Chirality and Magnetic Configurations of Solar Filaments

摘要: It has been revealed that the magnetic topology in solar atmosphere displays hemispheric preference, i.e., negative/positive helicity northern/southern hemisphere, respectively. However, strength of rule and its cyclic variation are controversial. In this paper, we apply a new method based on filament drainage to 571 erupting filaments from 2010 May 2015 December order determine chirality preference. is found $91.6\%$ our sample follow sign. preference quiescent decreases slightly $\sim$$97\%$ rising phase $\sim$$85\%$ declining cycle 24, whereas intermediate keeps high value around $96\pm4\%$ all time. Only active-region show significant variations. Their rises $\sim$$63\%$ $\sim$$95\%$ phase, $82\pm5\%$ during phase. Furthermore, half-year period maximum, their totally vanishes. Besides, also diagnose configurations indirect method, events, $89\%$ inverse-polarity with flux rope configuration, $11\%$ normal-polarity sheared arcade configuration.