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Medición e implicaciones del campo de gravedad y la masa de los anillos de Saturno
L Iess1, B Militzer2,3, Y Kaspi4
1Department of Mechanical and Aerospace Engineering, Sapienza Università di Roma, Rome 00184, Italy. luciano.iess@uniroma1.it.
Resumen
Saturno también.
Área de la Ciencia:
- Ciencias planetarias
- La astronomía
- La astrofísica
Sus antecedentes:
- La estructura interior de Saturno, la profundidad del viento y la masa / edad de los anillos son clave para comprender su formación y evolución.
- La fase final de la misión Cassini brindó oportunidades únicas para estudiar Saturno de cerca.
Objetivo del estudio:
- Para determinar el campo gravitacional de Saturno y la masa de sus anillos.
- Para investigar la profundidad de los vientos atmosféricos de Saturno y la rotación diferencial.
Principales métodos:
- Utilizó el monitoreo de enlaces de radio entre la nave espacial Cassini y la Tierra durante múltiples inmersiones entre Saturno y sus anillos.
- Analizó los datos del campo gravitacional para inferir las propiedades atmosféricas y la masa del anillo.
Principales resultados:
- La gravedad de Saturno se desvía de los modelos teóricos, lo que indica que la rotación diferencial atmosférica se extiende a al menos 9000 km de profundidad.
- La masa total de los anillos de Saturno se estima en (1.54 ± 0.49) × 10 ^ 19 kg, aproximadamente 0,41 veces la de Mimas.
Conclusiones:
- La dinámica atmosférica profunda de Saturno es más compleja de lo que se pensaba.
- La masa estimada de los anillos sugiere una edad potencial de formación de 10^7 a 10^8 años, lo que implica un sistema de anillos relativamente joven.
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