Little Red Dot: Cosmic Dawn Gas-Reddened Black Hole Simulator

Cosmic Dawn Parameters

Gas Column Density log(N_H/cm^-2) 24.5

Turbulence Velocity σ_v (km/s) 1200

Dust-to-Gas Ratio (D/G) 0.0001

Redshift (z) 7.10

UV Continuum Slope β

-0.42

Mid-IR Excess (24μm)

0.02 mJy

Hα Broad FWHM

3,850 km/s

Gas Scattering Tau

18.4

Radiative Transfer: Photon Trajectories Diffusion in gas shell

● Central BH / Disk (UV Source) ● Escaping Reddened Photons Turbulent Gas Filaments

Emergent SED & Balmer Wings Rest-frame λ (Å)

― Intrinsic Power Law ― Gas-Reddened Emergent ― Dust-Only Extinction