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MAVEN observaciones de la respuesta de Marte a una eyección de masa coronal interplanetaria
B M Jakosky1, J M Grebowsky2, J G Luhmann3
1University of Colorado, Boulder, CO, USA. bruce.jakosky@lasp.colorado.edu.
Science (New York, N.Y.)
|November 7, 2015
Resumen
Marte perdió su atmósfera al espacio debido al acoplamiento atmosférico y la pérdida de iones. La misión Mars Atmosphere and Volatile Evolution (MAVEN) estudió el escape de iones durante un evento solar, revelando tasas de pérdida mejoradas que pueden explicar la delgada atmósfera de Marte.
Área de la Ciencia:
- Ciencias planetarias
- Ciencias atmosféricas
- Física del espacio
Sus antecedentes:
- La atmósfera delgada, fría y seca de Marte se atribuye al acoplamiento atmosférico y la pérdida de iones al espacio.
- Comprender la pérdida de iones en curso es crucial para comprender la evolución atmosférica de Marte.
Objetivo del estudio:
- Para investigar la pérdida de iones en el espacio utilizando mediciones exhaustivas de la nave espacial Mars Atmosphere and Volatile Evolution (MAVEN).
- Para analizar el impacto de una eyección de masa coronal interplanetaria en la atmósfera superior y la ionosfera de Marte.
Principales métodos:
- La nave espacial Mars Atmosphere and Volatile Evolution (MAVEN) recogió datos in situ de la atmósfera superior y la ionosfera.
- Las mediciones se tomaron durante un impacto de eyección de masa coronal interplanetaria en marzo de 2015.
- Las observaciones se combinaron con el modelado para evaluar las tasas de fuga de iones.
Principales resultados:
- El estudio observó cambios significativos en el impacto del arco y la capa magnética.
- Se formó una aurora difusa generalizada, y se mejoraron los iones de captación.
- Tanto las observaciones como los modelos indicaron una mayor tasa de escape de iones al espacio durante el evento solar.
Conclusiones:
- La pérdida de iones al espacio durante los eventos solares puede haber contribuido significativamente a la evolución a largo plazo de la atmósfera marciana.
- Los primeros eventos solares podrían haber jugado un papel importante en la configuración de las condiciones atmosféricas actuales de Marte.
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