SPHINX: M-Dwarf Stellar Atmosphere Models and Synthetic Spectra

Arizona State University researcher Aishwarya Iyer provides a 376MB grid of model atmospheres and synthetic spectra for M-dwarf stars. The data includes thermal profiles, spectra covering 0.1 to 20 microns, and chemical abundance mixing ratios. Supplementary figures show posterior probability distributions from fitting the models to benchmark M-dwarf observations.

Use Cases

• Deriving stellar properties like metallicity and radius based on synthetic spectra covering 0.1 to 20 microns.
• Benchmarking new atmospheric models using provided thermal profiles (temperature and pressure).
• Analyzing the impact of stellar parameters like mixing length on model fits using the included comparison files.
• Studying chemical compositions of M dwarfs based on mixing ratios of atomic and molecular species.

Strengths

• Includes a 376MB model grid with three distinct data types: atmospheres, spectra, and abundances.
• Synthetic spectra have a defined wavelength range from 0.1 to 20 microns and a resolution of R~250.
• Supplementary figures provide empirical validation by comparing model fits to interferometrically measured radii and derived metallicities.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and total number of models in the grid are unknown, which may limit suitability assessment.
• Last update date is unknown; freshness unverified.

Provenance

Source

Aishwarya Iyer, Arizona State University, via paperswithcode and Zenodo.

Collection Method

Computational model outputs from stellar atmosphere simulations.