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Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses
Published on: July 2, 2012
Observaciones ópticas del cometa Hale-Bopp (C/1995 O1) a grandes distancias heliocéntricas antes del perihelio
H Rauer1, C Arpigny, H Boehnhardt
1Observatoire de Paris-Meudon, 5, Place Jules Janssen, F-92190 Meudon, France. rauer@mesiob.obspm.fr
Science (New York, N.Y.)
|March 28, 1997
Resumen
El cometa Hale-Bopp fue descubierto.
Área de la Ciencia:
- Ciencia de la ciencia de los cometas.
- La astronomía es la astronomía.
- La astrofísica es la astrofísica.
Sus antecedentes:
- La actividad del cometa Hale-Bopp fue estudiada a grandes distancias heliocéntricas.
- Los modelos anteriores lucharon para explicar las intensidades observadas de radicales e iones.
Objetivo del estudio:
- Reexaminar las tasas de producción de NH2 y H2O+ a grandes distancias heliocéntricas.
- Para investigar la fuente de los radicales CN en el cometa Hale-Bopp.
- Para evaluar la sublimación del polvo de los granos de hielo.
Principales métodos:
- Imágenes ópticas mensuales y espectroscopia de ranura larga.
- Monitoreo de la distribución de polvo y gas.
- Análisis de las distancias heliocéntricas de 4.6 a 2.9 UA.
Principales resultados:
- Las intensidades de las bandas de NH2 y H2O+ observadas se desvían de los modelos de fluorescencia existentes.
- No se encontró evidencia de fuentes principales adicionales de CN más allá del HCN.
- Las tasas de producción de polvo y CN sugieren una sublimación significativa de los granos de polvo helado.
Conclusiones:
- Los modelos de fluorescencia existentes necesitan revisión para NH2 y H2O+ a grandes distancias.
- El HCN parece ser la fuente principal de los radicales CN.
- La sublimación de los granos de polvo helado es un proceso clave en la actividad del cometa Hale-Bopp.
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