Fig13_3 Ripple Data

Fig13_3 Ripple Data

Fig. 13.3 . The angular fluctuation strength, or power, of the cosmic microwave background radiation in which temperature fluctuations, in units of square micro kelvin (10-6 K and designated mK), are displayed as a function of their angular extent in degrees, denoted o. This plot shows the relative brightness for the all-sky map observed from the Wilkinson Microwave Anisotropy Probe, abbreviated WMAP (see Fig. 13.2) at various sizes. The solid line is the model that best fits the observed data (solid dots), and the gray band represents uncertainties in the model. Anisotropy data obtained by previous experiments are denoted by dots with error bars. The observed power spectrum has been compared to other astronomical observations and different theoretical models, providing estimates for the amount of dark matter and dark energy in the universe. (Courtesy of the NASA/WMAP Science Team.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University