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Hielo de agua y compuestos orgánicos en la superficie del asteroide 24 Themis
Humberto Campins1, Kelsey Hargrove, Noemi Pinilla-Alonso
1University of Central Florida, PO Box 162385, Orlando, Florida 32816-2385, USA. campins@physics.ucf.edu
Nature
|April 30, 2010
Resumen
El asteroide 24 Themis muestra la prevalencia de hielo superficial y compuestos orgánicos, apoyando la teoría de que los asteroides entregaron agua a la Tierra. Este descubrimiento ofrece nuevos conocimientos sobre los orígenes del agua planetaria.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- La astronomía es la astronomía.
- Astrobiología Astrobiología.
Sus antecedentes:
- El agua de la Tierra puede haber sido suministrada por asteroides después de la formación de la Luna.
- La actividad similar a la de los cometas en algunos asteroides sugiere la presencia de hielo de agua.
- Estudios anteriores dedujeron pero no midieron directamente el hielo de agua en los asteroides.
Objetivo del estudio:
- Para investigar la composición del asteroide 24 Themis.
- Para confirmar la presencia de hielo de agua y compuestos orgánicos en los asteroides.
- Comprender el origen y la entrega del agua a la Tierra.
Principales métodos:
- La espectroscopia infrarroja se utilizó para analizar la superficie del asteroide 24 Themis.
- Los datos espectrales se compararon con las firmas espectrales conocidas de varios compuestos.
- Se utilizaron resultados independientes para validar la identificación de las características espectrales.
Principales resultados:
- Los espectros infrarrojos revelaron la presencia de hielo de agua y compuestos orgánicos en el asteroide 24 Themis.
- El asteroide 24 Themis exhibe características espectrales únicas en comparación con otros asteroides.
- El hielo superficial extendido es inesperado dada su tasa de sublimación a 3,2 UA.
Conclusiones:
- El asteroide 24 Themis es rico en hielo superficial y materiales orgánicos.
- Los hallazgos apoyan la hipótesis de que un asteroide entregó agua a la Tierra.
- Los embalses subterráneos y los jardines de impacto son explicaciones plausibles para el hielo superficial observado.
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