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Hielo de agua cristalina en el objeto del cinturón de Kuiper (50000) Quaoar
1Institute for Astronomy, 2680 Woodlawn Drive, Honolulu, Hawaii 96822, USA. jewitt@hawaii.edu
Nature
|December 14, 2004
Resumen
El objeto del cinturón de Kuiper Quaoar muestra signos de hielo de agua cristalina e hidrato de amoníaco, lo que sugiere una reaparición reciente. Esto indica que los procesos dinámicos están activos en los cuerpos primitivos del Sistema Solar.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- La astronomía es la astronomía.
- Exploración del sistema solar Exploración del sistema solar
Sus antecedentes:
- El cinturón de Kuiper, una región más allá de Neptuno, alberga materiales primitivos del Sistema Solar.
- La mayoría de los objetos del cinturón de Kuiper (KBOs) son demasiado débiles para un análisis detallado de la composición.
- Las temperaturas superficiales en el cinturón de Kuiper son extremadamente bajas (aprox. 50 K). es decir, 50 K).
Objetivo del estudio:
- Para investigar la composición de la superficie del gran objeto del cinturón de Kuiper (50000) Quaoar.
- Comprender la preservación y la alteración potencial de los hielos en el cinturón de Kuiper.
Principales métodos:
- Observaciones en el infrarrojo cercano de (50000) Quaoar.
- Análisis espectroscópico para identificar materiales de superficie.
Principales resultados:
- Detección de hielo de agua cristalina en la superficie de Quaoar.
- Identificación del hidrato de amoníaco.
- La evidencia sugiere que el hielo se ha calentado a al menos 110 K.
Conclusiones:
- La presencia de hielo cristalino e hidrato de amoníaco indica un reciente resurgimiento de Quaoar.
- Los posibles mecanismos de rejuvenecimiento de la superficie incluyen la exposición al impacto o la actividad criovolcánica.
- Estos hallazgos sugieren procesos geológicos activos en los KBOs a pesar de las bajas temperaturas.
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