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Erupciones cortinas del terreno del polo sur de Encélado
Joseph N Spitale1, Terry A Hurford2, Alyssa R Rhoden3
1Planetary Science Institute, 1700 East Fort Lowell Road, Suite 106, Tucson, Arizona 85719, USA.
Nature
|May 8, 2015
Resumen
Encélado es el Encélado.
Área de la Ciencia:
- Ciencias planetarias Ciencias planetarias.
- Astrobiología Astrobiología.
- La geofísica es la geofísica.
Sus antecedentes:
- El terreno del polo sur de Encélado presenta fracturas prominentes conocidas como "rayas de tigre".
- Estas rayas de tigre son fuentes confirmadas de vapor de agua y plumas de partículas heladas.
- Estudios anteriores indicaron temperaturas más altas y chorros discretos que emanan de estas fracturas.
Objetivo del estudio:
- Para reevaluar la naturaleza de la actividad eruptiva en el polo sur de Encelado.
- Para caracterizar la distribución espacial y temporal de las emisiones de pluma.
- Proporcionar datos precisos para las teorías que explican el criovolcanismo de Encelado.
Principales métodos:
- Análisis de datos de imágenes de alta resolución de las rayas de tigre.
- Técnicas de triangulación para mapear la actividad de chorro.
- Mapeo de la emisión total a lo largo de las fracturas durante un período de un año (2009-2010).
Principales resultados:
- Gran parte de la actividad eruptiva observada se origina en erupciones amplias, parecidas a cortinas, no en chorros discretos.
- Los aparentes chorros discretos son probablemente ilusiones ópticas causadas por el ángulo de visión y la geometría de la fractura.
- Los mapas revelan los patrones de emisión total a lo largo de las franjas de tigre para múltiples puntos de tiempo.
Conclusiones:
- El estilo eruptivo en el polo sur de Encélado es predominantemente de tipo cortina.
- Es necesario reinterpretar las observaciones anteriores de chorros discretos.
- Comprender el verdadero estilo de emisión es vital para las teorías de formación de penachos de Encelado.
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