Green's function of the cosmological thermalization problem - II. Effect of photon injection and constraints

摘要: The energy spectrum of the cosmic microwave background (CMB) provides a powerful tool for constraining standard and non-standard physics in primordial Universe. Previous studies mainly highlight spectral distortions (mu-, y- r-type) created by episodes early release; however, several processes also lead to copious photon production, which requires different treatment. Here, we carry out first detailed study evolution caused injection at energies CMB bands. We provide analytical numerical calculations illustrating rich phenomenology associated distortion signals. show that very high low frequencies creates are similar those from pure release. In mu-era (z>3x10^5), positive or negative chemical potential can be formed, depending on balance between added number. At lower redshifts (z<3x10^5), partial information about process (i.e., time energy) still recovered, with being found partially comptonized state. briefly discuss current future constraints scenarios production. argue more may required assess regimes these distinguished release processes.