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Origen e implicaciones de la escultura de imbrio no radial en la Luna

Peter H Schultz¹, David A Crawford²

¹Brown University, Department of Earth, Environmental, and Planetary Sciences, 324 Brook Street, Providence, Rhode Island 02912, USA.

|July 23, 2016

Resumen

El impactador Imbrium fue un proto-planeta, no un simple asteroide. Este impacto gigante reformó la Luna y contribuyó al bombardeo temprano del sistema solar.

Área de la Ciencia:

Geología lunar
Ciencias planetarias
Los cráteres de impacto

Sus antecedentes:

La escultura de Imbrium, caracterizada por ranuras y cráteres alrededor de Mare Imbrium, fue tradicionalmente atribuida a un solo impacto oblicuo.
Algunos investigadores han cuestionado esto, señalando características no radiales que sugieren orígenes alternativos.

Objetivo del estudio:

Para investigar el origen de la escultura Imbrium utilizando tendencias no radiales.
Para limitar el tamaño del impactador Imbrium y sus implicaciones para el cinturón de asteroides temprano.
Para evaluar la contribución de los fragmentos del impactador al bombardeo temprano del sistema solar.

Principales métodos:

Análisis de las características no radiales dentro de la escultura Imbrium.
Modelado de la física de impacto y la formación de cráteres.
Comparación con los experimentos de impacto en el laboratorio.

Principales resultados:

El impactador Imbrium fue un gran proto-planeta, aproximadamente la mitad del diámetro de Vesta.
Este hallazgo aumenta las estimaciones de la masa inicial del cinturón de asteroides.
Múltiples fragmentos de impactos oblicuos, como el evento Imbrium, probablemente sobrevivieron y contribuyeron al fuerte bombardeo.

Conclusiones:

El impactador Imbrium fue un proto-planeta sustancial, significativamente más grande de lo que se suponía anteriormente.
El primer cinturón de asteroides era más masivo de lo que sugieren los modelos actuales.
Los fragmentos de impacto jugaron un papel crucial en el período de fuerte bombardeo del sistema solar interior.

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