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La ocurrencia de impactos gigantes durante el crecimiento de los planetas terrestres
Science (New York, N.Y.)
|May 17, 1985
Resumen
Los impactos gigantes durante la formación de planetas, simulados sin arrastre de gas, se alinean con los datos planetarios actuales. Estas colisiones masivas pueden explicar la formación de la Luna y las diferencias atmosféricas entre la Tierra y Venus.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- La astrofísica computacional es una astrofísica computacional.
- La geofísica es la geofísica.
Sus antecedentes:
- Comprender la formación de planetas terrestres es crucial para los estudios de exoplanetas.
- Los modelos anteriores a menudo incluían arrastre de gas, lo que potencialmente simplificaba en exceso la dinámica temprana del sistema solar.
Objetivo del estudio:
- Para simular la acumulación planetesimal sin arrastre de gas.
- Para investigar las características de los impactos gigantes durante la formación de planetas terrestres.
- Para evaluar el papel de estos impactos en la formación de la Tierra temprana y Venus.
Principales métodos:
- Simulaciones tridimensionales de Montecarlo.
- Modelado de las interacciones gravitacionales y colisiones de cuerpos planetarios.
- Excluyendo los efectos del arrastre del gas en la simulación.
Principales resultados:
- La acumulación de planetas simulados coincide en gran medida con el número y la distribución de los planetas terrestres existentes.
- Impactos gigantes identificados, que involucran cuerpos de hasta tres veces la masa de Marte a ~9 km/s, como característica del proceso de acumulación.
- Estos impactos podrían proporcionar el material necesario y el momento angular para la formación de la Luna.
Conclusiones:
- Los impactos gigantes fueron probablemente fundamentales en la formación de planetas terrestres.
- Estos impactos pueden explicar la Luna de la Tierra y las discrepancias de gas inerte atmosférico entre la Tierra y Venus.
- Las simulaciones sin arrastre de gas ofrecen valiosos conocimientos sobre la evolución planetaria temprana.
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