论文标题
太阳能耀斑环中磁场强度的微波诊断
Microwave diagnostics of magnetic field strengths in solar flaring loops
论文作者
论文摘要
我们已经根据陀螺仪发射理论进行了太阳耀斑环中磁场强度的微波诊断。从Nobeyama Radioheliograph观察到17和34 GHz的三个耀斑事件的观察结果，我们获得了微波通量密度的圆形极化程度和光谱指数，然后将其用于绘制射线后环中的磁场强度。我们的结果表明，在10--25 mm的高度下，磁场强度通常从环路脚接近约800 g降低到〜100 g。还讨论了使用通量绳插入方法将我们的结果与磁场建模进行比较。我们的研究证明了微波成像观测值的潜力，即使在两个频率下，在诊断燃烧区域的冠状磁场时也是如此。
We have performed microwave diagnostics of the magnetic field strengths in solar flare loops based on the theory of gyrosynchrotron emission. From Nobeyama Radioheliograph observations of three flare events at 17 and 34 GHz, we obtained the degree of circular polarization and the spectral index of microwave flux density, which were then used to map the magnetic field strengths in post-flare loops. Our results show that the magnetic field strength typically decreases from ~800 G near the loop footpoints to ~100 G at a height of 10--25 Mm. Comparison of our results with magnetic field modeling using a flux rope insertion method is also discussed. Our study demonstrates the potential of microwave imaging observations, even at only two frequencies, in diagnosing the coronal magnetic field of flaring regions.
