Implications of time-dependent molecular chemistry in metal-poor dwarf stars

Open Access

Table 3

Time to equilibrium for all models and key molecular species at a temperature of 3500 K and a gas density of 10⁻⁹ g cm⁻³, corresponding to the upper photospheric convection cells.

Model	t_eqm(C₂) (s)	t_eqm(CH) (s)	t_eqm(CN) (s)	t_eqm(CO) (s)	t_eqm(OH) (s)
AM1	4.5 × 10²	1.0 × 10³	2.4 × 10³	1.7 × 10²	1.7 × 10²
AM2	5.7 × 10³	5.1 × 10³	6.3 × 10⁴	3.9 × 10³	3.2 × 10³
AM3	4.9 × 10⁴	2.4 × 10⁴	2.4 × 10⁵	4.0 × 10⁴	1.3 × 10⁴

AC1	9.0 × 10³	7.7 × 10³	1.6 × 10⁴	1.6 × 10³	1.6 × 10³
AC2	2.2 × 10³	1.2 × 10³	2.4 × 10³	1.8 × 10³	2.4 × 10³

Notes. Due to the time-stepping of the solver, these times are not exact, but they provide a useful picture of how quickly various species set into equilibrium at varying chemical compositions.

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