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Published on: February 12, 2013
Observaciones infrarrojas del sistema de Neptuno
Science (New York, N.Y.)
|December 15, 1989
Resumen
La Voyager 2 es una nave espacial.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Física de la atmósfera Física de la atmósfera
- La espectroscopia es una técnica de espectroscopia.
Sus antecedentes:
- La composición atmosférica y la estructura térmica de Neptuno no se habían caracterizado previamente.
- Comprender el clima de Neptuno es crucial para la planetología comparativa del sistema solar exterior.
Objetivo del estudio:
- Para analizar la emisión térmica y los espectros de radiación solar reflejada de Neptuno.
- Para obtener perfiles y mapas de temperatura atmosférica.
- Para investigar la dinámica y composición atmosférica de Neptuno.
Principales métodos:
- Utilizó el espectrómetro interferómetro infrarrojo de la Voyager 2 para el análisis espectral.
- Empleó un radiómetro de banda ancha para mediciones visibles e infrarrojas cercanas.
- Se analizaron las características de emisión de acetileno (C2H2) y se obtuvieron perfiles de temperatura de 30 a 1000 milibares.
Principales resultados:
- Se estima que la fracción de moléculas de acetileno de Neptuno está entre 9 x 10 (−8) y 9 x 10 (−7).
- Mapas de temperatura generados que revelan polos más cálidos y el ecuador con latitudes medias más frías, similar a Urano.
- Observaron una disminución general de la velocidad del viento con la altura e identificaron estructuras térmicas onduladas, algunas vinculadas a la Gran Mancha Oscura.
Conclusiones:
- La distribución de la temperatura atmosférica de Neptuno muestra similitudes con Urano a pesar de las diferentes características planetarias.
- Se caracterizaron las dinámicas atmosféricas, incluida la cizalladura del viento y las ondas térmicas.
- La temperatura efectiva preliminar de Neptuno se estima en 59,3 K; la temperatura de la superficie de Tritón se estima en 38 K.
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