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Resultados del campo magnético de Venus del pionero inicial: observaciones nocturnas
Science (New York, N.Y.)
|July 6, 1979
Resumen
El magnetómetro Pioneer Venus detectó campos nocturnos moderadamente fuertes en Venus. Sin embargo, estos campos horizontales y variables muestran poca evidencia de una dínamo interna, lo que sugiere un momento magnético intrínseco débil.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- La magnetohidrodinámica es una dinámica magnético-hidrodinámica.
- Física del espacio Física del espacio
Sus antecedentes:
- El Pioneer Venus orbiter proporcionó mediciones in situ del entorno magnético de Venus.
- La magnetosfera nocturna de Venus es compleja e influenciada por las interacciones del viento solar.
- Comprender el campo magnético intrínseco de Venus es crucial para la planetología comparativa.
Objetivo del estudio:
- Para investigar el origen de los campos magnéticos observados en el lado nocturno de Venus.
- Para evaluar la probabilidad de que una dínamo interna genere el campo magnético de Venus.
- Para establecer un límite superior para el momento magnético intrínseco de Venus.
Principales métodos:
- Análisis de los datos del magnetómetro del orbitador Pioneer Venus.
- Examen de la intensidad del campo magnético, la orientación y las variaciones temporales.
- Comparación de las características de campo observadas con las predicciones para la generación de dínamo interno.
Principales resultados:
- Detección frecuente de campos magnéticos moderadamente fuertes (20-30 nT) en el lado nocturno de Venus.
- Los campos observados son predominantemente horizontales y exhiben una significativa variabilidad orbital.
- Estas características proporcionan pruebas limitadas de un origen dinámico interno.
Conclusiones:
- Es poco probable que los campos magnéticos nocturnos observados en Venus sean generados por una dínamo interna.
- Se requiere un procesamiento adicional de datos para determinar un límite superior preciso para el momento magnético intrínseco.
- Venus probablemente posee un momento magnético intrínseco muy débil, significativamente menor que 10^22 G cm^3,3.
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