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Observaciones de plasma cerca de Neptuno: resultados iniciales del Voyager 2
Science (New York, N.Y.)
|December 15, 1989
Resumen
La Voyager 2 es una nave espacial.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Física del plasma es la física del plasma.
- Física de la magnetosfera Física de la magnetosfera Física de la magnetosfera Física de la magnetosfera Física de la magnetosfera Física de la magnetosfera Física de la magnetosfera
Sus antecedentes:
- La Voyager 2 exploró la magnetosfera de Neptuno y el viento solar circundante.
- La magnetosfera de Neptuno presenta una inclinación significativa del dipolo magnético.
- La misión proporcionó las primeras observaciones de la cúspide de un planeta exterior.
Objetivo del estudio:
- Caracterice el entorno de plasma dentro de la magnetosfera de Neptuno.
- Investigar la transición de la capa magnética a la magnetosfera.
- Identificar los componentes plasmáticos y sus fuentes.
Principales métodos:
- Mediciones de plasma in situ realizadas por la nave espacial Voyager 2.
- Análisis de la densidad del plasma, la temperatura y la composición iónica.
- Observación de la estructura y dinámica de la magnetosfera.
Principales resultados:
- Se observó una transición gradual de la capa magnética a la magnetosfera a través de la región de la cúspide.
- Se registró la densidad de plasma más baja (1.4/cm3) en cualquier magnetosfera estudiada por la Voyager.
- Se identificaron dos componentes plasmáticos: iones ligeros (masa 1-5) y iones pesados (masa 10-40).
- Plasma concentrado en una lámina/torus cerca de la aproximación más cercana.
Conclusiones:
- La magnetosfera de Neptuno es dinámica, influenciada por su campo magnético inclinado.
- La atmósfera/ionosfera de Tritón es una fuente probable de iones pesados.
- Los iones de luz probablemente se originan en Neptuno.
- La configuración de la magnetosfera cambia dinámicamente con la rotación planetaria.
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