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Asimetría térmica en el manto de la Luna inferida de la respuesta de las mareas mensuales

R S Park¹, A Berne², A S Konopliv³

¹Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA. Ryan.S.Park@jpl.nasa.gov.

|May 14, 2025

Resumen

La Luna

Área de la Ciencia:

Geofísica lunar
Ciencias planetarias
Geofísica de la Tierra sólida

Sus antecedentes:

El campo de gravedad de la Luna cambia debido a las fuerzas de marea de la Tierra.
Estos cambios son sensibles a la estructura interna de la Luna.
Los modelos anteriores a menudo asumían un interior lunar simétrico.

Objetivo del estudio:

Para recuperar el campo de gravedad lunar variable en el tiempo usando datos de naves espaciales.
Para determinar el grado 3 de la marea gravitacional el número de amor (k3).
Para investigar la estructura interna de la Luna basada en la respuesta de las mareas.

Principales métodos:

Utilizó datos de la nave espacial GRAIL de la NASA.
Recuperado el campo de gravedad lunar variable en el tiempo.
Calculó el número de marea gravitacional de grado 3 Love (k3).

Principales resultados:

El valor estimado de k3 es 0,0163 ± 0,0007.
Este valor es un 72% más alto de lo esperado para una Luna simétrica.
Un k3 grande sugiere variaciones significativas en el módulo de corte elástico del manto.

Conclusiones:

El interior de la Luna no es esféricamente simétrico.
Las heterogeneidades laterales en el manto lunar profundo se confirman.
Una anomalía térmica persistente en el manto cercano probablemente influye en la geología lunar y la sismicidad.

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