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La dinamo lunar fue la dinamo lunar.

Benjamin P Weiss1, Sonia M Tikoo2

  • 1Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA. bpweiss@mit.edu.

Science (New York, N.Y.)
|December 6, 2014
PubMed
Resumen
Este resumen es generado por máquina.

La Luna una vez tuvo un campo magnético generado por su dínamo central, similar al campo magnético actual de la Tierra. Esta antigua dínamo persistió durante millones de años antes de debilitarse significativamente.

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Área de la Ciencia:

  • Ciencias planetarias Ciencias planetarias.
  • La geofísica es la geofísica.
  • El paleomagnetismo es el paleomagnetismo.

Sus antecedentes:

  • La Luna actualmente carece de un campo magnético global, pero las rocas lunares muestran evidencia de una antigua magnetización.
  • El origen de esta magnetización, ya sea de una dínamo lunar interna o de fuentes externas, era previamente incierto.

Objetivo del estudio:

  • Para determinar si la magnetización de la Luna fue el resultado de una antigua dinamo de núcleo.
  • Para caracterizar la intensidad y la duración de esta antigua dinamo lunar.

Principales métodos:

  • Análisis de las mediciones de laboratorio de las rocas lunares.
  • Evaluación de los datos de las naves espaciales.

Principales resultados:

  • La evidencia sugiere fuertemente que una antigua dínamo del núcleo lunar generó la magnetización observada.
  • El campo dinamo existió desde hace al menos 4.25 a 3.56 mil millones de años.
  • La intensidad del campo era comparable al campo magnético actual de la Tierra, disminuyendo significativamente hace unos 3.300 millones de años.

Conclusiones:

  • La Luna poseía un campo magnético interno robusto generado por una dínamo central en su historia temprana.
  • Los mecanismos de sustento de la dínamo siguen siendo inciertos, posiblemente involucrando la cristalización del núcleo o la convección impulsada por el manto.