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Updated: May 7, 2026

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Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry
Published on: August 1, 2017
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Las oscilaciones del plasma de electrones aguas arriba del viento solar terminan el choque de terminación
1Department of Physics and Astronomy, University of Iowa, Iowa City, IA 52242, USA. donald-gurnett@uiowa.edu
Resumen
La Voyager 1 detectó oscilaciones de plasma de electrones aguas arriba del choque de terminación del viento solar. Estas ondas cesaron después de que la nave espacial cruzó el choque de terminación en la cubierta heliosférica.
Área de la Ciencia:
- Física del espacio Física del espacio
- Física del plasma es la física del plasma.
- Heliofísica es la heliofísica.
Sus antecedentes:
- El choque de terminación del viento solar marca el límite donde el viento solar supersónico se ralentiza a velocidades subsónicas.
- Comprender el comportamiento del plasma cerca de este límite es crucial para caracterizar la estructura de la heliosfera.
- El instrumento de ondas de plasma de Voyager 1 proporciona mediciones in situ de los fenómenos plasmáticos.
Objetivo del estudio:
- Para informar de la detección de las oscilaciones del plasma de electrones aguas arriba del choque de terminación del viento solar.
- Para analizar las características temporales y espaciales de estas oscilaciones.
- Para utilizar estas observaciones para inferir la ubicación de la nave espacial en relación con el choque de terminación.
Principales métodos:
- Utilizando datos del instrumento de ondas de plasma a bordo de la nave espacial Voyager 1.
- Identificación de las firmas características de las oscilaciones del plasma de electrones en los datos de ondas observadas.
- Correlacionando la ocurrencia de estas oscilaciones con la distancia radial heliocéntrica de la nave espacial.
Principales resultados:
- Las oscilaciones del plasma de electrones se observaron entre el 11 de febrero de 2004 y el 15 de diciembre de 2004.
- Las observaciones se produjeron a distancias radiales heliocéntricas de 91,0 a 94,1 unidades astronómicas.
- La tasa de ocurrencia de estas oscilaciones aumentó gradualmente con el tiempo.
- No se detectaron más oscilaciones del plasma de electrones después del 15 de diciembre de 2004.
Conclusiones:
- Las oscilaciones plasmáticas de electrones observadas son indicativas de la actividad de las ondas plasmáticas aguas arriba del choque de terminación.
- El cese de estas oscilaciones sugiere fuertemente que la Voyager 1 había cruzado el choque de terminación en la envoltura heliosférica.
- Estos hallazgos proporcionan evidencia de la ubicación y la naturaleza del límite heliosférico.
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