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Síntesis orgánica a través de la irradiación y calentamiento de los granos de hielo en la nebulosa solar
Fred J Ciesla1, Scott A Sandford
1Department of the Geophysical Sciences, University of Chicago, Chicago, IL 60430, USA. fciesla@uchicago.edu
Science (New York, N.Y.)
|March 31, 2012
Resumen
Las moléculas orgánicas complejas, vitales para la vida, pueden formarse en la nebulosa solar temprana. Los granos de hielo en el disco externo experimentaron condiciones que los experimentos de laboratorio muestran que producen estos compuestos esenciales.
Área de la Ciencia:
- La astroquímica es astroquímica.
- Ciencias planetarias Ciencias planetarias.
- Cosmoquímica es la cosmoquímica.
Sus antecedentes:
- Los compuestos orgánicos complejos se encuentran en meteoritos y cometas, pero su origen es desconocido.
- Estas moléculas son cruciales para la vida en la Tierra.
Objetivo del estudio:
- Investigar el potencial para la producción de moléculas orgánicas complejas dentro de la nebulosa solar.
- Comprender los orígenes de los compuestos orgánicos en los sistemas planetarios.
Principales métodos:
- Seguimiento de la evolución dinámica de los granos de hielo en la nebulosa solar.
- Simulando las condiciones ambientales (temperatura, exposición a los rayos UV) experimentadas por estos granos.
Principales resultados:
- Los granos de hielo del disco solar exterior (por debajo de 30 Kelvin) fueron expuestos a condiciones que imitan experimentos de laboratorio conocidos por producir compuestos orgánicos complejos.
- Estas condiciones incluían una significativa irradiación ultravioleta y un calentamiento térmico.
Conclusiones:
- Los compuestos orgánicos son probablemente subproductos naturales de la evolución del disco protoplanetario.
- Estos compuestos deberían ser componentes fundamentales en la formación de todos los sistemas planetarios, incluido nuestro sistema solar.
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