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Observaciones con el telescopio Subaru del impacto profundo
S Sugita1, T Ootsubo, T Kadono
1Department of Complexity Science and Engineering, University of Tokyo, Kashiwa, Chiba, Japan. sugita@k.u-tokyo.ac.jp
Science (New York, N.Y.)
|September 17, 2005
Resumen
El cráter de impacto de un cometa es complejo. Los datos del Telescopio Subaru revelan que la gravedad controlaba el gran penacho de polvo, pero la expansión volátil también aceleró el polvo del penacho interno.
Área de la Ciencia:
- Ciencia de la ciencia de los cometas.
- Física de los impactos en la física de impacto.
- Geología planetaria y geología planetaria.
Sus antecedentes:
- Comprender los cráteres de impacto de cometas es crucial para interpretar los datos de misiones como Deep Impact.
- La colisión de la sonda Deep Impact con el cometa 9P/Tempel 1 ofrece un estudio de caso único.
Objetivo del estudio:
- Para analizar la dinámica del penacho de polvo después de la colisión del impacto profundo con el cometa 9P/Tempel 1.
- Para determinar las fuerzas primarias que controlan la distribución del polvo expulsado.
Principales métodos:
- Se utilizaron datos de infrarrojo medio de la cámara y espectrómetro enfriado de infrarrojo medio (COMICS) a bordo del telescopio Subaru.
- Analizó la estructura y distribución del penacho de polvo a gran escala.
Principales resultados:
- El estudio identificó una gran masa (aprox. 10^6 kg) de polvo en el penacho.
- El penacho exhibió dos alas que se extendían aproximadamente +/-45 grados, consistente con el control gravitacional.
- La distribución del polvo de la pluma interior indicó una aceleración adicional debido a la evaporación y expansión de los volátiles.
Conclusiones:
- La gravedad fue la fuerza primaria que gobernó la estructura general de la columna de impacto.
- Los procesos volátiles jugaron un papel importante en la aceleración del polvo dentro de las regiones internas de la pluma.
- Estos hallazgos refinan los modelos de la dinámica de los impactos cometarios.
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