Panel A: Spectral energy distribution of HD 100453 compiled from various facilities. Panels B and C: Fitted blackbody curves corresponding to the central star (B) and inner disk (C), respectively, using the stellar parameters from Guzmán-Díaz et al. 2021. The flux from the best-fit temperature gradient model is also included (see Table 4). Panel D: Contribution from the extended ‘halo’ component. The blue highlighted area corresponds to the wavelength range probed in this research.