CνB Damping of Primordial Gravitational Waves and the Fine-Tuning of the CγB Temperature Anisotropy

Figure 7

Evolution of the normalized wave amplitude as function of for RD (red lines) and RMD (black lines) background cosmic inventories, in correspondence with Figure 1. Again, the RD curves are scale independent and the RMD curves are correctly interpreted by observing that , which correspond to scales that have entered the Hubble horizon before the time of matter-radiation equality.