The association of nonthermal electrons with non-flaring coronal transients |
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| Authors: | D F Webb M R Kundu |
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| Institution: | (1) American Science and Engineering, Inc., 02139 Cambridge, Mass., U.S.A.;(2) Astronomy Program, University of Maryland, 20742 College Park, Md., U.S.A. |
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| Abstract: | A close temporal and spatial association has been found between erupting filaments/coronal transients and radio noise storm continua. The three transients studied occurred away from active regions and are members of a class not usually accompanied by chromospheric emission. The data analyzed were from the S-054 soft X-ray telescope on Skylab and from one- and two-dimensional interferometers at meter and decameter wavelengths at Nançay and Clark Lake observatories. Calculations confirmed that observed microwave radiation from the transients is due to thermal bremsstrahlung. The results are consistent with an interpretation of heating of an increased amount of coronal plasma by nonthermal, 10–100 keV electrons. Three possibilities for the source of the material are described: (1) The filament material; (2) evaporation from the chromosphere or transition region; and (3) via a long-lived reconnection process. |
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