Pics acoustiques du CMB
Spectre TT schématique du CMB avec pics acoustiques et carte de température de dernière diffusion.
About this tool
Explore how cosmological parameters shift the CMB temperature power spectrum and a stylized last-scattering sky.
The D_ℓ = ℓ(ℓ+1)C_ℓ/2π curve is a schematic (Gaussian acoustic peaks + Silk damping), not a Boltzmann-code output. Raising Ω_b h² boosts odd peaks; raising Ω_m h² moves the sound horizon and shifts ℓ₁.
The sphere is a low-ℓ temperature anisotropy map (not a HEALPix Planck map). Last scattering is at z⋆ ≈ 1090. Press Render to compute.