Evolution of a CBS with Z = 0.001, initial masses M₂ = 1.30 M_⊙ and M_ns = 1.40 M_⊙, P_orb = 0.35 d, β = 0.50, and α_irrad = 0.10. All quantities are shown as a function of P_orb. Left upper panel shows the radius of the star and corresponding Roche lobe (dotted and solid lines, respectively); right upper panel depicts the effective temperature; left lower panel indicates the donor mass and the right lower panel shows the age and mass ratio (solid and dotted lines, respectively). The orbital period of PSR J1824-2452H system, P_orb = 0.435 d, is shown with a vertical dashed line. The preferred M₂ ≈ 0.2 M_⊙, R₂ ≈ 0.65 R_⊙, log ₁₀(T_eff/ K) ≈ 3.78, and Q ≈ 7 given by Pallanca et al. (2010) are consistent with these results.