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El descubrimiento del calcio en la atmósfera de Mercurio
T A Bida1, R M Killen, T H Morgan
1W.M. Keck Observatory, CARA, Kamuela, Hawaii 96743, USA. tbida@keck.hawaii.edu
Nature
|March 21, 2000
Resumen
Los científicos descubrieron el calcio en Mercurio.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Química de la atmósfera La química de la atmósfera
Sus antecedentes:
- La composición de la corteza de Mercurio y su evolución siguen siendo inciertas.
- La composición anidra y refractaria prevista contrasta con los volátiles atmosféricos observados.
- Se cree que la composición de la atmósfera se origina en los materiales de la superficie a través de varios procesos.
Objetivo del estudio:
- Para investigar la presencia y el origen del calcio en la atmósfera de Mercurio.
- Comprender los procesos que contribuyen a la composición atmosférica de Mercurio.
Principales métodos:
- Observación del calcio en la atmósfera de Mercurio cerca de los polos.
- Análisis de la densidad y temperatura de la columna atmosférica.
Principales resultados:
- Descubrimiento de calcio en la atmósfera cerca de los polos de Mercurio.
- Se observó baja densidad de columna y alta temperatura (12.000 K) para el calcio atmosférico.
- La distribución localizada sugiere un posible vínculo con las zonas aurorales.
Conclusiones:
- El calcio atmosférico puede originarse de la pulverización inducida por iones en las zonas aurorales.
- La baja abundancia sugiere un regolito empobrecido de calcio en Mercurio.
- Los hallazgos desafían las suposiciones anteriores sobre la composición de la superficie de Mercurio.
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