基于线指数线性回归的恒星光谱大气物理参数测量

Stellar Spectrum Parameter Measurement Based on Line Index by Linear Regression

利用Lick线指数,根据光谱的海量特点,从统计回归的角度出发,通过线性回归的方法来设计大气物理参数测量的高效算法。线性回归通过选择最佳的线指数组合及回归类型的选择来使其达到最佳的回归效果。因为得到的是公式性的回归模型,所以使得其应用于新的数据时计算速度可以很快,且清晰明了,便于分析处理,这是其他方法所达不到的。实验结果证明,通过线指数回归的方法来进行大气物理参数的测量是可行的。

Using the Lick line index, according to the magnanimity characteristics of the spectrum an efficient algorithm of the atmospheric physical parameters measurement by the linear regression method from the point of view of statistical regression was designed. The linear regression was used to achieve the best regression effect by selecting the type of regression and the composi- tion of line index. The formula obtained from the regression model makes the computation speed fast when applied to new data, and the clarity and ease of analysis processing can not be reached by other methods. The experimental results show that through the llne index regression method to get the atmospheric physical parameters is feasible.