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Scattering And Absorption of Light in Planetary Regoliths
Published on: July 1, 2019
Naturaleza del absorbente ultravioleta en las nubes de Venus: inferencias basadas en los datos de Venus Pioneer
Resumen
La absorción de rayos ultravioleta en Venus es muy pequeña.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Ciencias de la atmósfera Ciencias atmosféricas.
- Astrobiología Astrobiología.
Sus antecedentes:
- Las mediciones fotométricas del orbitador y las sondas Pioneer Venus revelan una significativa absorción ultravioleta en la región de la nube principal de Venus.
- Se observa poca absorción por encima de las nubes o dentro de las primeras profundidades ópticas.
Objetivo del estudio:
- Para identificar la fuente de absorción ultravioleta en la atmósfera de Venus.
- Para probar varios modelos propuestos de composición de la nube contra los datos de observación.
Principales métodos:
- Se realizaron cálculos de transferencia radiativa para simular las condiciones atmosféricas de Venus.
- Las simulaciones se compararon tanto con la Pioneer Venus como con datos fotométricos basados en tierra.
Principales resultados:
- Los modelos que involucran dióxido de nitrógeno, material meteorítico y metales volátiles fueron descartados como la fuente principal de absorción de rayos UV.
- Los modelos con partículas de azufre (1-10 micrómetros) presentaron desafíos significativos.
- Los modelos que incorporan gas de dióxido de azufre mostraron ser prometedores para explicar los patrones de absorción observados.
Conclusiones:
- El gas de dióxido de azufre es un candidato probable para la absorción ultravioleta observada en las nubes de Venus.
- Se necesita más investigación para refinar los modelos de dióxido de azufre y comprender completamente la química atmosférica de Venus.
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