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Analysis and fit of stellar spectra using a mega-database of CMFGEN models

  • Celia Fierro-Santillán (a1), Janos Zsargó (a2), Jaime Klapp (a1) (a3), Santiago Alfredo Díaz-Azuara (a4), Anabel Arrieta (a5) and Lorena Arias (a5)...

Abstract

We present a tool for analysis and fit of stellar spectra using a mega database of 15,000 atmosphere models for OB stars. We have developed software tools, which allow us to find the model that best fits to an observed spectrum, comparing equivalent widths and line ratios in the observed spectrum with all models of the database. We use the Hα, Hβ, Hγ, and Hδ lines as criterion of stellar gravity and ratios of He II λ4541/He I λ4471, He II λ4200/(He I+He II λ4026), He II λ4541/He I λ4387, and He II λ4200/He I λ4144 as criterion of T eff.

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Copyright

References

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Hillier, D. J. & Miller, D., 1998, ApJ, 496, 407
Hubeny, I, Lanz, T., 1995, ApJ, 439, 875
Sota, A. et al. 2011, ApJS, 193 (2), 24
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Keywords

Analysis and fit of stellar spectra using a mega-database of CMFGEN models

  • Celia Fierro-Santillán (a1), Janos Zsargó (a2), Jaime Klapp (a1) (a3), Santiago Alfredo Díaz-Azuara (a4), Anabel Arrieta (a5) and Lorena Arias (a5)...

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