Spectroscopy Made Easy: A New Tool for Fitting Observations with Synthetic Spectra

Spectroscopy Made Easy: A New Tool for Fitting Observations with Synthetic Spectra
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DOI:
10.1051/aas:1996222
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发表时间:
1996-09
期刊:
Astronomy & Astrophysics Supplement Series
影响因子:
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通讯作者:
J. Valenti;N. Piskunov
J. Valenti;N. Piskunov
中科院分区:
其他
文献类型:
--
作者:
J. Valenti;N. Piskunov

文献摘要

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我们描述了一个新的软件包,可用于确定恒星和原子参数相匹配的观测光谱与合成光谱产生的参数化的气氛。一个非线性最小二乘算法是用来解决任何子集的允许参数,其中包括原子数据(loggf和货车德瓦尔斯阻尼常数),模型大气规格(Te,l og g),元素丰度,径向,湍流和旋转速度。LTE合成软件处理不连续的光谱间隔和复杂的原子混合物。作为演示,我们在NSO太阳图集(Kurucz等,1984)中测试了26条Fe I线,确定了各种太阳和原子参数。
We describe a new software package that may be used to determine stellar and atomic parameters by matching observed spectra with synthetic spectra generated from parameterized atmospheres. A nonlinear least squares algorithm is used to solve for any subset of allowed parameters, which include atomic data (loggf and van der Waals damping constants), model atmosphere specications (Te ,l og g), elemental abundances, and radial, turbulent, and rotational velocities. LTE synthesis software handles discontiguous spectral intervals and complex atomic blends. As a demonstration, we t 26 Fe I lines in the NSO Solar Atlas (Kurucz et al. 1984), determining various solar and atomic parameters.