Paper: astro-ph/0605122
Date: Thu, 4 May 2006 10:21:04 GMT (396kb)
Title: Detection of the ISW effect and corresponding dark energy constraints
Authors: J. D. McEwen (1), P. Vielva (2), M. P. Hobson (1), E.
Martinez-Gonzalez (2), A. N. Lasenby (1) ((1) University of Cambridge; (2)
Universidad de Cantabria)
Comments: 4 pages, 3 figures, Proceedings of XLIst Rencontres de Moriond
\\
Using a directional spherical wavelet analysis we detect the integrated
Sachs-Wolfe (ISW) effect, indicated by a positive correlation between the
Wilkinson Microwave Anisotropy Probe (WMAP) and NRAO VLA Sky Survey (NVSS)
data, at the 3.9 sigma level. In a flat universe the detection of the ISW
effect provides direct and independent evidence for dark energy. Moreover, we
use our detection to constrain the dark energy density Omega_Lambda. We obtain
estimates for Omega_Lambda consistent with other analysis techniques and data
sets and rule out a zero cosmological constant at greater than 99%
significance.
\\ ( http://arXiv.org/abs/astro-ph/0605122 , 396kb)
Space/Science » in reply to I'm not yanking your chain. Check out these images.
Detection of the ISW effect and corresponding dark energy constraints
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