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Verdadero desplazamiento polar lunar inferido del hidrógeno polar

M A Siegler^1,2, R S Miller³, J T Keane⁴

¹Planetary Science Institute, Tucson, Arizona 85719, USA.

|March 25, 2016

Resumen

Los depósitos polares de hidrógeno lunar revelan la Luna

Área de la Ciencia:

Geología y geofísica lunares
Ciencias planetarias
Astrobiología

Sus antecedentes:

La historia dinámica y térmica temprana de la Luna sigue siendo poco conocida.
Los depósitos polares de hidrógeno, probablemente hielo de agua, indican regiones permanentemente sombreadas.
La distribución de hidrógeno observada contradice los modelos basados en las temperaturas lunares actuales.

Objetivo del estudio:

Para investigar la distribución espacial del hidrógeno polar lunar.
Para determinar si el eje de rotación de la Luna ha cambiado con el tiempo.
Para vincular las anomalías de hidrógeno polar a la evolución geológica de la Luna.

Principales métodos:

Análisis de la distribución de depósitos polares de hidrógeno mapeado por espectrómetros de neutrones.
Modelado de los momentos de inercia lunares y la reorientación del eje de giro.
La hipótesis de anomalías térmicas como una causa de la verdadera deambular polar.

Principales resultados:

Los depósitos de hidrógeno polares lunares exhiben una distribución antipódica, inconsistente con los modelos térmicos actuales.
Esta distribución indica un cambio significativo en el eje de giro de la Luna (verdadero desplazamiento polar).
Una anomalía térmica de baja densidad debajo de la región Procellarum es identificada como la causa probable.

Conclusiones:

El verdadero desplazamiento polar, iniciado hace miles de millones de años, explica la distribución de hidrógeno observada.
La anomalía térmica de Procellarum, vinculada al volcanismo temprano de la yegua, alteró la densidad y la orientación de la Luna.
El hidrógeno polar registra el suministro de agua antigua y proporciona información sobre la evolución geológica y geofísica de la Luna.

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