Spectroscopy made easy: A new tool for fitting observations with synthetic spectra

Abstract

— 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 (log gf and van der Waals damping constants), model atmosphere specifications (Teff , log g), elemental abundances, and radial, turbulent, and rotational velocities. LTE synthesis software handles discontiguous spectral intervals and complex atomic blends. As a demonstration, we fit 26 Fe I lines in the NSO Solar Atlas (Kurucz et al. 1984), determining various solar and atomic parameters.

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Cite this paper

@inproceedings{Valenti1996SpectroscopyME, title={Spectroscopy made easy: A new tool for fitting observations with synthetic spectra}, author={Jeff A. Valenti and Nikolai E. Piskunov}, year={1996} }