Linearization Method for Fitting the Infrared Spectrum of the Late Type Stars

Some fitting methods are discussed for the models of the infrared spectra of the late type stars, and the practical fitting method, i.e. the linearization method (Taylor series method) is given for the "double-blackbody model" fitting of the late type stars with circumstellar dust shells. Based on the fitting results and the computer programming, advantages and shortages about the linearization method are also discussed in the paper.