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Una tercera capa esporádica en la ionosfera de Marte
M Pätzold1, S Tellmann, B Häusler
1Institut für Geophysik und Meteorologie, Universität zu Köln, Cologne, Germany. paetzold@geo.uni-koeln.de
Science (New York, N.Y.)
|November 8, 2005
Resumen
Una tercera capa recién observada en la ionosfera de Marte, detectada por el Mars Express Orbiter, aparece esporádicamente. Este hallazgo desafía las predicciones anteriores de una capa ionosférica inferior permanente y continua en el Planeta Rojo.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- La aeronomía es la aeronomía.
- Física del espacio Física del espacio
Sus antecedentes:
- La ionosfera marciana suele exhibir una estructura de dos capas.
- Los modelos anteriores predijeron una capa ionosférica inferior permanente y continua en Marte.
- Se planteó la hipótesis de que el origen de esta capa inferior era la ablación de meteoritos y el intercambio de cargas.
Objetivo del estudio:
- Para investigar la presencia y las características de una posible tercera capa ionosférica en Marte.
- Para comparar los datos de observación con los modelos teóricos existentes de la ionosfera marciana.
Principales métodos:
- Utilizando datos del Experimento de Ciencias de la Radio del Mars Express Orbiter.
- Analizando 120 perfiles de densidad de electrones de la ionosfera marciana.
- Identificación y caracterización de las capas ionosféricas anómalas.
Principales resultados:
- Se observó una tercera capa ionosférica en 10 de los 120 perfiles de densidad de electrones.
- Esta capa fue detectada a altitudes entre 65 y 110 kilómetros.
- Las densidades de electrones en esta capa alcanzaron un pico promedio de 0.8 x 10^10 m^-3.
- La capa observada parecía ser esporádica y localizada, no permanente y continua.
Conclusiones:
- La capa ionosférica inferior en Marte no es permanente y continua como se predijo anteriormente.
- La naturaleza esporádica de esta capa sugiere mecanismos de formación localizados y transitorios.
- Se necesita más investigación para comprender completamente los orígenes y la dinámica de esta capa ionosférica marciana inferior.
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