Physical Evidence for Dark Energy
Abstract
We present measurements of the angular cross-correlation between luminous red galaxies from the Sloan Digital Sky Survey and the cosmic microwave background temperature maps from the Wilkinson Microwave Anisotropy Probe. We find a statistically significant achromatic positive correlation between these two data sets, which is consistent with the expected signal from the late Integrated Sachs-Wolfe (ISW) effect. We do not detect any anti-correlation on small angular scales as would be produced from a large Sunyaev-Zel'dovich (SZ) effect, although we do see evidence for some SZ effect for our highest redshift samples. Assuming a flat universe, our preliminary detection of the ISW effect provides independent physical evidence for the existence of dark energy.
Cite
@article{arxiv.astro-ph/0307335,
title = {Physical Evidence for Dark Energy},
author = {R. Scranton and A. J. Connolly and R. C. Nichol and A. Stebbins and I. Szapudi and D. J. Eisenstein and N. Afshordi and T. Budavari and I. Csabai and J. A. Frieman and J. E. Gunn and D. Johnston and Y. Loh and R. H. Lupton and C. J. Miller and E. S. Sheldon and R. S. Sheth and A. S. Szalay and M. Tegmark and Y. Xu},
journal= {arXiv preprint arXiv:astro-ph/0307335},
year = {2013}
}
Comments
Submitted to Phys. Rev. Letters (6 pages)