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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
La exosfera de Mercurio: observaciones durante el primer sobrevuelo de Mercurio del MESSENGER
William E McClintock1, E Todd Bradley, Ronald J Vervack
1Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80303, USA. william.mcclintock@lasp.colorado.edu
Science (New York, N.Y.)
|July 5, 2008
Resumen
El Mensajero de Dios.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Física del espacio Física del espacio
- Ciencias de la atmósfera Ciencias atmosféricas.
Sus antecedentes:
- Mercurio posee una exosfera tenue, distinta de una atmósfera densa.
- Comprender la composición y la dinámica exosférica de Mercurio es crucial para la ciencia planetaria.
- Las observaciones anteriores fueron limitadas, lo que requirió mediciones in situ.
Objetivo del estudio:
- Para analizar las emisiones exosféricas de Mercurio durante el primer sobrevuelo de la nave espacial MESSENGER.
- Investigar las variaciones y distribuciones espaciales de las especies exosféricas.
- Identificar los procesos responsables de generar y mantener la exosfera de Mercurio.
Principales métodos:
- Utilizó el espectrómetro de composición atmosférica y de superficie de Mercurio (MASCS) a bordo del MESSENGER.
- Las emisiones medidas de sodio, calcio e hidrógeno en la exosfera de Mercurio.
- Analizó las variaciones espaciales de estos elementos durante el sobrevuelo.
Principales resultados:
- Se detectaron emisiones de cola de sodio antisunward, junto con calcio y sodio cerca de la superficie.
- Hidrógeno observado a gran altitud en el lado diurno del planeta.
- Las variaciones espaciales sugirieron múltiples fuentes y mecanismos de pérdida para las especies exosféricas.
Conclusiones:
- La exosfera de Mercurio está formada por interacciones complejas.
- El viento solar y los procesos magnetosféricos influyen significativamente en la distribución de las especies exosféricas.
- Los hallazgos proporcionan información sobre la dinámica exosférica y la evolución de Mercurio.
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