispersa en los restos de pluma de impacto a gran altitud.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- La astronomía es la astronomía.
- Física del espacio Física del espacio
Sus antecedentes:
- El cometa Shoemaker-Levy 9 se fragmentó e impactó con Júpiter en julio de 1994.
- La respuesta del sistema joviano a tales eventos energéticos es de gran interés científico.
Objetivo del estudio:
- Para analizar los efectos de los impactos del cometa Shoemaker-Levy 9 en la atmósfera de Júpiter.
- Para investigar los cambios en las emisiones jovianas, específicamente la línea de resonancia de helio neutro (He I).
Principales métodos:
- Se utilizaron datos del satélite Extreme Ultraviolet Explorer (EUVE) para el estudio de la luz ultravioleta extrema.
- Observaciones realizadas antes, durante y después de los impactos de fragmentos de cometas.
- Se analizó la intensidad de la línea de resonancia He I de 58,4 nm.
Principales resultados:
- Se observó un aumento temporal de diez veces en el brillo de la línea He I de 58,4 nm aproximadamente 2-4 horas después del impacto para fragmentos más grandes.
- Los brillos transitorios sugieren una perturbación atmosférica significativa.
Conclusiones:
- La explicación principal para el brillo de la línea de helio es la dispersión resonante de la luz solar por los restos de pluma de impacto a gran altitud.
- La excitación por impacto de electrones y la recombinación radiativa de He (((+) se consideran como posibles factores que contribuyen a la señal observada.
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