Table 2: Variation of the carbon overabundance $\epsilon _{\rm C/O}$ for otherwise fixed parameters.
  $\epsilon _{\rm C/O}$ Periods $\vert\dot M\vert$ $\langle \alpha \rangle$ $v_\infty$ $\rho_{\rm d/g}$
Type: LMC $M = 0.8~M_\odot$, T = 2800 K, $L = 15~000~L_\odot$,
    P = 400 d, $\Delta v = 5$ km s-1
  1.30 Expansion after 110 P: <10 $R_\star$
  1.50 Expansion after $\phantom{1}$90 P: <25 $R_\star$
  1.70 70-90 3.51e-05 6.10 18.83 2.01e-3
  1.80 70-90 3.30e-05 3.92 21.04 2.68e-3
  2.50 70-90 4.58e-05 6.03 30.16 7.13e-3
Type: SMC $M = 1.0~M_\odot$, T = 2600 K, $L = 11~000~L_\odot$,
    P = 650 d, $\Delta v = 5$ km s-1
  1.30 Expansion after 150 P: <35 $R_\star$
$\alpha < 1$ 1.50 70-150 7.17e-07 0.06 3.23 1.69e-4
  1.70 70-150 4.74e-06 0.11 4.95 1.17e-3
  1.80 70-150 3.69e-05 1.26 8.56 1.82e-3
[-1.5ex] $\alpha > 1$ 2.00 70-150 4.55e-05 2.19 10.61 2.75e-3
Type: SMC $M = 0.8~M_\odot$, T = 2800 K, $L = 10~000~L_\odot$,
    P = 600 d, $\Delta v = 5$ km s-1
  1.30 130-150 1.24e-07 0.27 1.91 1.93e-9
[-1.5ex] $\alpha < 1$ 1.50 70-150 8.90e-07 0.21 3.75 4.74e-4
  1.70 70-150 1.72e-05 1.02 8.31 1.27e-3
$\alpha > 1$ 1.80 70-150 2.88e-05 2.04 10.57 1.75e-3
  2.00 70-150 3.76e-05 3.11 12.10 2.89e-3

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