Impact of the desorption energy of atomic oxygen on the chemical evolution in star-forming regions

Resumo

The impact of a recently measured values of the desorption energy of oxygen released from the surface of silicate dust particles on the results of numerical simulations is analyzed. The chemical evolution of the interstellar medium under conditions corresponding to those in a cold, dark cloud is considered, together with the collapse of a translucent cloud into a dark cloud. Astrochemical modeling methods are used to show that, overall, there were no substantial changes in the chemical evolution under the conditions for the selected models for these objects, but the formation of somemolecules is sensitive to the change from the traditionally adopted oxygen desorption energy (800 K) to the new value (1850 K). The characteristics of the formation of such molecules are analyzed.