Imaging observations of solar flare hard X-ray sources with the Hard X-ray Telescope (HXT) aboard the Yohkoh satellite have revealed that hard X-ray emissions (greater than 30 ke V) originate most frequently from double sources. The double sources are located on both sides of the magnetic neutral line, suggesting that the bulk of hard X-rays is emitted from footpoints of flaring magnetic loops. We also found that hard X-rays from the double sources are emitted simultaneously within a fraction of second and that the weaker source tends to be located in the stronger magnetic field region, showing a softer spectrum. Physcial implications on the observed characteristics of the hard X-ray double sources are discussed.


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    Title :

    Characteristics of hard X-ray double sources in impulsive solar flares


    Contributors:
    Sakao, T. (author) / Kosugi, T. (author) / Masuda, S. (author) / Yaji, K. (author) / Inda-Koide, M. (author) / Makishima, K. (author)

    Published in:

    Publication date :

    1996-01-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English


    Keywords :


    Characteristics of Hard X-Ray Double Sources in Impulsive Solar Flares

    Sakao, T. / Kosugi, T. / Masuda, S. et al. | British Library Conference Proceedings | 1995





    Impulsive X-Ray Brightenings in Solar Flares

    Savy, S. K. / COSPAR / Scientific Commission E | British Library Conference Proceedings | 1995