Ning Zongjun
Source Publicationchinesesciencebulletin
AbstractWith RHESSI data from five solar flares taken from beginning to end, we investigate the power conversion factor kt defined as the ratio of the time derivative of total thermal energy (ERHESSI + Erad + Econd) and the kinetic power (PRHESSI) of nonthermal electrons. Here, EmaESSi is the computed energy contained in thermal plasmas traced by RHESSI SXRs. Other two contributions (Erad and Econd) to the total energy are the energies lost through radiation and conduction, both of which can be derived from the observational data. If both are not considered,/l is only positive before the SXR maximum. However, we find that for each flare studied μ is positive over the whole duration of the soalr flare after taking into account both radiation and conduction. Mean values for μ range from 11.7% to 34.6% for these five events, indicating roughly that about this fraction of the known energy in nonthermal electrons is efficiently transformed into thermal energy from start to end. This fraction is traced by RHESSI SXR observations; the rest is lost. The bulk of the nonthermal energy could heat the plasma low in the atmosphere to drive mass flows (i.e. chromospheric evaporation).
Document Type期刊论文
First Author Affilication中国科学院紫金山天文台
Recommended Citation
GB/T 7714
Ning Zongjun. powerconversionfactorinsolarflares[J]. chinesesciencebulletin,2012,057(012):1397.
APA Ning Zongjun.(2012).powerconversionfactorinsolarflares.chinesesciencebulletin,057(012),1397.
MLA Ning Zongjun."powerconversionfactorinsolarflares".chinesesciencebulletin 057.012(2012):1397.
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