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Detección de una característica de absorción profunda de 3 micras en el espectro de Amalthea (JV)
Naruhisa Takato1, Schelte J Bus, Hiroshi Terada
1Subaru Telescope, National Astronomical Observatory of Japan, 650 North Aohoku Place, Hilo, Hawaii 96720, USA. takato@naoj.org
Science (New York, N.Y.)
|December 25, 2004
Resumen
Espectro de Júpiter Espectro de Júpiter es el espectro de Júpiter.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- La astronomía es la astronomía.
- La espectroscopia es una técnica de espectroscopia.
Sus antecedentes:
- Las lunas internas de Júpiter, Amalthea y Thebe, exhiben propiedades espectrales únicas.
- Su composición puede ofrecer pistas sobre el sistema solar primitivo.
Objetivo del estudio:
- Para analizar el espectro del infrarrojo cercano de Amaltea y Tebas.
- Para determinar el origen y la composición de sus materiales de superficie.
Principales métodos:
- Espectroscopia del infrarrojo cercano (0,8 2,5 micrómetros y 3 micrómetros).
- Comparación de espectros de satélites con asteroides tipo D y Callisto.
Principales resultados:
- Los espectros de Amalthea y Thebe se asemejan a los asteroides tipo D.
- Una característica de absorción significativa a 3 micrómetros en el lado trasero de Amalthea sugiere minerales hidratados, similares a los componentes sin hielo de Callisto.
Conclusiones:
- Los materiales de superficie observados son inconsistentes con la formación dentro de una nebulosa circumjoviana en sus órbitas actuales.
- Amalthea y Thebe probablemente representan restos de planetesimales formados en el sistema solar exterior o más allá.
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