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Temperaturas en Europa desde el fotopolarimetro-radiómetro galileo: anomalías térmicas nocturnas
1Lowell Observatory, 1400 West Mars Hill Road, Flagstaff, AZ 86001, USA. Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109, USA. Goddard Institute for Space Studies, 2880 Broadway, New York, NY 10025, USA.
Science (New York, N.Y.)
|May 29, 1999
Resumen
Galileo Galileo es el nombre de Galileo.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- La astronomía es la astronomía.
- La geofísica es la geofísica.
Sus antecedentes:
- Europa, una luna de Júpiter, es un objetivo de interés por su potencial océano subterráneo.
- Comprender las variaciones de temperatura de la superficie de Europa es crucial para evaluar su habitabilidad y actividad geológica.
Objetivo del estudio:
- Para analizar los datos de emisión térmica de las observaciones de Galileo de Europa.
- Investigar patrones inesperados de temperatura nocturna y sus posibles causas.
Principales métodos:
- Se utilizaron datos del espectrómetro de mapeo del infrarrojo cercano (NIMS) de Galileo.
- Se analizaron las temperaturas diurnas de brillo en las bajas latitudes de Europa.
- Datos de temperatura correlacionados con albedo superficial y características geológicas.
Principales resultados:
- Temperaturas de brillo diurno observadas en latitudes bajas que oscilan entre 86 y 132 Kelvin.
- Se identificaron temperaturas nocturnas anómalas, notablemente altas cerca de la manta de eyección del cráter Pwyll.
- Encontró un mínimo ecuatorial en las temperaturas posteriores a la puesta del sol, independientemente del albedo superficial o la geología.
Conclusiones:
- Las anomalías de temperatura nocturna sugieren variaciones regionales en la inercia térmica o flujos de calor endógenos localizados.
- Estos hallazgos desafían las expectativas teóricas del flujo de calor endogénico en Europa.
- Se necesitan más investigaciones para determinar el origen de estas anomalías térmicas.
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