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Detección de rayos X blandos y una búsqueda sensible de gases nobles en el cometa Hale-Bopp
V A Krasnopolsky1, M J Mumma, M Abbott
1Catholic University of America, Washington, DC 20064, USA. ys2VK@lepvax.gsfc.nasa.gov 20771, USA.
Resumen
El cometa Hale-Bopp fue descubierto.
Área de la Ciencia:
- Ciencia de la ciencia de los cometas.
- La astronomía de rayos X es una astronomía de rayos X.
- La astroquímica es astroquímica.
Sus antecedentes:
- El cometa Hale-Bopp (C/1995 O1) es un cometa prominente observado en rayos X blandos.
- Las observaciones anteriores carecían de un análisis detallado de sus emisiones de rayos X y su composición elemental.
Objetivo del estudio:
- Para analizar las emisiones suaves de rayos X del cometa Hale-Bopp.
- Para determinar la composición elemental del hielo cometario.
- Para investigar las condiciones de formación de hielo cometario.
Principales métodos:
- Imágenes de rayos X suaves del cometa Hale-Bopp.
- Análisis espectroscópico de las emisiones de rayos X.
- Comparación con las abundancias solares y modelos teóricos.
Principales resultados:
- Se detectaron emisiones de rayos X, con una característica central desplazada del núcleo y una característica extendida no correlacionada con chorros de polvo.
- Agotamiento del neón por más de un factor de 25 en relación con la abundancia solar.
- Detección de la emisión de la línea de helio a 584 angstroms, posiblemente de la transferencia de carga del viento solar.
- Observación de la emisión a 538 angstroms atribuida al oxígeno ionizado y el helio.
Conclusiones:
- Es probable que los hielos cometarios en Hale-Bopp se hayan formado a temperaturas superiores a 25 Kelvin.
- Las interacciones del viento solar juegan un papel en las emisiones de rayos X cometarios.
- Las observaciones de rayos X proporcionan una visión única de la composición y los procesos cometarios.
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