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12:18
Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
Urano: variabilidad del espectro de microondas
Science (New York, N.Y.)
|July 29, 1983
Resumen
Las observaciones de radio revelan Urano.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- La radioastronomía es una radioastronomía.
- Ciencias de la atmósfera Ciencias atmosféricas.
Sus antecedentes:
- Las observaciones radioastronómicas de Urano indican cambios temporales en su espectro de emisión de radio.
- Investigaciones anteriores sugirieron el agotamiento del vapor de amoníaco en la atmósfera de Urano.
Objetivo del estudio:
- Para investigar la evolución temporal del espectro de emisión de radio de Urano.
- Para determinar la composición atmosférica y las condiciones de Urano basado en observaciones de radio.
Principales métodos:
- Análisis de las observaciones radioastronómicas de Urano.
- Comparación de las observaciones de microondas de diferentes períodos de tiempo (1965 a la actualidad).
- Modelado de perfiles de opacidad atmosférica.
Principales resultados:
- El espectro de emisión de radio de Urano está evolucionando con el tiempo.
- Los niveles de amoníaco parecen estar disminuyendo con el tiempo o con la latitud.
- Las observaciones actuales sugieren que el vapor de agua, no el amoníaco, domina la opacidad atmosférica.
- Es poco probable que haya un gradiente térmico polar-equatorial significativo.
Conclusiones:
- El agotamiento del amoníaco en la atmósfera de Urano está respaldado por nuevos datos.
- La composición atmosférica que influye en las emisiones de radio se ha desplazado, posiblemente de amoníaco a vapor de agua.
- Estos cambios se correlacionan con la posición orbital de Urano y la inclinación axial con respecto al Sol.
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