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Io: evidencia para el vulcanismo de silicato en 1986
Science (New York, N.Y.)
|December 2, 1988
Resumen
Las observaciones infrarrojas revelaron una importante erupción volcánica en la luna Io de Júpiter en agosto de 1986. El evento, con una temperatura que excede el punto de ebullición del azufre, proporciona una fuerte evidencia de vulcanismo de silicato en Io.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Volcanología Volcanología.
- Astronomía por infrarrojos Astronomía por infrarrojos
Sus antecedentes:
- Io, la luna de Júpiter, es conocida por su intensa actividad volcánica.
- Las observaciones anteriores sugerían eventos volcánicos, pero carecían de datos detallados de temperatura.
Objetivo del estudio:
- Para analizar los datos infrarrojos de Io durante una aparición de Júpiter en 1986.
- Para investigar un evento eruptivo específico en el lado principal de Io.
- Para determinar la temperatura y el tamaño de la fuente volcánica.
Principales métodos:
- Fotometría de infrarrojos en 4.8, 8.7 y 20 micrómetros.
- Análisis de los datos de observación de la aparición de Júpiter en 1986.
- Modelado de la emisión térmica de la fuente eruptiva.
Principales resultados:
- El 7 de agosto de 1986, se detectó un gran evento eruptivo en el lado principal de Io.
- El radio de la fuente se estimó en aproximadamente 15 kilómetros.
- La temperatura del modelo fue de aproximadamente 900 Kelvin, significativamente por encima del punto de ebullición del azufre.
Conclusiones:
- La alta temperatura inferida sugiere fuertemente el volcanismo activo de silicato en Io.
- La actividad volcánica de alta temperatura en el lado principal de Io puede ser más frecuente de lo que se suponía anteriormente.
- Las observaciones de infrarrojos son cruciales para comprender los procesos volcánicos de Io.
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