Determining stellar atmospheric parameters and chemical abundances of FGK stars with iSpec

S. Blanco-Cuaresma 1 C. Soubiran 1 U. Heiter P. Jofre 1
1 M2A 2014
L3AB - Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux, OASU - Observatoire aquitain des sciences de l'univers, LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac], Université Sciences et Technologies - Bordeaux 1
Abstract : Context. An increasing number of high-resolution stellar spectra is available today thanks to many past and ongoing extensive spectroscopic surveys. Consequently, the scientific community needs automatic procedures to derive atmospheric parameters and individual element abundances. Aims. Based on the widely known SPECTRUM code by R. O. Gray, we developed an integrated spectroscopic software framework suitable for the determination of atmospheric parameters (i.e., effective temperature, surface gravity, metallicity) and individual chemical abundances. The code, named iSpec and freely distributed, is written mainly in Python and can be used on different platforms. Methods. iSpec can derive atmospheric parameters by using the synthetic spectral fitting technique and the equivalent width method. We validated the performance of both approaches by developing two different pipelines and analyzing the Gaia FGK benchmark stars spectral library. The analysis was complemented with several tests designed to assess other aspects, such as the interpolation of model atmospheres and the performance with lower quality spectra. Results. We provide a code ready to perform automatic stellar spectral analysis. We successfully assessed the results obtained for FGK stars with high-resolution and high signal-to-noise spectra.
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https://hal.archives-ouvertes.fr/hal-01023632
Contributeur : Marie-Paule Pomies <>
Soumis le : mardi 15 juillet 2014 - 09:31:28
Dernière modification le : mercredi 27 juillet 2016 - 14:48:48

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S. Blanco-Cuaresma, C. Soubiran, U. Heiter, P. Jofre. Determining stellar atmospheric parameters and chemical abundances of FGK stars with iSpec. Astronomy and Astrophysics - A&A, EDP Sciences, 2014, 569, pp.id.A111. 〈10.1051/0004-6361/201423945〉. 〈hal-01023632〉

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