AxionNCDMSpecies Class Reference

#include <axion_ncdm_species.h>

Inherits NCDMSpecies.

Protected Member Functions
double	EvaluatePsdAnalytic (double q) const override

Detailed Description

NCDM with a Bose-Einstein phase-space distribution — a thermal axion (or any thermal boson) that decoupled from the SM plasma while relativistic: f0(q) = 1/(2π)³ · 1/(e^q − 1) per internal dof. NOTE: deg = 1 means ONE bosonic dof (a real scalar) — unlike ncdm_standard, where deg = 1 means a full neutrino family (2 fermionic dof). Temperature is given directly (T = T_a/T_cmb) or via the entropy dof at decoupling: T = (43/11 / gstar_dec)^(1/3). See arXiv:1307.0615. All background/perturbation behavior is inherited from NCDMSpecies.

Member Function Documentation

EvaluatePsdAnalytic()

double AxionNCDMSpecies::EvaluatePsdAnalytic ( double  q ) const

overrideprotectedvirtual

Analytic PSD f0(q) for the non-file case. Base: Fermi-Dirac with chemical potential ksi_. GreyBodyNCDMSpecies overrides this.

Reimplemented from NCDMBaseSpecies.

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The documentation for this class was generated from the following files:

• axion_ncdm_species.h
• axion_ncdm_species.cpp