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El espectrómetro de masas de la sonda Galileo: composición de la atmósfera de Júpiter
H B Niemann1, S K Atreya, G R Carignan
1Goddard Space Flight Center, Greenbelt, MD 20771, USA.
Resumen
Los datos de la sonda Galileo revelan que Júpiter también es Júpiter.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Química de la atmósfera La química de la atmósfera
- La geoquímica de los isótopos es la geoquímica de los isótopos.
Sus antecedentes:
- La composición atmosférica de Júpiter proporciona información sobre el sistema solar temprano.
- Las mediciones anteriores de los gases nobles y isótopos de Júpiter eran limitadas.
Objetivo del estudio:
- Para determinar la composición detallada de la atmósfera de Júpiter.
- Para comparar las abundancias elementales e isotópicas de Júpiter con los valores solares e interestelares.
- Para investigar los orígenes de los componentes atmosféricos de Júpiter.
Principales métodos:
- Análisis in situ de la atmósfera de Júpiter utilizando un espectrómetro de masas cuádrupolo en la sonda Galileo.
- Medición de las proporciones de mezcla de gases y las proporciones isotópicas de 0,5 a 21 bar.
Principales resultados:
- La relación helio-hidrógeno está cerca de la solar.
- Las abundancias de carbono, azufre y oxígeno se desvían significativamente de los valores solares.
- La abundancia de neones es un orden de magnitud más bajo que la solar.
- Las proporciones isotópicas de carbono y gases nobles son similares a las del Sol.
- Las proporciones de deuterio a hidrógeno y helio-3 a helio-4 proporcionan nuevas restricciones sobre la composición protosolar y la evolución solar.
Conclusiones:
- La atmósfera de Júpiter refleja una compleja historia de formación con distintos enriquecimientos elementales.
- Las mediciones isotópicas apoyan los modelos de evolución del sistema solar, incluida la conversión del deuterio en helio-3.
- Los datos de la sonda Galileo ofrecen un punto de referencia para los estudios atmosféricos de Júpiter.
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