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La reciente expansión de la atmósfera de Plutón

J L Elliot¹, A Ates, B A Babcock

¹Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA. jle@mit.edu

|July 11, 2003

Resumen

Las observaciones de ocultación estelar de Plutón revelan que su atmósfera se ha expandido desde 1988, contrariamente a las expectativas de colapso. Estos hallazgos proporcionan nuevos conocimientos sobre la estructura atmosférica de Plutón y su respuesta a la distancia solar.

Área de la Ciencia:

Ciencias planetarias Ciencias planetarias.
Ciencias de la atmósfera Ciencias atmosféricas.
La astronomía es la astronomía.

Sus antecedentes:

Las ocultaciones estelares ofrecen perfiles atmosféricos de alta resolución.
Las observaciones anteriores de 1988 de la atmósfera de Plutón sugirieron una estructura isotérmica o una capa de extinción, con preguntas sobre su estabilidad a medida que Plutón se alejaba del Sol.

Objetivo del estudio:

Para investigar los cambios en la atmósfera de Plutón desde 1988.
Para determinar si la atmósfera de Plutón se está derrumbando o expandiendo.
Para analizar la estructura atmosférica de Plutón utilizando datos de ocultación.

Principales métodos:

Observaciones de una ocultación estelar por Plutón en agosto de 2002.
Adquisición de datos a través de longitudes de onda visibles e infrarrojas.
Análisis de las curvas de luz de ocultación para inferir propiedades atmosféricas.

Principales resultados:

Se detectó evidencia de extinción en la atmósfera de Plutón.
La atmósfera de Plutón se ha expandido entre 1988 y 2002.
La expansión observada contradice la hipótesis del colapso atmosférico.

Conclusiones:

La atmósfera de Plutón es dinámica y ha sufrido cambios significativos.
La expansión sugiere una resistencia o un mecanismo diferente que impulsa el comportamiento atmosférico.
Se necesitan más estudios para comprender completamente la evolución atmosférica de Plutón.

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