The SPHINX M-dwarf Spectral Grid. I. Benchmarking New Model Atmospheres to Derive Fundamental M-Dwarf Properties

NEW UPDATE:::::::::::::VERSION 4

MODEL GRID AND SUPPLEMENTARY FIGURES for The SPHINX M-dwarf Spectral Grid. I. Benchmarking New Model Atmospheres to Derive Fundamental M-Dwarf Properties:

(1) MODEL GRID: Zip file titled 'SPHINX_MODELS_MLT_1.zip' contains a directory (376MB on disk) that is divided into three folders: ATMS, SPECTRA, and ABUNDANCES. All models here assume mixing length parameter of 1. For more info, we direct the reader to the paper.

The ATMS directory contains thermal profiles/atmospheres of all models. (Temperature in K, Pressure in bars)

The SPECTRA directory contains synthetic spectra. (Wavelength--0.1 to 20 microns, Flux in W/m2/m, R~250)

The ABUNDANCES directory contains mixing ratios of all atomic and molecular species included in these models.

(2) SUPPLEMENTARY FIGURES:

The plot files are named as 'target name' _ corner.

Each file is a corner plot of posterior probability distributions from grid-model fit of low-resolution spectra of benchmark M dwarfs using the SPHINX model grid. We also include posterior distributions of Starfish (Czekala et al.2015) hyperparameters to properly constrain model and data systematics. The vertical blue lines in the plots indicate values from observations (empirically derived [M/H] from Mann et al. 2013 and interferometrically measured radii from Boyajian et al. 2012b).

File named Gl436_mixinglength shows difference in grid model fit assuming mixing length parameter 1 vs 0.5.

File named Gl725B_spot shows difference in grid model fit assuming stellar photospheric heterogeneity vs without.

If you use our stellar atmosphere models, please remember to cite both the zenodo doi for the open source data as well as the paper. Thank you!

--> link to published paper