Fig13_12 Hubble diagram

Fig13_12 Hubble diagram

Fig. 13.12 . The distance modulus m = m - M, or the difference between apparent magnitude m and absolute magnitude M, for Type Ia supernovae is plotted against their redshift, z. The omega parameter, W, is the ratio of the inferred density to the critical mass density needed to stop the expansion of the universe in the future. A comparison between the observations and models suggests a mass density of at most Wm = 0.3, significant dark energy with WL = 0.7, and an inflationary universe without spatial curvature with Wm + WL = 1.0. (Courtesy of Adam G. Reiss.]

Copyright 2010, Professor Kenneth R. Lang, Tufts University