Abstract Linear polarization was observed in the S I 1437Å line in bright flaring points during the soft X-ray emission. The degree of polarization is about 25% and is detected at a signal to noise ratio of 2.9. The polarized electric vector is directed towards disk center to within 3°. This polarization could be due to collisional excitationm of S I by energetic electrons beamed in the vertical direction. We suggest that the heat flux in the region interconnecting the transition zone to the high chromosphere during the gradual phase of a flare could lead to an anisotropic excitation. Then the observed polarization would be due to vertical motions of the transition zone sweeping the preexisting chromosphere.


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    Title :

    Impact linear polarization observed in a UV chromospheric line during a solar flare


    Contributors:
    Henoux, J.C. (author) / Chambe, G. (author) / Semel, M. (author) / Woodgate, B. (author) / Shine, R. (author) / Beckers, J. (author)

    Published in:

    Advances in Space Research ; 2 , 11 ; 155-158


    Publication date :

    1983-01-01


    Size :

    4 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



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