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

Published online by Cambridge University Press:  28 July 2017

Celia Fierro-Santillán ,
Janos Zsargó ,
Jaime Klapp ,
Santiago Alfredo Díaz-Azuara ,
Anabel Arrieta  and
Lorena Arias
Celia Fierro-Santillán
Affiliation:
Centro de Matemática Aplicada y Cómputo de Alto Rendimiento ABACUS-CINVESTAV, Carretera México-Toluca km 38.5, 52740 Estado de México, México. email: celia.fierro.estrellas@gmail.com
Janos Zsargó
Affiliation:
Escuela Superior de Física y Matemáticas, Instituto Politécnico Nacional, México.
Jaime Klapp
Affiliation:
Centro de Matemática Aplicada y Cómputo de Alto Rendimiento ABACUS-CINVESTAV, Carretera México-Toluca km 38.5, 52740 Estado de México, México. email: celia.fierro.estrellas@gmail.com Instituto Nacional de Investigaciones Nucleares, México.
Santiago Alfredo Díaz-Azuara
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México, México.
Anabel Arrieta
Affiliation:
Universidad Iberoamericana, México.
Lorena Arias
Affiliation:
Universidad Iberoamericana, México.
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Abstract

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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 Teff.

Keywords

stars: atmospheresstars: abundancesstars: rotationstars: winds
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S329: The Lives and Death-Throes of Massive Stars , November 2016 , pp. 397
Copyright
Copyright © International Astronomical Union 2017 

References

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