对ASO-S/HXI观测到的太阳耀斑中诺珀特效应的统计研究
A Statistical Investigation of the Neupert Effect in Solar Flares Observed with ASO-S/HXI
AI总结：
本文利用ASO-S/HXI观测数据对149个太阳耀斑进行统计分析，验证了诺珀特效应，发现HXR积分通量与SXR峰值通量呈线性关系且相关系数均高于0.90。
摘要：
诺珀特效应指的是太阳耀斑中常见的软X射线（SXR）光变曲线与时间积分的硬X射线（HXR）或微波通量之间的强相关性。本文利用新发射的先进天基太阳天文台（ASO-S）上的硬X射线成像仪（HXI）来研究太阳耀斑期间的诺珀特效应。通过检查20-50 keV的HXR光变曲线，选取了149个覆盖耀斑脉冲相的事件样本。随后，我们对HXR积分通量（即HXR通量的时间积分）与地球静止环境业务卫星（GOES）测得的1-8 Å软X射线通量进行了互相关分析。所有选定的耀斑均显示出高相关系数（>0.90），且似乎与耀斑位置和级别无关。HXR积分通量倾向于随SXR峰值通量线性增加。我们的观测结果表明，所有选定的耀斑都遵循诺珀特效应。
英文摘要：
The Neupert effect refers to the strong correlation between the soft X-ray (SXR) light curve and the time-integrated hard X-rays (HXR) or microwave flux, which is frequently observed in solar flares. In this article, we therefore utilized the newly launched Hard X-ray Imager (HXI) on board the Advanced Space-based Solar Observatory to investigate the Neupert effect during solar flares. By checking the HXR light curves at 20-50 keV, a sample of 149 events that cover the flare impulsive phase were selected. Then, we performed a cross-correlation analysis between the HXR fluence (i.e., the time integral of the HXR flux) and the SXR 1-8 A flux measured by the Geostationary Operational Environmental Satellite. All the selected flares show high correlation coefficients (>0.90), which seem to be independent of the flare location and class. The HXR fluences tend to increase linearly with the SXR peak fluxes. Our observations indicate that all the selected flares obey the Neupert effect.
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