All Tables

Table 1: Molecular properties of the (hydro)carbon species taking part in the grain growth process. From the left the columns give: the i,m used in the growth rates; the molecule species; the atomic weight; the (constant) sticking coefficient (Eq. (13); these are the same numbers used for $\alpha _i$ and $\alpha ^{{\rm c}}_{i,m}$ in Eqs. (4-7)); the binding energy for each species to a sp³ carbon surface; and the corresponding source of binding energies in the literature.
Table 2: Model parameters, cf. Sect. 3.2. The model names are given in Col. 1. Starting from the left the remaining columns specify: the stellar luminosity L_*; the effective temperature $\ensuremath{T_{\mathrm{eff}}}$ ; the pulsation period P; the pulsation amplitude $\ensuremath{\Delta\,u_{\mathrm{p}}}$ ; and the carbon/oxygen ratio $\ensuremath{\varepsilon_{\mathrm{C}}/\varepsilon_{\mathrm{O}}}$ . The stellar mass M_* is set to $1.0\,M_{\hbox {$\odot $ }}$ in all models.
Table 3: Quantities temporally averaged at the outer boundary for models P13C16U6, P13C14U4, and P10C18U4 (see Sect. 3). Physical features of the different versions of the model are indicated with the model name in the first column. Drift models are denoted by a ``d'' and PC models by a ``p''. Moreover a ``v'' indicates the use of the ``relative'' velocity given in Eq. (12), and an ''s'' the use of non-thermal sputtering. An unused feature is indicated by an ``_''. The following columns give the mean mass loss rate $\ensuremath{\langle\dot{M}\rangle}$ , the mean terminal velocity $\ensuremath{\langle u_{\infty}\rangle}$ , the mean degree of condensation $\ensuremath{\langle f_{\mathrm{cond}}\rangle}$ , the mean dust/gas density ratio $\ensuremath{\langle\ensuremath{\rho_{\mathrm{d}}/\rho}\rangle}$ , and the mean drift velocity $\ensuremath{\langle v_{\mathrm{D}}\rangle}$ , respectively. In addition the standard deviation ( $\ensuremath{\sigma_{\mathrm{s}}}$ ) and the relative fluctuation amplitude $r\,(=\!\ensuremath{\sigma_{\mathrm{s}}} /q)$ are specified for each quantity (q). The values shown in bold face of the quantities of the -dv_ and -dvs models indicate that they differ significantly (by $\ge 10\%$ ) from the corresponding values of the -d__ models. All models show an irregular temporal variability.