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Mediciones de polvo en altas latitudes eclípticas.

M Baguhl, D P Hamilton, E Grün

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    Los datos de la nave espacial Ulysses revelaron impactos de polvo interestelar y un flujo adicional de partículas pequeñas en latitudes altas del sur. Estas partículas más pequeñas pueden ser beta-meteoroides expulsados del sistema solar interior.

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    Área de la Ciencia:

    • * La exploración del sistema solar.
    • * Estudios del polvo cósmico.
    • * El Medio Interestelar es el medio

    Sus antecedentes:

    • * La nave espacial Ulises atravesó regiones desde Júpiter hasta el polo sur de la eclíptica.
    • * Comprender la composición y el origen del polvo es crucial para la investigación del sistema solar y el medio interestelar.

    Objetivo del estudio:

    • * Para analizar los datos de impacto de polvo recogidos por la nave espacial Ulysses.
    • * Para identificar el origen y las características de las partículas de polvo detectadas.
    • * Para investigar la naturaleza de un inusual flujo de polvo observado en altas latitudes del sur.

    Principales métodos:

    • * Se utilizaron datos del detector de polvo a bordo de la nave espacial Ulysses.
    • * Tasas de impacto de polvo analizadas e información direccional.
    • * Variaciones correlacionadas del flujo de polvo con la trayectoria de la nave espacial y los fenómenos del sistema solar.

    Principales resultados:

    • * Se midió una variación lenta en la velocidad de impacto del polvo (0,2-0,5 impactos/día).
    • * Se identificó un componente de flujo de polvo dominante originado en una dirección interestelar (100° latitud eclíptica, 280° longitud eclíptica).
    • * Se observó un flujo adicional de partículas pequeñas al sur de -45° de latitud, distinto del polvo interestelar y zodiacal.

    Conclusiones:

    • * El componente primario de polvo detectado tiene un origen interestelar.
    • * El flujo adicional de partículas pequeñas puede representar a los beta-meteoroides.
    • * Los meteoritos beta son potencialmente acelerados por la presión de la radiación solar y las fuerzas electromagnéticas.