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Voyager 1 en el foreshock, el choque de terminación y el heliosheath
R B Decker1, S M Krimigis, E C Roelof
1Applied Physics Laboratory, Johns Hopkins University, Laurel, MD 20723, USA. robert.decker@jhuapl.edu
Science (New York, N.Y.)
|September 24, 2005
Resumen
La Voyager 1 detectó un aumento de la intensidad de las partículas energéticas y el flujo del viento solar hacia adentro, lo que indica que cruzó el choque de terminación heliosférica (TS) en 2004. La nave espacial se ha mantenido en la heliosfera desde entonces.
Área de la Ciencia:
- La física espacial es la física del espacio.
- Heliofísica es la heliofísica.
- La física del plasma es la física del plasma.
Sus antecedentes:
- La Voyager 1 (V1) comenzó a medir partículas energéticas del choque de terminación heliosférica (TS) en el año 2002.
- Las intensidades de las partículas aumentaron a medida que V1 se movía más profundamente en el TS de partículas energéticas para el choque.
Objetivo del estudio:
- Para analizar las observaciones de la Voyager 1 de las intensidades de las partículas energéticas y el flujo del viento solar.
- Para determinar el momento y la ubicación del cruce de choque de terminación heliosférica por parte de la Voyager 1.
Principales métodos:
- Análisis de datos energéticos de iones y electrones de la Voyager 1.
- Estimación de la velocidad de flujo radial del viento solar.
- Análisis espectral de datos de protones energéticos.
Principales resultados:
- V1 observó fluctuaciones, grandes intensidades de iones y electrones energéticos a lo largo de 2004.
- Un aumento significativo de la intensidad y el aumento sostenido se produjo alrededor del día 350 de 2004.
- El flujo del viento solar cambió de exterior a interior (hacia el sol) alrededor del día 351 de 2004.
Conclusiones:
- La Voyager 1 cruzó el choque de terminación heliosférica el día 2004/351 a 94,0 unidades astronómicas.
- El cruce ocurrió cuando el impacto se movió hacia adentro debido a la disminución de la presión del viento solar.
- La Voyager 1 ha permanecido en la cubierta heliocéntrica desde el cruce, con observaciones dominadas por iones de captura interestelares calentados.
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