Rethinking mass transfer: A unified semianalytical framework for circular and eccentric binaries - I. Orbital evolution due to conservative mass transfer

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Fig. 4.

Secular change rate of the semimajor axis as a function of the mass ratio q and the level of synchronism f_don of the donor in the limit of circular orbits. From top to bottom, GeMT model in the limit of point masses, extended bodies for $r_{acc} = - r_{acc} \hat{r}$ $\boldsymbol{r}_{\mathrm{acc}} = - r_{\mathrm{acc}} \hat{\boldsymbol{r}}$ , the δ-function, and emt models. The values of the relevant parameters are provided in Table 1.

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