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Composiciones de la superficie a través de Plutón y Caronte
W M Grundy1, R P Binzel2, B J Buratti3
1Lowell Observatory, Flagstaff, AZ 86001, USA. w.grundy@lowell.edu.
Science (New York, N.Y.)
|March 19, 2016
Resumen
New Horizons trazó un mapa de Plutón y Caronte, revelando distribuciones complejas de hielo y diversos colores de la superficie de Plutón. Caronte muestra patrones de color más simples con firmas únicas de amoníaco cerca de cráteres de impacto.
Área de la Ciencia:
- Ciencias planetarias
- Astrogeología
- Análisis de la composición de la superficie
Sus antecedentes:
- La misión New Horizons proporcionó datos sin precedentes de cerca de Plutón y Caronte.
- Comprender la composición de la superficie y la geología de estos objetos del Cinturón de Kuiper es crucial para la ciencia planetaria.
Objetivo del estudio:
- Para mapear y analizar los colores y espectros infrarrojos de Plutón y Caronte.
- Comprender la distribución y los procesos que afectan la superficie y las características geológicas de ambos cuerpos celestes.
Principales métodos:
- Utilizó las capacidades de imágenes y mapeo espectral de la nave espacial New Horizons.
- Analizaron datos de color visible y espectros del infrarrojo cercano a través de los hemisferios de encuentro de Plutón y Caronte.
Principales resultados:
- La superficie de Plutón muestra distribuciones complejas de metano, monóxido de carbono y hielos de nitrógeno, influenciados por la sublimación, la condensación y el flujo glacial.
- Se observaron distintas variaciones regionales de color en Plutón, junto con el lecho rocoso de hielo de agua mapeado.
- Caronte exhibe un patrón de color más simple, con latitudes bajas neutrales y una región polar norteña rojiza, y absorción de amoníaco localizada cerca de cráteres de impacto.
Conclusiones:
- Las diversas características de la superficie y las distribuciones de hielo en Plutón están moldeadas por procesos estacionales y geológicos.
- La composición de la superficie de Caronte, particularmente la presencia de amoníaco, ofrece información sobre su actividad geológica y su historia.
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