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Sobre el polo sur solar: partículas cargadas interplanetarias de baja energía
L J Lanzerotti1, T P Armstrong, R E Gold
1AT&T Bell Laboratories, Murray Hill, NJ 07974, USA.
Science (New York, N.Y.)
|May 19, 1995
Resumen
La hoja de corriente heliosférica moldea significativamente la heliosfera, incluso en las regiones polares. Los choques interplanetarios aceleraron los electrones lejos de Ulises.
Área de la Ciencia:
- Física del espacio Física del espacio.
- Heliofísica es la heliofísica.
- La física del plasma es la física del plasma.
Sus antecedentes:
- La estructura de la heliosfera está influenciada por la actividad solar y los campos magnéticos.
- Comprender el transporte de partículas en la heliosfera es crucial para la predicción del clima espacial.
Objetivo del estudio:
- Para investigar la influencia de la hoja de corriente heliosférica en los flujos de partículas en la región polar sur.
- Analizar los mecanismos de aceleración de iones y electrones de baja energía.
Principales métodos:
- Utilizó datos del instrumento de la heliosfera para el espectro, la composición y la anisotropía (HISCALE) en la nave espacial Ulysses.
- Flujos analizados de iones y electrones de baja energía (> 50 keV) durante cruces polares.
Principales resultados:
- La hoja de corriente heliosférica influyó significativamente en la estructura de la heliosfera hasta -75 grados de latitud helio.
- Los choques inversos interplanetarios aceleraron los electrones lejos de la nave espacial Ulises.
- El flujo de oxígeno anómalo y las relaciones Ne/O se midieron en altas latitudes helio.
Conclusiones:
- La hoja de corriente heliosférica juega un papel dominante en la configuración de la heliosfera.
- La aceleración de las partículas está relacionada con la dinámica de la hoja de corriente y los choques interplanetarios.
- Se necesita más investigación para aclarar las mejoras del flujo de electrones de baja energía en latitudes helio más altas.
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