New answers tagged


My attempts at a short answer failed, so here is my best shot at an explanation. When you look at what the photon-baryon plasma does in the dark matter background, you will bump into an equation that is almost the equation for a harmonic oscillator, but it contains a time dependent quantity $\chi = \frac{3\rho_B}{4\rho_\gamma}$ that spoils the fun. It is, ...

Top 50 recent answers are included