Temperatures in two different regions: quiet Sun (top) and penumbra (bottom). Results at optical depths τ₅ = 1 and τ₅ = 3 are displayed in the left and middle panels, respectively. Right panels show the normalized continuum intensity images. White contours in the bottom right panel (continuum intensity in the penumbra) enclose bright penumbral filaments, whereas white regions in the penumbral temperature maps (left and middle bottom panels) indicate the umbra. All values of the temperature are given in thousands of Kelvin.