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.
Impact linear polarization observed in a UV chromospheric line during a solar flare
Advances in Space Research ; 2 , 11 ; 155-158
1983-01-01
4 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
The nature of a weak chromospheric flare
TIBKAT | 1965
|British Library Conference Proceedings | 1994
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