Fleishman, G.D., Kontar, E.P., Nita, G.M., and Gary, D.E. (2011) A cold, tenuous solar flare: acceleration without heating. Astrophysical Journal Letters, 731 (1). ISSN 2041-8205 (doi:10.1088/2041-8205/731/1/L19)
Full text not currently available from Enlighten.
Publisher's URL: http://dx.doi.org/10.1088/2041-8205/731/1/L19
We report the observation of an unusual cold, tenuous solar flare, which reveals itself via numerous and prominent non-thermal manifestations, while lacking any noticeable thermal emission signature. RHESSI hard X-rays and 0.1-18 GHz radio data from OVSA and Phoenix-2 show copious electron acceleration (1035 electrons s-1 above 10 keV) typical for GOES M-class flares with electrons energies up to 100 keV, but GOES temperatures not exceeding 6.1 MK. The imaging, temporal, and spectral characteristics of the flare have led us to a firm conclusion that the bulk of the microwave continuum emission from this flare was produced directly in the acceleration region. The implications of this finding for the flaring energy release and particle acceleration are discussed.
|Item Type:||Article (Letter)|
|Glasgow Author(s):||Kontar, Dr Eduard|
|Authors:||Fleishman, G.D., Kontar, E.P., Nita, G.M., and Gary, D.E.|
|College/School:||College of Science and Engineering > School of Physics and Astronomy|
|Journal Name:||Astrophysical Journal Letters|
|Published Online:||22 March 2011|