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

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

Sep 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26as..118..595v&link_type=abstract

Astronomy and Astrophysics Supplement, v.118, p.595-603

Astronomy and Astrophysics

Astrophysics

191

Radiative Transfer, Methods: Numerical, Techniques: Spectroscopic, Stars: Fundamental Parameters, Sun: Fundamental Parameters, Atomic Data

Scientific paper

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 (T_ eff_, logg), 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 FeI lines in the NSO Solar Atlas (Kurucz et al. 1984), determining various solar and atomic parameters.

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