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Densidad de los depósitos en capas del polo sur de Marte
Maria T Zuber1, Roger J Phillips, Jeffrey C Andrews-Hanna
1Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139-4307, USA. zuber@mit.edu
Science (New York, N.Y.)
|September 22, 2007
Resumen
La densidad de los depósitos en capas del polo sur de Marte se calculó utilizando datos orbitales. Los resultados sugieren que estas capas de hielo marcianas son principalmente hielo de agua con algo de polvo, refinando nuestra comprensión del agua en Marte.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- La geofísica es la geofísica.
- Astrobiología Astrobiología.
Sus antecedentes:
- Marte posee capas polares de hielo compuestas de depósitos en capas.
- Comprender la composición de estos depósitos es crucial para la ciencia planetaria y la astrobiología.
Objetivo del estudio:
- Para determinar la densidad de los depósitos en capas del polo sur de Marte.
- Para inferir la composición y pureza de las capas de hielo marcianas.
Principales métodos:
- Datos combinados del campo gravitatorio del Orbitador de Reconocimiento de Marte (MRO).
- Topografía de superficie integrada desde el altímetro láser del Mars Orbiter (MOLA).
- Se utilizaron datos de topografía basal del radar avanzado de Marte para sondeo subterráneo e ionosférico (MARSIS).
Principales resultados:
- Se calculó una densidad de mejor ajuste de 1220 kg/m3 para los depósitos estratificados del polo sur.
- Esta densidad es consistente con el hielo de agua que contiene aproximadamente un 15% de polvo mezclado.
- Los hallazgos sugieren que los depósitos están compuestos predominantemente de hielo de agua relativamente limpia.
Conclusiones:
- Es probable que los depósitos en capas del polo sur estén hechos de hielo de agua relativamente puro.
- Esta investigación refina las estimaciones del inventario de agua de superficie en Marte.
- Proporciona información sobre la historia geológica y la potencial habitabilidad de Marte.
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