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Ganímedes: características de la superficie del radar
Science (New York, N.Y.)
|January 11, 1980
Resumen
Las observaciones de radar revelan el Ganymede.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- La astronomía es la astronomía.
- Física de la superficie Física de las superficies
Sus antecedentes:
- Ganímedes, la luna más grande de Júpiter, exhibe características de superficie únicas.
- Estudios anteriores han notado anomalías en la reflectividad de Ganímedes.
Objetivo del estudio:
- Para investigar las inusuales propiedades de brillo y polarización de la superficie de Ganímedes.
- Desarrollar un modelo que explique estas características de radar observadas.
Principales métodos:
- Análisis de las observaciones de radar de banda X de Ganímedes.
- Desarrollo de un modelo de dispersión de superficie.
Principales resultados:
- La superficie de Ganímedes muestra un brillo inesperadamente alto.
- Se detectaron firmas de polarización distintivas.
- Un modelo que involucra numerosas facetas aleatorias de hielo (interfaces vacío-hielo) replica con éxito las observaciones.
Conclusiones:
- La superficie de Ganímedes se caracteriza por una alta densidad de facetas de hielo orientadas al azar.
- Esta estructura superficial a microescala explica las propiedades anómalas observadas en los radares.
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