Redshifted temperature as function of mass density inside neutron stars with masses M = 1.0 (dot-long-dash lines), 1.4 (solid lines), 2.0 (short-dashed lines), and M_max = 2.28 M_⊙ (dot-short-dash lines) for the unified EoS model BSk24, and with mass M_max = 2.21 M_⊙ for the APR+NV EoS model (dotted lines) at ages of 10^-3, 1, and 50 yr. The vertical lines separate three density regions: the ocean and outer crust, the inner crust, and the core, displayed using different density scales.