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Scattering And Absorption of Light in Planetary Regoliths
Published on: July 1, 2019
Reevaluar la fuente de los cometas de largo período
1Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195-1580, USA. kaib@astro.washington.edu
Science (New York, N.Y.)
|August 1, 2009
Resumen
Las simulaciones numéricas revelan que los objetos interiores de la Nube de Oort son una fuente importante de cometas de largo período (LPC). Este hallazgo ayuda a restringir la Nube de Oort.
Área de la Ciencia:
- La astronomía y la astrofísica.
- Ciencias planetarias Ciencias planetarias.
- Dinámica del sistema solar Dinámica del sistema solar
Sus antecedentes:
- La Nube de Oort es una cáscara esférica teórica de cuerpos helados que se cree que rodean el sistema solar.
- Los cometas de largo período (LPC) se originan en la Nube de Oort y proporcionan información sobre el sistema solar temprano.
- Las vías dinámicas para la producción de LPC desde la Nube de Oort no se comprenden completamente.
Objetivo del estudio:
- Para modelar la producción de cometas observables de largo período (LPC) de la Nube de Oort utilizando simulaciones numéricas.
- Para investigar el papel de los objetos internos de la Nube de Oort en el suministro de LPC al sistema solar interior.
- Para derivar las restricciones observacionales sobre la población y la masa de la nube de Oort interior.
Principales métodos:
- Realizó simulaciones numéricas para modelar la evolución dinámica de los objetos en la Nube de Oort.
- Investigó una vía dinámica específica para que los objetos del interior de la Nube de Oort alcanzaran la órbita de Júpiter.
- Se utilizó la producción simulada de LPC para inferir las propiedades de la población interna de la Nube de Oort.
Principales resultados:
- Los objetos de la Nube de Oort Interior pueden llegar a la órbita de Júpiter a través de una vía dinámica inexplorada.
- Estos objetos se identifican como una fuente significativa, potencialmente dominante, de LPCs observados.
- Restricciones derivadas sobre la población y la masa de la nube de Oort interior, consistentes con las teorías de formación de planetas.
Conclusiones:
- La Nube de Oort interior es una fuente crucial para los cometas de largo período.
- Las propiedades inferidas de la nube de Oort interior se alinean con los modelos existentes de formación de planetas gigantes.
- Las lluvias de cometas a gran escala, como la que potencialmente causó el bombardeo del Eoceno tardío, son eventos raros.
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