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Captura de la nube de Oort del Sol de estrellas en su cúmulo de nacimiento
Harold F Levison1, Martin J Duncan, Ramon Brasser
1Southwest Research Institute, 1050 Walnut Street, Suite 300, Boulder, CO 80302, USA. hal@boulder.swri.edu
Science (New York, N.Y.)
|June 12, 2010
Resumen
La mayoría de los cometas de la nube de Oort probablemente se originaron en otras estrellas, no en nuestro Sol. Las simulaciones numéricas sugieren que el Sol capturó estos cometas de otros discos protoplanetarios estelares durante su formación temprana en un cúmulo de nacimiento.
Área de la Ciencia:
- La astronomía es la astronomía.
- Ciencias planetarias Ciencias planetarias.
- La astrofísica es la astrofísica.
Sus antecedentes:
- Se cree que los cometas de la nube de Oort se formaron en el disco protoplanetario del Sol.
- Estos cometas fueron luego expulsados a órbitas distantes por planetas gigantes.
- Los modelos actuales no logran explicar la población observada de la nube de Oort.
Objetivo del estudio:
- Para investigar el origen de los cometas de la nube de Oort.
- Para abordar la discrepancia entre los modelos y las observaciones con respecto a la población de la nube de Oort.
- Para explorar mecanismos de formación alternativos para los cometas.
Principales métodos:
- Simulaciones numéricas de captura y eyección de cometas.
- Modelado de la formación del Sol dentro de un cúmulo de nacimiento estelar.
- Analizando la interacción entre el joven Sol y los discos protoplanetarios de otras estrellas.
Principales resultados:
- El Sol capturó cometas de otras estrellas mientras estaba en su cúmulo de nacimiento.
- Una porción significativa de los cometas de la nube de Oort puede tener su origen en discos protoplanetarios externos.
- Las simulaciones indican que más del 90% de los cometas podrían ser de origen extrasolar.
Conclusiones:
- El entorno del cúmulo de nacimiento del Sol jugó un papel crucial en la población de la nube de Oort.
- Una fracción sustancial de los cometas de la nube de Oort son probablemente de origen interestelar.
- Este hallazgo desafía la visión tradicional de la formación de cometas únicamente dentro de nuestro sistema solar.
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