Transfer Function

D.Eisenstein, W.Hu

We provide here accurate fitting forms for the matter transfer function of adiabatic models, including high baryon and mixed dark matter variants.

• High baryon models (use if interested in baryon oscillations significant for Ω_b/Ω_m > Ω_mh²+0.2
  
  
  • Codes
    Fortran Version
    C Version
    SM Macro Version
    
    
  • Animated Parameter Variation
    
    
    Baryons in high density universes
    Baryons in low density universes

• CDM Variants accurate for Ω_b/Ω_m<0.3, Ω_ν/Ω_m<0.3
  
  • Includes degenerate mass neutrinos, cosmological constant, and spatial curvature.
  
  
  • Transfer function codes
    
    
    Fortran Version (transfer function & power spectrum statistics combined)
    C Version: (1) transfer function subroutine (2) power spectrum statistics driver
    SM Macro Version (transfer function only)
    
    
  • Animated Parameter Variation
    
    
    Redshift dependence
    Neutrino density dependence
    Neutrino sensitivity vs matter density

Based on:

Baryonic Features in the Transfer Function: (also at astro-ph/9709112)
Power Spectra for Cold Dark Matter and Its Variants: (also at astro-ph/9710252)