Sub-Neptune Radii Grids

This repository provides the latest sub-Neptune radii grids from Tang et al. 2025. We include 18 grids covering various pressure levels, ages, and atmospheric metallicities. The files follow the naming format {pressure}_{age}_{metallicity}.csv, where: Pressure levels: 20 mbar, 1 nbar, RCB Ages: 100 Myr, 1 Gyr, 10 Gyr Metallicities: 1×, 50× (in units of solar metallicity) Additionally, the boil-off_{metallicity}.csv grids provide the maximum H/He mass fraction allowed by a boil-off phase. Please refer to these grids to ensure that the chosen model parameters remain physically reasonable. Each radius grid presents radii at the specified pressure level, age, and atmospheric metallicity, while varying the rock/iron core mass, H/He mass fraction, and incident bolometric flux. The grids can be read using: pd.read_csv({pressure}_{age}_{metallicity}.csv, comment='#') For an overview of all grids, see Sub_Neptune_Radius_Grids.pdf. For additional details, please refer to the paper. For additional radii data not included in this repository, please contact [e-mail].