Two-component model of solar plages

By use of the 2-m Mcmath-Pierce telescope at Kitt Peak, the high-quality spectra of a plage with moderate brightness near the center of solar disk were obtained. The data include seven spectral lines, which are Hα, Hβ, CaII H and K lines and the infrared triplet. With the consideration of fine structures of solar plages, a two-component atmospheric model is constructed by keeping the cool component to be the quiet atmosphere. Three cases of the hot component are given for different filling factors where the temperature and density distribution are adjusted in order to reproduce the seven observed spectral profiles. We also briefly discuss the influence of the column density at the base of the corona, m0, and the macro-turbulent velocity on the required filling factor and computed profiles. The two-component model is compared with precious one-component semi-empirical models. The limitation of the model is pointed out and further improvement is indicated.     

太阳谱斑的一个半经验模型

利用美国基特峰口径2 m的太阳塔获得了日面中心附近中等亮度的谱斑的高质量光谱,包括Hα,Hβ,CaⅡ H和K线以及红外三重线等7条光谱线轮廓.在平面平行层大气的假设下,通过迭代求解流体静力学平衡方程、统计平衡方程和辐射转移方程,计算得到该谱斑的半经验大气模型.它可以很好地再生观测到的7条谱线轮廓.把这个谱斑大气模型与已有的两个进行了比较,并且讨论了今后进一步改进的方向.     

利用倾斜镜对太阳像作平场处理

提出一种利用高速倾斜反射镜对太阳像进行平场处理的新方法。介绍了此方法的原理和实际工作过程，并给出了实验结果。结果表明，应用高速倾斜反射镜可以非常有效地对太阳像进行平场处理，提高太阳像成像质量。