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Los granos de polvo de 9P/Tempel 1 antes y después del encuentro con Deep Impact
David E Harker1, Charles E Woodward, Diane H Wooden
1Center for Astrophysics and Space Sciences, University of California, San Diego, 9500 Gilman Drive, Department 0424, La Jolla, CA 92093-0424, USA. dharker@ucsd.edu
Science (New York, N.Y.)
|September 17, 2005
Resumen
Gemini-N observó cambios significativos en el cometa 9P/Tempel 1
Área de la Ciencia:
- Ciencia de la ciencia de los cometas.
- Astrogeología y Astrogeología.
- Física del polvo física del polvo
Sus antecedentes:
- El cometa 9P/Tempel 1 fue estudiado antes y después de la misión Deep Impact.
- Comprender las propiedades del polvo cometario es crucial para la ciencia planetaria.
Objetivo del estudio:
- Para analizar las propiedades espectrales y las características de grano del polvo expulsado del cometa 9P/Tempel 1.
- Para determinar el impacto de la misión Deep Impact en el coma interno del cometa.
Principales métodos:
- Se utilizó espectroscopia infrarroja (7,8 a 13 micrómetros) para observar el coma interno del cometa.
- Análisis de la distribución de la energía espectral y las propiedades derivadas del grano.
- Modelado de la masa de polvo expulsado.
Principales resultados:
- Una característica prominente de emisión de silicato, indicativa de piroxeno amorfo, olivino amorfo y olivino cristalino, se desarrolló dentro de 1 hora después del impacto.
- Se estimó que la masa de polvo expulsado estaba entre 10^4 y 10^6 kilogramos.
- La característica de silicato disminuyó en 26 horas, devolviendo el espectro a su estado anterior al impacto.
Conclusiones:
- La misión Deep Impact causó cambios temporales en la composición y propiedades del polvo cometario.
- El impacto no pareció crear una nueva y persistente región activa en el núcleo del cometa 9P/Tempel 1.
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