Self-consistent Models of Y Dwarf Atmospheres with Water Clouds and Disequilibrium Chemistry

UPDATES:

• This same grid post-processed to have higher spectral resolution, use a more accurate CH4 linelist, and to include disequilibrium CO2 is now available on zenodo here
• A substantial expansion of this grids clear nonequilibrium models is also available on zenodo here

This data set consists of 1d radiative-convective equilibrium models intended for Y Dwarfs or cool giant planets with negligible levels of external irradiation, computed using coolTLUSTY and a recently updated set of molecular absorption cross sections. Models span effective temperatures of 200 - 600 K, metallicities of [-0.5], [0], and [+0.5] dex, and surface gravities of log10(g / [cm/s^2]) = 3.5 - 5.0, and are computed for both cloudy and clear cases, in thermochemical equilibrium and with nonequilibrium carbon and nitrogen chemistry due to vertical mixing. Models extend from 0.5 microns to 300 microns with 30,000 frequency points evenly spaced in ln(frequency), which corresponds to an average resolving power of R ~ 4340.

See README.txt for a description of file formats, naming conventions, and decompressed sizes.

A more thorough summary of the assumptions made in computing these models and a walk-through of their properties can be found in Lacy & Burrows 2023 "Self-consistent Models of Y Dwarf Atmospheres with Water Clouds and Disequilibrium Chemistry" [link].

If you make use of these models please cite that publication, along with this zenodo data set.