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Ciencia del cometa. La estructura del regolito en 67P/Churyumov-Gerasimenko de las imágenes de descenso de ROLIS

S Mottola¹, G Arnold², H-G Grothues³

¹German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany. stefano.mottola@dlr.de.

Science (New York, N.Y.)

|August 1, 2015

Resumen

El cometa 67P

Área de la Ciencia:

Ciencia de los cometas
Geología planetaria

Sus antecedentes:

La superficie de los cometas está formada por su actividad.
La comprensión de las estructuras superficiales de los cometas proporciona información sobre su evolución.

Objetivo del estudio:

Para analizar la estructura de la superficie del cometa 67P/Churyumov-Gerasimenko utilizando imágenes de alta resolución.
Para investigar los procesos responsables de la formación de la capa superior del cometa.

Principales métodos:

Adquisición de imágenes de corta distancia utilizando el sistema de imágenes de aterrizaje Rosetta (ROLIS) durante el descenso de Philae.
Análisis de la morfología de la superficie, distribución del tamaño de las partículas y espesor del regolito.
Modelado de los procesos de erosión y movilización.

Principales resultados:

El sitio de Agilkia en el cometa 67P exhibe una superficie fotométricamente uniforme cubierta por regolito (detritos de tamaño de centímetros a metros).
Las imágenes de alta resolución revelan una superficie granular sin partículas sin resolver del tamaño de la arena.
El grosor del regolito varía de 0 a 2 metros; las características parecidas a las eólicas sugieren movilización y erosión.

Conclusiones:

La actividad superficial del cometa influye significativamente en la estructura de la capa superior.
La abrasión por salpicaduras de partículas inducidas por caídas de aire es un mecanismo probable para las formaciones observadas.
Los hallazgos contribuyen a la comprensión de los procesos y la evolución de la superficie cometaria.

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