tonalli: an asexual genetic code to characterize APOGEE-2 stellar spectra. I. Validation with synthetic and solar spectra.
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| Název: | tonalli: an asexual genetic code to characterize APOGEE-2 stellar spectra. I. Validation with synthetic and solar spectra. |
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| Autoři: | Adame, Lucía, Román-Zúñiga, Carlos, Hernández, Jesús, López-Valdivia, Ricardo, Sánchez, Edilberto |
| Zdroj: | RAS Techniques & Instruments; 2024, Vol. 3 Issue 1, p771-799, 29p |
| Témata: | STELLAR spectra, GENETIC algorithms, ASTRONOMICAL observations, SPECTRUM analysis, MONTE Carlo method, POWER spectra, TEMPERATURE of stars |
| Abstrakt: | We present tonalli , a spectroscopic analysis python code that efficiently predicts effective temperature, stellar surface gravity, metallicity, |$\alpha$| -element abundance, and rotational and radial velocities for stars with effective temperatures between 3200 and 6250 K, observed with the Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2). tonalli implements an asexual genetic algorithm to optimize the finding of the best comparison between a target spectrum and the continuum-normalized synthetic spectra library from the Model Atmospheres with a Radiative and Convective Scheme (MARCS), which is interpolated in each generation. Using simulated observed spectra and the APOGEE-2 solar spectrum of Vesta, we study the performance, limitations, accuracy, and precision of our tool. Finally, a Monte Carlo realization was implemented to estimate the uncertainties of each derived stellar parameter. [ABSTRACT FROM AUTHOR] |
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| Databáze: | Complementary Index |
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