All Tables

Table 1: Fractionation reactions added to the list given in Roberts & Millar (2000a). The forward rate is $k_{\rm f}$ ; the reverse rate, $k_{\rm r}$ , is given by $k_{\rm f}$ e $^{-\gamma /{\rm T}}$ .
Table 2: Rate coefficients ( $k_{d{\rm r}} = \alpha (T/300)^{\beta }$ ) for the dissociative recombination of H₃⁺ and deuterated analogues.
Table 3: Rate coefficients ( $k~=~\alpha\left({T}/300\right)^{\beta}$ ) for radiative association reactions.
Table 4: The initial abundances, relative to total H, used in the models.
Table 5: A comparison of steady-state molecular D/H ratios from gas-phase models. T=10 K, n(H₂)=10⁴ cm^-3.
Table 6: A comparison of fractionation from the accretion models. T=10 K, n(H₂)=10⁶ cm^-3.
Table 7: Fractional abundances in each model slab (with respect to H₂), as well as total column densities and overall deuterium fractionation predicted for L1544.
Table 8: Fractional abundances in each model slab (with respect to H₂), as well as total column densities and overall deuterium fractionation for Oph D.