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La campaña de observación del Telescopio Espacial Hubble (HST) en el cometa Shoemaker-Levy 9
H A Weaver1, M F A'Hearn, C Arpigny
1Space Telescope Science Institute, Baltimore, MD 21218.
Science (New York, N.Y.)
|March 3, 1995
Resumen
Las observaciones del Hubble del cometa P/Shoemaker-Levy 9 revelaron una actividad cometaria continua y fragmentaciones después de su ruptura. Estos eventos sugieren núcleos distintos, no solo escombros, posiblemente desencadenados por la magnetosfera de Júpiter.
Área de la Ciencia:
- La astronomía es la astronomía.
- Ciencias planetarias Ciencias planetarias.
- Ciencia de los Cometas Ciencia de los Cometas
Sus antecedentes:
- El cometa P/Shoemaker-Levy 9 (SL9) se fragmentó e impactó en Júpiter.
- El Telescopio Espacial Hubble (HST) proporcionó observaciones sistemáticas de los fragmentos del cometa.
Objetivo del estudio:
- Para analizar las observaciones del Hubble del cometa SL9.9.
- Para determinar el tamaño de los fragmentos, la actividad cometaria y el comportamiento de fragmentación.
- Para investigar las posibles causas de las emisiones observadas.
Principales métodos:
- Deconvolución de las imágenes de la cámara planetaria de campo amplio para estimar los diámetros de los fragmentos.
- Análisis de la actividad cometaria a través de la observación de los cometas internos.
- Observaciones espectroscópicas para detectar emisiones (por ejemplo, iones de magnesio, continuo, OH).
Principales resultados:
- Los diámetros de los fragmentos se estiman entre <1 y 4 km.
- Actividad cometaria débil y continua observada hasta finales de junio de 1994.
- Se observó la fragmentación de los núcleos después de la ruptura, desafiando las hipótesis del enjambre de escombros.
- Se detectaron explosiones de iones de magnesio y de emisión continua, posiblemente debido a la carga electrostática en la magnetosfera de Júpiter.
- Se determina el límite superior de la tasa de producción de H2O, sin indicar un objeto pobre en agua.
Conclusiones:
- Los fragmentos del cometa SL9 poseían núcleos distintos y mostraban actividad continua.
- La interacción con la magnetosfera de Júpiter puede haber desencadenado eventos energéticos.
- Las observaciones del Hubble proporcionaron datos cruciales sobre la dinámica y la composición de los cometas.
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