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Scattering And Absorption of Light in Planetary Regoliths
Published on: July 1, 2019
Espectrofotometría de eventos mutuos entre Plutón y Caronte: espectros individuales de Plutón y Caronte
Resumen
Los espectros de Plutón y Caronte revelan distintas composiciones superficiales. Caronte exhibe un espectro neutro, mientras que Plutón muestra bandas significativas de absorción de metano y un tono más rojo.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- La espectroscopia es una técnica de espectroscopia.
- La astronomía es la astronomía.
Sus antecedentes:
- Los eventos mutuos de Plutón y Caronte brindan oportunidades para estudiar sus propiedades superficiales.
- Las observaciones anteriores carecían de información espectral detallada para Caronte.
Objetivo del estudio:
- Obtener y analizar espectros de reflectancia de Plutón y Caronte con resolución temporal durante eventos mutuos.
- Para caracterizar la composición de la superficie y el albedo de ambos cuerpos celestes.
Principales métodos:
- Espectro de resolución temporal adquirido (5,50010,000 Å) durante eventos mutuos entre Plutón y Caronte en 1987.
- Se utilizaron ocultaciones totales para aislar los espectros de Plutón y Caronte.
- Espectro reducido a las reflectancias por relación a las estrellas solares analógicas.
Principales resultados:
- El espectro de reflexión de Caronte no tiene características, sin absorción de metano, muestra un color neutro y un albedo de ~0.37.
- El espectro de Plutón muestra bandas prominentes de absorción de metano (73008900 Å) y un color rojo, con un albedo de ~0.56.
- La banda de metano más débil a 6200 Å no se identificó definitivamente debido a las limitaciones de señal a ruido.
Conclusiones:
- Plutón y Caronte poseen distintas composiciones superficiales, con Plutón rico en metano y Caronte careciendo de él.
- La superficie de Caronte es espectralmente neutral, lo que sugiere una composición o procesamiento diferente en comparación con Plutón.
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