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Synthesis and Reaction Chemistry of Nanosize Monosodium Titanate
Published on: February 23, 2016
Las mareas de Titán
Luciano Iess1, Robert A Jacobson, Marco Ducci
1Dipartimento di Ingegneria Meccanica e Aerospaziale, Università La Sapienza, via Eudossiana 18, 00184 Rome, Italy. luciano.iess@uniroma1.it
Science (New York, N.Y.)
|June 30, 2012
Resumen
Los datos de la nave espacial Cassini revelan que Titán experimenta tensiones de marea periódicas de Saturno.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Astrogeología y Astrogeología.
- La Dinámica Orbital es una Dinámica Orbital.
Sus antecedentes:
- Titán orbita Saturno en un período de 16 días con una excentricidad orbital de 0.028.
- Se sabe que las fuerzas de las mareas influyen en los cuerpos planetarios, causando deformaciones y tensiones internas.
Objetivo del estudio:
- Para detectar y cuantificar la firma de las tensiones de marea periódicas dentro de la luna de Saturno Titán.
- Para investigar la estructura y composición interna de Titán basada en su respuesta a las fuerzas de marea.
Principales métodos:
- Análisis de las mediciones precisas de aceleración de la nave espacial Cassini durante seis sobrevuelos cercanos (2006-2011).
- Determinación del grado-2 del número de amor de Titán (k(2) a partir de las variaciones del campo gravitatorio.
Principales resultados:
- Se detectaron cambios periódicos en la gravedad cuadrupolar de Titán, aproximadamente el 4% del valor estático.
- Calculados dos valores independientes para el grado-2 Número de amor: k(2) = 0.589 ± 0.150 y k(2) = 0.637 ± 0.224 (2σ).
Conclusiones:
- El interior de Titán debe ser deformable en escalas de tiempo orbitales para dar cuenta de la respuesta de marea observada.
- Los hallazgos sugieren fuertemente la presencia de un océano subterráneo global dentro de Titán.
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