The relationships between the effective surface temperature T_eff and the internal temperature Tb of nonmagnetized neutron stars with and without accreted envelopes are calculated for T_eff > 5 × 10~4 K. We use updated equations of state and radiativ e opacities, and we improve considerably the electron conductive opacity. We examine various models of accreted layers (H, He, C, and O subshells produced by nuclear burning of accreted matter). The resulting T_eff-Tb relationship is remarkably insensiti ve to the details of the models and depends mainly on the accreted mass △M.
展开▼
