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Evolución de la desgasificación del cometa Hale-Bopp (C/1995 O1) a partir de las observaciones por radio
N Biver1, D Bockelée-Morvan, P Colom
1Observatoire de Paris-Meudon, F-92195 Meudon, France.
Science (New York, N.Y.)
|March 28, 1997
Resumen
El cometa Hale-Bopp liberó varios gases a medida que se acercaba al sol. Se observó la sublimación de agua (H2O) de los granos helados, y el coma cambió de monóxido de carbono (CO) a H2O.
Área de la Ciencia:
- Ciencia de la ciencia de los cometas.
- La radioastronomía es la radioastronomía.
- La astroquímica es astroquímica.
Sus antecedentes:
- Los cometas proporcionan información sobre el sistema solar temprano.
- Comprender la desgasificación cometaria es crucial para la ciencia planetaria.
Objetivo del estudio:
- Para analizar la composición de los gases liberados por el cometa Hale-Bopp.
- Para investigar la relación entre las especies volátiles y la distancia solar.
- Para determinar los impulsores de la composición del coma del cometa.
Principales métodos:
- Análisis espectroscópico del cometa Hale-Bopp utilizando radiotelescopios basados en tierra.
- Observación de la composición del coma del cometa a diferentes distancias solares (6.9 a 1.4 UA).
Principales resultados:
- Liberación progresiva de gases que incluyen CO, CH3OH, HCN, H2O, H2S, CS, H2CO, CH3CN y HNC.
- Las especies más volátiles eran abundantes más lejos del sol, pero sin correlación directa con la volatilidad.
- Evidencia de sublimación de H2O de granos de hielo observados más allá de 3,5 UA.
- Una transición de un coma impulsado por CO a un coma impulsado por H2O ocurrió alrededor de 3 UA.
- Aumento de la velocidad de salida de gas y la temperatura a medida que el cometa se acercaba al sol.
Conclusiones:
- La composición del coma del cometa Hale-Bopp evolucionó significativamente con la proximidad solar.
- La radiación solar impulsa la emisión de gases cometarios e influye en la dinámica del coma.
- El estudio proporciona información detallada sobre los procesos de sublimación y la liberación volátil en los cometas.
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