Sonora Cholla: A Grid of Cloud-free, Solar Metallicity Models in Chemical Disequilibrium for the JWST Era

<p>Exoplanet and brown dwarf atmospheres commonly show signs of disequilibrium chemistry. In the James Webb Space Telescope&nbsp;era high resolution spectra of directly &nbsp;imaged exoplanets will allow the characterization of their atmospheres in more detail, and allow systematic tests for the &nbsp;presence of chemical species that deviate from thermochemical equilibrium in these atmospheres. Constraining &nbsp;the presence of disequilibrium chemistry in these atmospheres as a function of parameters &nbsp;such as their effective temperature and surface gravity will allow us to &nbsp;place better constrains in the physics governing these atmospheres.</p> <p>This database&nbsp;contains&nbsp;a grid of cloud-free, solar metallicity &nbsp;atmospheres for brown dwarfs and wide separation giant planets with key molecular species such as&nbsp;CH₄, H₂O, CO and NH₃ &nbsp;in disequilibrium. The grid covers atmospheres with T_eff~[500 K,1300 K], log<em>g</em>~[3.0,5.5] (cgs) and an eddy diffusion parameter &nbsp;of log K_zz=2, 4 and 7 (cgs). A description of the code and a study of the effect of different parameters&nbsp;within the grid on the temperature and composition profiles of our atmospheres is presented in the accompanying paper &quot;The Sonora Substellar Atmosphere Models. II.&nbsp;Cholla: A Grid of Cloud-free, Solar &nbsp;Metallicity Models in Chemical Disequilibrium for the<em> JWST&nbsp;</em>Era&quot; (accepted to ApJ, Oct. 2021)</p>