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El antiguo legado del hielo de agua en el sistema solar

L Ilsedore Cleeves¹, Edwin A Bergin², Conel M O'D Alexander³

¹Department of Astronomy, University of Michigan, 311 West Hall, 1085 South University Avenue, Ann Arbor, MI 48109, USA. cleeves@umich.edu.

Science (New York, N.Y.)

|September 27, 2014

Resumen

La nebulosa solar es la nebulosa solar.

Área de la Ciencia:

Astrobiología y Ciencias Planetarias.
La astroquímica es astroquímica.
Origen del agua del sistema solar El agua del sistema solar.

Sus antecedentes:

El origen acuático de la Tierra es clave para comprender los orígenes de la vida y los entornos extraterrestres.
El agua del sistema solar muestra enriquecimientos de deuterio a hidrógeno, lo que indica una química iónica a baja temperatura.
Las fuentes potenciales incluyen la nube molecular madre o el disco protoplanetario de la nebulosa solar.

Objetivo del estudio:

Para investigar el papel del disco protoplanetario de la nebulosa solar en la formación de agua deuterada.
Para evaluar la viabilidad del disco como la principal fuente de agua del sistema solar.
Comprender las implicaciones para la disponibilidad de hielo interestelar en otros sistemas planetarios.

Principales métodos:

Modelado integral de los procesos de ionización del disco.
Análisis de las vías de deuterio impulsadas por iones en la formación de agua.
Evaluación de la eficiencia de la producción de agua deuterada dentro del disco protoplanetario.

Principales resultados:

Se descubrió que las vías de deuterio impulsadas por iones para la formación de agua en el disco son ineficientes.
La capacidad del disco protoplanetario de la nebulosa solar para producir agua deuterada se ve significativamente reducida.
Es poco probable que el disco sea la única fuente de agua del sistema solar.

Conclusiones:

Los hielos interestelares son probablemente una fuente significativa de agua en el sistema solar.
Si la formación del sistema solar es típica, abundantes hielos interestelares están disponibles para los sistemas planetarios nacientes.
Este hallazgo amplía el potencial de entornos propicios para la vida más allá de nuestro sistema solar.

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