Panels a–d: SED for each spectral type and all compositions in the PR-drag pile-up scenario. All spectra are normalized to the flux ratio at 2 μm, and compared to observed fluxes for exozodis around stars of similar type (for the F0 star, for which there is no available observed photometry at 2 μm, the valueis put to 1% of the stellar flux). Data points for Vega are from Absil et al. (2006), η Crv are from Lebreton et al. (2016), 10 Tau are from Kirchschlager et al. (2017), τ Cet are from Di Folco et al. (2007). Additional values are from Absil et al. (2013) and Mennesson et al. (2014). Panel e: SEDs for an A0 star and carbon grains, but only considering the flux within a radial distance indicated in the top right corner, and flux-normalized at λ = 2.12μm such that the disk flux amounts to 1.29% of the stellar flux at that wavelength (FLUOR excess for Vega).