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Simulation of the Planetary Interior Differentiation Processes in the Laboratory
Published on: November 15, 2013
La estructura interna diferenciada de Europa: inferencias de cuatro encuentros con Galileo
J D Anderson1, G Schubert, R A Jacobson
1Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA.
Science (New York, N.Y.)
|September 25, 1998
Resumen
Los datos de la nave espacial Galileo refinan los modelos de Júpiter creados por la nave espacial.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Astrogeología y Astrogeología.
- La geofísica es la geofísica.
Sus antecedentes:
- Europa, una luna de Júpiter, es un objetivo clave en la búsqueda de vida extraterrestre.
- Comprender la estructura interna de Europa es crucial para evaluar su habitabilidad.
- Los modelos anteriores sugirieron un interior diferenciado, pero la evidencia directa fue limitada.
Objetivo del estudio:
- Para refinar los modelos de la estructura interior de Europa utilizando datos de radio Doppler.
- Para limitar la posible composición y extensión del núcleo y el manto de Europa.
- Para determinar el grosor de la capa externa de hielo y agua líquida de Europa.
Principales métodos:
- Análisis de los datos de radio Doppler recogidos durante cuatro encuentros de la nave espacial Galileo con Europa.
- Aplicación del modelado geofísico para interpretar las desviaciones de la trayectoria de la nave espacial.
- Comparación de los datos observados con las predicciones de varios modelos de interiores.
Principales resultados:
- Es probable que Europa se diferencie en un núcleo metálico, un manto de silicatos y una capa externa de hielo líquido.
- No se puede descartar una mezcla uniforme de silicato y metal debajo de la capa de hielo líquido.
- El núcleo metálico de Europa podría ser tan grande como el 50% de su radio.
- El grosor de la capa externa de hielo líquido se estima entre 80 y 170 kilómetros.
Conclusiones:
- La estructura interior de Europa es compleja y no está completamente resuelta por los datos actuales.
- El potencial de un océano subterráneo, indicado por la gruesa capa de hielo líquido, apoya el interés astrobiológico de Europa.
- Se necesitan más observaciones y modelos para caracterizar completamente la composición central y la diferenciación interna de Europa.
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