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Deuterio en el cometa C/1995 O1 (Hale-Bopp): detección del DCN
R Meier1, T C Owen, D C Jewitt
1University of Hawaii, Institute for Astronomy, 2680 Woodlawn Drive, Honolulu, HI 96822, USA. meier@uhifa.ifa.hawaii.edu
Science (New York, N.Y.)
|March 28, 1998
Resumen
El cianuro de hidrógeno deuterado (DCN) se detectó en el cometa Hale-Bopp, revelando una alta proporción de deuterio/hidrógeno (D/H). Este hallazgo apoya el origen interestelar de los hielos cometarios e implica temperaturas tempranas de formación del sistema solar.
Área de la Ciencia:
- * Astroquímica es la astroquímica.
- * Ciencia de los cometas.
- * Análisis isotópico.
Sus antecedentes:
- * Los cometas son restos del sistema solar primitivo, preservando el material prístino.
- * Las relaciones isotópicas, particularmente deuterio/hidrógeno (D/H), proporcionan información sobre el origen y la evolución de los objetos del sistema solar.
- * Estudios previos indicaron diferentes proporciones de D/H en los cometas, lo que llevó a una mayor investigación.
Objetivo del estudio:
- * Para detectar cianuro de hidrógeno desidratado (DCN) en el cometa C/1995 O1 (Hale-Bopp).
- * Para determinar la relación deuterio/hidrógeno (D/H) en el cianuro de hidrógeno (HCN) dentro del cometa.
- * Para comparar la relación D/H en el HCN con la del agua cometaria para inferir orígenes.
Principales métodos:
- * Utilizó el Telescopio James Clerk Maxwell para las observaciones.
- * Se ha detectado cianuro de hidrógeno desterrado (DCN) en el cometa Hale-Bopp.
- * Calculó la relación D/H en el cianuro de hidrógeno (HCN).
Principales resultados:
- * El cianuro de hidrógeno desidratado (DCN) fue detectado con éxito en el cometa Hale-Bopp.
- * La relación D/H inferida en el cianuro de hidrógeno (HCN) fue de (2,3 +/- 0,4) x 10−3).
- * Esta relación D/H en el HCN es significativamente mayor que la encontrada en el agua cometaria.
Conclusiones:
- * La alta relación D/H en el HCN apoya un origen interestelar para el hielo cometario.
- * Las relaciones D/H observadas tanto en el agua como en el HCN sugieren una temperatura cinética de al menos 30 +/- 10 K en el fragmento de nube interestelar presolar.
- * Este estudio contribuye a la comprensión de las condiciones del sistema solar temprano y los orígenes de sus componentes.
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