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El viento solar dobla el campo magnético de las trayectorias del polvo de Júpiter
1SN3, NASA Johnson Space Center, Houston, TX 77058, USA. Hamilton, Department of Astronomy, University. zook@snmail.jsc.nasa.gov
Science (New York, N.Y.)
|November 29, 1996
Resumen
La nave espacial Ulises detectó 11 corrientes de polvo desde Júpiter. Estos granos de polvo cósmico eran más rápidos y menos masivos de lo observado anteriormente, influenciados por los campos magnéticos del viento solar.
Área de la Ciencia:
- Física del espacio Física del espacio
- Ciencias planetarias Ciencias planetarias.
- Investigación del polvo cósmico.
Sus antecedentes:
- El detector de polvo cósmico de la nave espacial Ulysses observó estos fenómenos entre septiembre de 1991 y octubre de 1992.
- Investigaciones anteriores sobre el polvo cósmico han establecido rangos de masa y velocidad de referencia.
Objetivo del estudio:
- Para analizar las corrientes de polvo originadas en el sistema joviano.
- Para investigar la influencia de las fuerzas del campo magnético del viento solar en las trayectorias de los granos de polvo.
- Para determinar las características de masa y velocidad de estas corrientes de polvo.
Principales métodos:
- Utilizó mediciones a bordo del detector de polvo cósmico de la nave espacial Ulises.
- Se analizaron los datos del campo magnético registrados por la nave espacial.
- Examinó las direcciones de aproximación de las corrientes de polvo.
Principales resultados:
- Se registraron 11 ráfagas cortas distintas, o corrientes, de polvo que emanaban del sistema joviano.
- Determinado que las masas de grano de polvo son de aproximadamente 10(-18) gramos.
- Velocidades medidas de grano de polvo superiores a 200 kilómetros por segundo.
- Se observó que estas masas y velocidades difieren significativamente de los informes anteriores, siendo aproximadamente 1000 veces menos masivas y 5 a 10 veces más rápidas.
Conclusiones:
- Las corrientes de polvo cósmico del sistema joviano exhiben velocidades significativamente más altas y masas más bajas que las documentadas anteriormente.
- Las fuerzas del campo magnético del viento solar juegan un papel crucial en la configuración de las trayectorias de estos granos de polvo.
- Estos hallazgos proporcionan nuevos conocimientos sobre la dinámica y la composición del polvo dentro del sistema solar.
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