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光谱模板技术可以生成任意恒星的光谱,解决了许多恒星缺少光谱观测数据的问题,在星空背景建模中具有重要作用。对传统的光谱模板技术予以改进。首先,提出了辐射计“框架”修正法,不仅修正了红外天文卫星ISO测得的中等分辨率光谱SWS的非线性失真,而且改善了Engelke幂函数修正法存在的工作量大和人为误差问题。其次,基于修正后的SWS光谱,并结合恒星大气模型数据库ATLAS9,建立了一套归一化光谱模板库。最后,通过将指定恒星所属的光谱模板与该恒星的Engelke连续谱函数相乘实现了任意恒星红外光谱的生成。实例验证表明,改进的光谱模板技术不仅提高了所生成恒星光谱的分辨率,而且大大减小了光谱与高质量辐射计的偏差。
Spectral template technology can generate the spectrum of any star, which solves the problem of lack of spectral observation data in many stars and plays an important role in the modeling of the star background. The traditional spectral template technology to be improved. First of all, the radiometer “frame ” correction method is proposed, which not only corrects the nonlinear distortion of medium resolution spectrum SWS measured by infrared astronomy satellite ISO, but also improves the heavy workload and human error of Engelke’s power function correction method . Secondly, based on the modified SWS spectrum, combined with ATLAS9, a set of normalized spectral template library was established. Finally, the generation of an arbitrary star’s infrared spectrum is achieved by multiplying the spectral template to which the specified star belongs by the Engelke continuum function of the star. The experimental results show that the improved spectral template technique not only improves the resolution of the generated star spectrum, but also greatly reduces the deviation of the spectrum from the high quality radiometer.