Evolution of radius as a function of mass for accreting stars with Ṁ = 10^-5M_⊙/ yr for different initial conditions and different values of ξ. The crosses (with corresponding I to VII labels) correspond to the initial conditions chosen to span a range of specific entropies. The different initial radii are 1.5 R_⊙ (case I), 0.25 R_⊙ (II), 4.0 R_⊙ (III), 2.0 R_⊙ (IV), 2.5 R_⊙ (V), 1.8 R_⊙ (VI), and 1.1 R_⊙ (VII). Solid, dashed, and dotted lines indicate the evolution with ξ = 0,0.1 and 0.5, respectively. The evolution for cases (I) and (II) correspond to those adopted in the present manuscript and are highlighted with thicker lines.