SIMBAD references

2020A&A...636A...9A - Astronomy and Astrophysics, volume 636A, 9-9 (2020/4-1)

ODUSSEAS: a machine learning tool to derive effective temperature and metallicity for M dwarf stars.

ANTONIADIS-KARNAVAS A., SOUSA S.G., DELGADO-MENA E., SANTOS N.C., TEIXEIRA G.D.C. and NEVES V.

Abstract (from CDS):


Aims. The derivation of spectroscopic parameters for M dwarf stars is very important in the fields of stellar and exoplanet characterization. The goal of this work is the creation of an automatic computational tool able to quickly and reliably derive the Teff and [Fe/H] of M dwarfs using optical spectra obtained by different spectrographs with different resolutions.
Methods. ODUSSEAS (Observing Dwarfs Using Stellar Spectroscopic Energy-Absorption Shapes) is based on the measurement of the pseudo equivalent widths for more than 4000 stellar absorption lines and on the use of the machine learning Python package "scikit-learn" for predicting the stellar parameters.
Results. We show that our tool is able to derive parameters accurately and with high precision, having precision errors of ∼30K for Teff and ∼0.04dex for [Fe/H]. The results are consistent for spectra with resolutions of between 48000 and 115000 and a signal-to-noise ratio above 20.

Abstract Copyright: © ESO 2020

Journal keyword(s): stars: fundamental parameters - stars: atmospheres - stars: late-type - methods: data analysis - techniques: spectroscopic

Simbad objects: 120

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2021.02.25-23:45:29

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