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Two Windows on Acceleration and Gravitation: Dark Energy or New Gravity?
L. Knox, Y. -S. Song, J. A. Tyson
Small distortions in the observed shapes of distant galaxies, a cosmic shear due to gravitational lensing, can be used to simultaneously determine the distance-redshift relation, r…
The Reionization History at High Redshifts II: Estimating the Optical Depth to Thomson Scattering from CMB Polarization
Gilbert Holder, Zoltan Haiman, Manoj Kaplinghat +1
In light of the recent inference of a high optical depth to Thomson scattering, tau, from the WMAP data we investigate the effects of extended periods of partial ionization and ask…
Comparing Cosmic Microwave Background Datasets
L. Knox, J. R. Bond, A. H. Jaffe +2
To extract reliable cosmic parameters from cosmic microwave background datasets, it is essential to show that the data are not contaminated by residual non-cosmological signals. We…