天体光谱信号的连续谱归一化新方法

A Novel Method for Continuum Normalization of Astronomical Spectrum Signals

采用事先扣除强谱线的策略,提出小波变换与样条拟合相结合的方法进行连续谱拟合,并通过对实际光谱的试验,与较常用的连续谱拟合方法进行比较,结果表明文章提出的方法有明显的优越性。另外,针对多项式拟合等方法得到的连续谱可能会出现负值的情况,推导出有效的连续谱校正公式。

A combined method of wavelet transform and spline fitting is presented for continuum fitting with the strong spectral lines taken out beforehand. Some comparisons between normal methods and the method presented are made by the experiments on actual spectra. And the experimental results show that our method is superior to others.Bsides, an effective continuum revision formula is derived to avoid the appearance of negative continua obtained by some methods such as polynomial fitting and so on.