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[ascl:2207.017] LOTUS: 1D Non-LTE stellar parameter determination via Equivalent Width method

LOTUS (non-LTE Optimization Tool Utilized for the derivation of atmospheric Stellar parameters) derives stellar parameters via Equivalent Width (EW) method with the assumption of 1D non-local thermodynamic equilibrium. It mainly applies on the spectroscopic data from high resolution spectral survey. It can provide extremely accurate measurement of stellar parameters compared with non-spectroscopic analysis from benchmark stars. LOTUS provides a fast optimizer for obtaining stellar parameters based on Differential Evolution algorithm, well constrained uncertainty of derived stellar parameters from slice-sampling MCMC from PyMC3 (ascl:1610.016), and can interpolate the Curve of Growth from theoretical EW grid under the assumptions of LTE and Non-LTE. It also visualizes excitation and ionization balance when at the optimal combination of stellar parameters.

Code site:
https://github.com/li-yangyang/lotus https://lotus-nlte.readthedocs.io/en/latest/
Described in:
https://ui.adsabs.harvard.edu/abs/2022arXiv220709415L
Bibcode:
2022ascl.soft07017L

Views: 1193

ascl:2207.017
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