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Actividades hidrotermales en curso dentro de Encelado

Hsiang-Wen Hsu¹, Frank Postberg², Yasuhito Sekine³

¹Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, Colorado 80303, USA.

|March 13, 2015

Resumen

Análisis del Encélado.

Área de la Ciencia:

Ciencias planetarias Ciencias planetarias.
Astrobiología Astrobiología.
La geoquímica es la geoquímica.

Sus antecedentes:

Encélado, una luna de Saturno, exhibe plumas que contienen granos de hielo.
Se detectó un océano subterráneo, lo que sugiere la posibilidad de actividad hidrotermal.
La detección previa de granos ricos en sal de sodio indica interacciones entre la roca y el agua.

Objetivo del estudio:

Analizar las partículas de nanodust ricas en silicio (partículas de corriente) de las plumas de Encélado.
Investigar el origen y las implicaciones de estas partículas únicas.
Determine las condiciones del océano subterráneo de Encélado.

Principales métodos:

Análisis de partículas de SiO2 (sílice) de tamaño nanométrico.
Interpretación de la composición y distribución del tamaño de las partículas.
Correlación con las mediciones de las naves espaciales de la composición del penacho.

Principales resultados:

Las partículas de la corriente identificadas como sílice de tamaño nanométrico (SiO2).
Determinado rango de tamaño de partícula (2-8 nm de radio).
Se indican reacciones hidrotermales de alta temperatura (>90°C).

Conclusiones:

La actividad hidrotermal está en curso en el fondo del océano de Encélado.
La actividad geotérmica global transporta los productos hidrotermales a las columnas.
Estos hallazgos apoyan la potencial habitabilidad del océano subterráneo de Encélado.

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