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Simulation of the Planetary Interior Differentiation Processes in the Laboratory
Published on: November 15, 2013
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Un origen primordial para la similitud de composición entre la Tierra y la Luna
Alessandra Mastrobuono-Battisti1, Hagai B Perets1, Sean N Raymond2
1Department of Physics, Technion, Israel Institute of Technology, Haifa 32000, Israel.
Nature
|April 10, 2015
Resumen
La Tierra y la Luna comparten composiciones isotópicas similares, lo que desafía la hipótesis del impacto gigante. Nuevas simulaciones revelan que los impactantes que forman la Luna a menudo tienen composiciones casi idénticas a las de los planetas que golpean, lo que apoya el escenario de impacto gigante.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- La astrofísica es la astrofísica.
- La geoquímica es la geoquímica.
Sus antecedentes:
- La hipótesis del impacto gigante plantea una colisión entre la Tierra y un cuerpo del tamaño de Marte que formó la Luna.
- Las similitudes isotópicas entre la Tierra y la Luna desafían esto, ya que la composición del impactor debería ser diferente.
- Otros cuerpos del Sistema Solar exhiben distintas composiciones isotópicas.
Objetivo del estudio:
- Para investigar la composición isotópica de los impactos de formación de la Luna dentro de simulaciones de acreción planetaria.
- Para conciliar la similaridad isotópica observada entre la Tierra y la Luna con el escenario de impacto gigante.
Principales métodos:
- Realización de simulaciones de la acreción planetaria.
- Seguimiento de las zonas de alimentación y las composiciones de los planetas en crecimiento y los impactos.
- Analizando la similitud estadística entre las composiciones del planeta y del impactador.
Principales resultados:
- Los planetas que se forman dentro de la misma simulación muestran composiciones distintas.
- Los impactadores gigantes exhiben composiciones estadísticamente similares a los planetas con los que impactan.
- Una porción significativa de los pares planeta-impactor muestran composiciones casi idénticas.
Conclusiones:
- La similitud isotópica entre la Tierra y la Luna es un resultado natural del proceso de impacto gigante.
- El escenario de impacto gigante sigue siendo una explicación viable para la formación de la Luna.
- Las simulaciones apoyan la idea de que los impactadores pueden tener composiciones similares a las de la proto-Tierra.
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