2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/2152We investigate the effect of orbital decay caused by nuclear expansion of a (sub)giant star in synchronous binary system. We compare this effect with the presence of a magnetic stellar wind and show that the additional transfer of orbital angular momentum into spin angular momentum is relatively important -- especially since it has been shown that the effect of magnetic braking saturates at short orbital periods.9 pages, 4 figures, to appear in: Evolution of Binary and Multiple Star Systems, ASP Conf. Series, Vol. ?, 2001, P. Podsiadlowski et al. (eds.)Astrophysicstext