Beyond the pseudo-time-dependent approach: chemical models of dense core precursors
Beyond the pseudo-time-dependent approach: chemical models of dense core precursors
Context: Chemical models of dense cloud cores often utilize the so-called pseudo-time-dependent approximation, in which the physical conditions are held fixed and uniform as the chemistry occurs. In this approximation, the initial abundances chosen, which are totally atomic in nature except for molecular hydrogen, are artificial. A more detailed approach …