Simulation of the Formation and Morphology of Ice Mantles on Interstellar Grains

摘要: Although still poorly understood, the chemistry that occurs on surfaces of interstellar dust particles profoundly affects growth molecules in theinterstellar medium.An important setof surface reactions producesicymantles manymonolayers cold and dense regions. Themonolayersare dominated bywater ice,but alsocontain CO, CO2, occasionally methanol, as well minor constituents. In this paper, rate production water-ice-dominated mantles is calculated for different physical conditions clouds first time images morphology ices are presented. For purpose, continuous-time random-walk Monte Carlo simulation technique has been used. The visual extinction, density, gas grain temperatures varied. It shown our stochastic approach can reproduce observation ice only grow denser