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Las firmas del campo magnético cerca de la aproximación más cercana de Galileo a Gaspra
Resumen
La nave espacial Galileo detectó rotaciones del campo magnético cerca del asteroide Gaspra, lo que sugiere que tiene un campo magnético. Estos hallazgos indican que Gaspra puede poseer una magnetosfera, que influye en el viento solar circundante.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Física del espacio Física del espacio
- La magnetohidrodinámica es una dinámica magnético-hidrodinámica.
Sus antecedentes:
- Por lo general, se considera que los asteroides carecen de campos magnéticos intrínsecos.
- Comprender los campos magnéticos de los asteroides es crucial para la formación planetaria y los estudios de evolución.
Objetivo del estudio:
- Para investigar la presencia y las características de un campo magnético alrededor del asteroide 951 Gaspra.
- Para interpretar las anomalías del campo magnético observadas por la nave espacial Galileo.
Principales métodos:
- Análisis de los datos del campo magnético de la nave espacial Galileo durante su sobrevuelo de Gaspra.
- Modelado de la interacción del viento solar con un obstáculo magnetosférico potencial.
Principales resultados:
- Observaron dos rotaciones significativas del campo magnético alrededor de la aproximación más cercana de Gaspra.
- La intensidad del campo magnético superficial de Gaspra es comparable a la de la Tierra.
- El momento magnético deducido por unidad de masa cae dentro del rango de los meteoritos de hierro.
Conclusiones:
- Gaspra probablemente posee una magnetosfera, que interactúa con el viento solar.
- Las firmas magnéticas son consistentes con las ondas de modo magnetosónico-silbador.
- Los campos magnéticos de los asteroides pueden ser más comunes de lo que se pensaba.
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