LTE and Non-LTE Solutions in Gases Interacting with Radiation

In this paper, we study a class of kinetic equations describing radiative transfer in gases which include also the interaction molecules gas with themselves. We discuss several scaling limits and introduce some Euler-like systems coupled radiation as an aftermath specific limits. consider local thermodynamic equilibrium (LTE) holds, well situations assumption fails (non-LTE). The structure gas-radiation system is very different LTE non-LTE cases. prove existence stationary solutions zero velocities to resulting limit models case. non-existence state