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Evolución de colisión rápida de los cometas durante la formación de la nube de Oort
1Space Studies Department, Southwest Research Institute, Boulder, Colorado 80302, USA. astern@swri.edu
Nature
|February 24, 2001
Resumen
Las colisiones físicas, no solo la gravedad, impactan significativamente la eyección del cometa a la nube de Oort. Estas colisiones pueden limitar el número de cometas que llegan al sistema solar exterior.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- La astrofísica es la astrofísica.
- Formación del sistema solar Formación del sistema solar
Sus antecedentes:
- Se cree que la nube de Oort se formó a partir de cuerpos helados expulsados por planetas gigantes.
- Los modelos anteriores simularon la formación de la nube de Oort utilizando sólo las influencias gravitacionales.
Objetivo del estudio:
- Para investigar el papel de las colisiones físicas en la eyección de cometas a la nube de Oort.
- Reevaluar los modelos existentes de formación de la nube de Oort.
Principales métodos:
- Simulaciones dinámicas que incorporan efectos gravitacionales y colisiones físicas.
- Análisis de la evolución de colisión de los cometas dentro de la nebulosa protosolar.
Principales resultados:
- Las colisiones físicas juegan un papel crucial, hasta ahora inexplorado, en la eyección de cometas.
- Las vidas de erosión de los cometas son más cortas que las escalas de tiempo de eyección dinámica en regiones nebulosas densas.
- Las colisiones pueden evitar el escape generalizado del cometa hasta que la masa del disco disminuya.
Conclusiones:
- Los procesos de colisión son un factor fundamental en la formación de la nube de Oort.
- La masa total de los cometas en la nube de Oort podría ser sobreestimada.
- Los modelos futuros deben incluir efectos de colisión para estudios precisos de la evolución del sistema solar.
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