Document detail
ID

oai:arXiv.org:2411.15342

Topic
Astrophysics - Instrumentation and... Astrophysics - Astrophysics of Gal... Astrophysics - Solar and Stellar A...
Author
Adame, Lucía Román-Zúñiga, Carlos Hernández, Jesús López-Valdivia, Ricardo Sánchez, Edilberto
Category

sciences: astrophysics

Year

2024

listing date

11/27/2024

Keywords
apogee-2 library continuum-normalised tonalli astrophysics
Metrics

Abstract

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 optimise the finding of the best comparison between a target spectrum and the continuum-normalised 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 realisation was implemented to estimate the uncertainties of each derived stellar parameter.

The ad hoc continuum-normalised library is publicly available on Zenodo (DOI 10.5281/zenodo.12736546).

;Comment: 35 pages, 22 figures.

Accepted to RASTI.

Supplemental continuum-normalised library available at: 10.5281/zenodo.12736546

Adame, Lucía,Román-Zúñiga, Carlos,Hernández, Jesús,López-Valdivia, Ricardo,Sánchez, Edilberto, 2024, tonalli: an asexual genetic code to characterise APOGEE-2 stellar spectra. I. Validation with synthetic and solar spectra

Document

Open

Share

Source

Articles recommended by ES/IODE AI