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A Study of the Complexation of Mercury(II) with Dicysteinyl Tetrapeptides by Electrospray Ionization Mass Spectrometry
Published on: January 8, 2016
Regreso a Mercurio: una perspectiva global sobre el primer sobrevuelo de Mercurio del MESSENGER
Sean C Solomon1, Ralph L McNutt, Thomas R Watters
1Department of Terrestrial Magnetism, Carnegie Institution of Washington, Washington, DC 20015, USA. scs@dtm.ciw.edu
Science (New York, N.Y.)
|July 5, 2008
Resumen
La nave espacial MESSENGER reveló que Mercurio es un planeta dinámico con una contracción global evidenciada por las escarpas lobadas. El contenido de hierro en la superficie es inferior al 6%, lo que indica un interior de refrigeración.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- La geofísica es la geofísica.
- Exploración del espacio Exploración espacial
Sus antecedentes:
- La misión MERCURY Surface, Space ENVIRONMENT, GEochemistry y Ranging (MESSENGER) proporcionó nuevos conocimientos sobre el mercurio.
- Los datos anteriores de Mariner 10 ofrecían una comprensión limitada de la historia tectónica de Mercurio.
Objetivo del estudio:
- Para analizar los datos del sobrevuelo de Mercurio de la nave espacial MESSENGER.
- Para investigar los sistemas dinámicos de Mercurio, incluyendo su núcleo, campo magnético, características de la superficie y composición.
Principales métodos:
- Análisis de imágenes capturadas por la nave espacial MESSENGER.
- Mediciones de neutrones térmicos para determinar la composición de la superficie.
Principales resultados:
- El sistema dinámico de Mercurio incluye un núcleo acoplado, un campo magnético e interacciones superficiales con el viento solar.
- Las escarpas lobadas son la forma de tierra tectónica dominante, lo que indica una contracción global significativa debido al enfriamiento planetario.
- La tensión contraccional total es al menos un 33% mayor que la estimada previamente a partir de los datos de Mariner 10.
- La abundancia media de hierro en la superficie es inferior al 6% en peso.
Conclusiones:
- La actividad tectónica de Mercurio y su historia de contracciones están vinculadas a su enfriamiento, volcanismo y formación de cráteres.
- La composición de la superficie del planeta, particularmente su bajo contenido de hierro, proporciona pistas sobre su estructura interna y evolución térmica.
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