The semi-empirical models of the solar chromosphere are useful in the study of the solar radio emission at millimeter - infrared wavelengths. However, current models do not reproduce the observations of the quiet sun. In this work we present a theoretical study of the radiative transfer equation for four semi- empirical models at these wavelengths. We found that the Chromospheric Solar Milimeter-wave Cavity (CSMC), a region where the atmosphere becomes locally optically thin at millimeter wavelengths, is present in the semi-empirical models under study. We conclude that the CSMC is a general property of the solar chromosphere where the semi-empirical models shows temperature minimum.
De La Luz, V., Chavez, M., & Bertone, E. (2015). The Chromospheric solar millimeter-wave cavity; a common property in the semi-empirical models. Geofisica Internacional, 54(2), 161–166. https://doi.org/10.1016/j.gi.2015.04.011