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Recuperación volcánica en varias fases en Loki Patera en Io
K de Kleer1, M Skrutskie2, J Leisenring3
1Department of Astronomy, University of California at Berkeley, Berkeley, California, USA.
Nature
|May 12, 2017
Resumen
El Loki Patera en la luna de Júpiter Io resurge por un proceso de varias fases que involucra dos ondas. Esta actividad volcánica revela un contenido de gas de lava no uniforme y la densidad de la corteza a través de la patera.
Área de la Ciencia:
- Ciencias planetarias
- Volcanología
- La geofísica
Sus antecedentes:
- Loki Patera en la luna de Júpiter Io es el volcán activo persistente más poderoso en el Sistema Solar.
- Las observaciones anteriores sugirieron reaparición cada 1-3 años, progresando en sentido contrario a las agujas del reloj, pero carecían de suficiente resolución para determinar el proceso exacto.
Objetivo del estudio:
- Para mapear la emisión térmica y la edad de enfriamiento de la lava de todo el piso de Loki Patera.
- Para establecer los procesos físicos responsables del resurgimiento de Loki Patera.
Principales métodos:
- Utilizó imágenes interferométricas terrestres de la emisión térmica de Loki Patera.
- Datos obtenidos el 8 de marzo de 2015, durante una ocultación de Europa de Io.
- Logrado un muestreo espacial de aproximadamente dos kilómetros a través del suelo de la patera.
Principales resultados:
- Se generaron mapas de temperatura y edad de enfriamiento de la lava para todo el suelo de la patera.
- Identificó un proceso de reaparición en varias fases que involucra dos ondas distintas que se propagan y convergen alrededor de la isla central.
- Variaciones observadas en las velocidades de las ondas y los tiempos de inicio, indicando no uniformidad en el contenido de gas de lava y/o en la densidad de la corteza.
Conclusiones:
- El rejuvenecimiento de Loki Patera es un proceso complejo en varias fases, no un simple flujo unidireccional.
- Heterogeneidad inferida en las propiedades del subsuelo de Loki Patera basada en la dinámica de ondas observada.
- Este estudio proporciona detalles sin precedentes sobre los procesos volcánicos que dan forma a este ambiente extremo de Júpiter.
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