History-independent tracers - Forgetful molecular probes of the physical conditions of the dense interstellar medium

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Table 1

Histories run for each density in the main model grid.

Initial Density/cm⁻³	Temperature/K	Age
100.0	10.0	Freefall time
100.0	30.0	Freefall time
100.0	10.0	Freefall time + 1 Myr
Final	10.0	1 Myr
Final	30.0	1 Myr
–	–	0 Myr

Notes. If the initial density is 100.0 cm⁻³, the model collapsed to the density used in the main model. Otherwise, it started at the required density. The final model represents no chemical evolution.

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