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Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic
Published on: August 25, 2016
Carbono doblemente ionizado observado en la cola de plasma del cometa Kudo-Fujikawa
Matthew S Povich1, John C Raymond, Geraint H Jones
1Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA. mpovich@cfa.harvard.edu
Science (New York, N.Y.)
|December 13, 2003
Resumen
El cometa C/2002 X5 (Kudo-Fujikawa) reveló una composición de cola única. La alta abundancia de iones de carbono sugiere orígenes de compuestos refractarios orgánicos en el polvo, vinculando los cometas con el material del Sistema Solar.
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 C/2002 X5 (Kudo-Fujikawa) se acercó al perihelio a 0,19 UA.
- Estudios previos sobre la composición y los orígenes de los cometas.
Objetivo del estudio:
- Investigar la composición del cometa C/2002 X5.5.
- Determinar el origen de los iones observados en la cola del cometa.
- Fortalecer el vínculo entre los cometas y la formación del Sistema Solar.
Principales métodos:
- Observación con el Espectrómetro Coronográfico Ultravioleta (UVCS) en el Observatorio Solar y Heliosférico (SOHO).
- Reconstrucción de imágenes de cometas a partir de espectros de alta resolución.
- Análisis de la abundancia de iones, específicamente C+ y C2+.
Principales resultados:
- Se observó una nube de hidrógeno neutro cuasi-esférica.
- Se detectó una cola variable de iones C+ y C2+ que se desconectó y se regeneró.
- Se encontró una alta abundancia de C2+ y C+ (≥24% en relación con el agua).
Conclusiones:
- La alta abundancia de C+ y C2+ no proviene de la fotodisociación del monóxido de carbono.
- Los iones de carbono probablemente se originan a partir de la evaporación y la fotoionización del carbono atómico en los compuestos orgánicos refractarios dentro del polvo cometario.
- Este hallazgo refuerza el papel de los cometas como portadores del material primordial del Sistema Solar.
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