Extensive hard X-ray (HXR)/gamma-ray (GR) observations of solar flares, performed during solar cycles 21 and 22 have led to important new discoveries. These data, combined with observations obtained in other parts of the electromagnetic spectrum (soft X-ray, Hard X-ray, optical, and radio) largley contributed to get a better understanding and to develop new ideas on particle acceleration and transport during solar flares. This review presents new observational facts relevant to hard X-ray/gamma-ray producing flares. Among these are the frequent presence of sub-second time structure in the hard X-ray emission, the variability in hard X-ray and radio spatial distributions during a flare and from flare to flare, the evidence for strong gamma-ray line emission from the Corona and the existence of extended phases of the gamma-ray emission lasting for several hours after the flare onset. This ensemble of observations indicates that particle acceleration takes place at different sites in a complex and dynamic magnetic field environment.


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    Title :

    New observational facts about particle acceleration and transport during solar flares


    Contributors:
    Trottel, G. (author)

    Published in:

    Publication date :

    1996-01-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English


    Keywords :



    New Observational Facts About Particle Acceleration and Transport During Solar Flares

    Trottet, G. / COSPAR / Scientific Commission E | British Library Conference Proceedings | 1995




    New Observational Facts About Solar Flares from Ground-Based Observations

    Sakurai, T. / Hiei, E. / COSPAR et al. | British Library Conference Proceedings | 1995