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MESSENGER observaciones de carga y descarga extremas de la cola magnética de Mercurio
James A Slavin1, Brian J Anderson, Daniel N Baker
1Heliophysics Science Division, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA. james.a.slavin@nasa.gov
Resumen
Mercurio Mercurio Mercurio Mercurio es Mercurio.
Área de la Ciencia:
- Ciencias espaciales, ciencias planetarias y física del plasma.
Sus antecedentes:
- La magnetosfera de Mercurio exhibe una carga magnética extrema en la cola, que excede significativamente la de la Tierra.
- Las subtormentas terrestres, impulsadas por la carga magnética de la cola, ofrecen un modelo comparativo para la dinámica magnetosférica de Mercurio.
Objetivo del estudio:
- Para investigar las características e implicaciones de la carga de la cola magnética durante las subtormentas magnetosféricas de Mercurio.
- Para comparar la intensidad y las escalas de tiempo de las subtormentas de Mercurio con las observadas en la Tierra.
Principales métodos:
- Análisis de los datos del campo magnético del tercer sobrevuelo de MESSENGER por Mercurio.
- Comparación de las mejoras observadas en el campo de la cola con los datos de subtormentas terrestres y modelos magnetosféricos.
Principales resultados:
- El campo magnético observado aumenta en la cola de Mercurio por factores de 2 a 3.5 en intervalos de 2-3 minutos.
- La carga de la cola de Mercurio es aproximadamente 10 veces más intensa que la de la Tierra.
- Las duraciones de mejora del campo de cola se correlacionan con el ciclo de Dungey, lo que sugiere que rige las escalas de tiempo de subtormentas.
Conclusiones:
- Las subtormentas de Mercurio son significativamente más intensas que las de la Tierra, a pesar de la falta de aceleración de partículas energéticas observadas.
- La circulación de plasma, tal como se describe en el ciclo de Dungey, es un factor clave para determinar la duración de las subtormentas en la magnetosfera de Mercurio.
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