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Polvo interplanetario: análisis de elementos traza de partículas individuales por activación de neutrones

R Ganapathy, D E Brownlee

Science (New York, N.Y.)

|November 30, 1979

Resumen

Los científicos han identificado los primeros micrometeoritos definitivos de los cometas. Estas diminutas partículas espaciales, cruciales para comprender el material del sistema solar primitivo, fueron identificadas por su composición única de oligoelementos.

Área de la Ciencia:

Estudios del polvo cósmico Estudios del polvo cósmico
Ciencias planetarias Ciencias planetarias.

Sus antecedentes:

Se supone que los micrometeoritos cometarios son un componente importante del polvo interplanetario.
La identificación previa de estas partículas ha sido un reto.

Objetivo del estudio:

Para identificar y confirmar el origen de micrometeoritos cometarios de tamaño micrométrico.
Para analizar la composición elemental de las partículas de polvo interplanetario.

Principales métodos:

Análisis de la abundancia de oligoelementos (volátiles y no volátiles).
Comparación de los datos elementales con la composición del material del sistema solar primitivo.

Principales resultados:

Dos partículas específicas fueron definitivamente identificadas como micrometeoritos.
Las partículas identificadas exhiben abundancias de oligoelementos que coinciden con el material primitivo del sistema solar.

Conclusiones:

Este estudio proporciona la primera identificación positiva de micrometeoritos cometarios.
Los hallazgos confirman la presencia y composición del polvo cometario en el espacio interplanetario.

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