Thermal Damping of Weak Magnetosonic Turbulence in the Interstellar Medium

Abstract We present a generic mechanism for the thermal damping of compressive waves in interstellar medium (ISM), occurring due to radiative cooling. solve dispersion relation magnetosonic two-fluid (ion-neutral) system which density- and temperature-dependent heating cooling mechanisms are present. use this relation, addition an analytic approximation nonlinear turbulent cascade, model dissipation weak turbulence. show that some ISM conditions, cutoff wavelength turbulence becomes tens hundreds times larger when is added regular ion-neutral damping. also run numerical simulations, confirm effect has dramatic impact on cascade wave modes.