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astro-ph1998
Topological Defects with Broken Scale Invariance
Ue-Li Pen
Defect models have recently been declared dead (Watson 1997), because they predict microwave background and matter fluctuations grossly out of line with what we see. In this talk w…
astro-ph1998
Ω_0 from the Apparent Evolution of Gas Fractions in Rich Clusters of Galaxies
Rebecca Danos, Ue-Li Pen
We apply a unique gas fraction estimator to published X-ray cluster properties and we compare the derived gas fractions of observed clusters to simulated ones. The observations are…