Metallicity distribution of stars in Fnx. Left panel: [Fe/H] as a function of elliptical radius in degrees. The green dashed line represents the best least-squared fit. They are divided into a metal-rich population ([Fe/H] > -1, blue dots) and a metal-poor population ([Fe/H] < -1, red dots). Right panel: the radial distribution of the metal-rich population (blue histogram) and the metal-poor population (red histogram).