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La forma global lunar y la topografía polar derivadas de la altimetría láser Kaguya-LALT

H Araki¹, S Tazawa, H Noda

¹National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan. arakih@miz.nao.ac.jp

Science (New York, N.Y.)

|February 14, 2009

Resumen

Un nuevo mapa topográfico lunar revela una topografía imparcial para la Luna. El análisis sugiere una compensación isostática a grandes escalas y un soporte rígido a escalas más pequeñas, lo que indica una litosfera potencialmente más seca.

Área de la Ciencia:

Ciencias planetarias Ciencias planetarias.
La geofísica es la geofísica.
La ciencia lunar es la ciencia lunar.

Sus antecedentes:

Los modelos topográficos lunares anteriores tenían limitaciones en resolución y precisión.
La comprensión de los mecanismos de apoyo litosférico planetario es crucial para la planetología comparativa.

Objetivo del estudio:

Para crear un mapa topográfico lunar global de alta resolución.
Para investigar los mecanismos de apoyo litosférico en planetas terrestres.

Principales métodos:

Utilizó datos del altímetro láser (LALT) del explorador lunar SELENE.
Realizó análisis armónico esférico en datos topográficos de la Luna, la Tierra, Marte y Venus.

Principales resultados:

Generó un mapa topográfico lunar con una resolución más fina que 0,5 grados.
El nuevo mapa muestra una topografía imparcial para escalas más finas que unos pocos cientos de kilómetros, mejorando el modelo ULCN 2005.
La compensación isostática domina en grandes escalas para todos los cuerpos estudiados.
El soporte rígido simple domina en escalas más pequeñas para la Luna, Venus y Marte.

Conclusiones:

El nuevo mapa lunar proporciona detalles sin precedentes.
El apoyo litosférico a menor escala sugiere una litosfera más seca en la Luna y Venus en comparación con la Tierra.

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