Table 1
Initial binary model set-up.
| Parameter | Unit | Initial value |
|---|---|---|
| Mp | (M⊙) | 1.5 |
| Rp,accr | (R⊙) | 258 |
| Tp | (K) | 3000 |
| Ms | (M⊙) | 1 |
| Rs,accr | (R⊙) | 8.6(a), 2.15(b) |
| a | (au) | 6 |
![$\[\dot{M}\]$](/articles/aa/full_html/2024/11/aa50338-24/aa50338-24-eq6.png){kind=small} |
(M⊙ yr−1) | 10−7 |
| tmax | (yr) | 93 |
| Rbound | (au) | 250(a), 20(b) |
| μ | 2.38(a), 1.26(b) | |
| γ | 1.2 |
Notes. Superscript (a) indicates values that are only used in Sect. 3 for the analysis of the impact of H I cooling, and superscript (b) for the accretion disk models discussed in Sect. 4. Mp, Ms, Rp,accr, and Rs,accr are the initial masses and accretion radii of the primary (AGB) and secondary (companion) star, ![$\[\dot{M}\]$](/articles/aa/full_html/2024/11/aa50338-24/aa50338-24-eq7.png){kind=small}
is the mass-loss rate of the AGB star, and Tp its effective temperature, a is the semi-major axis of the system, and Rbound is the boundary distance from the AGB star beyond which gas particles are killed. The models run for tmax = 93 yr which corresponds to ten orbital periods. Finally, μ is the mean molecular weight, and γ the adiabatic index of the wind, both set as constant.
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