A Detection of the Integrated Sachs-Wolfe Effect
Astrophysics
2009-11-10 v1
Abstract
We have detected statistically significant correlations between the cosmic microwave background and two tracers of large-scale structure, the HEAO1 A2 full sky hard X-ray map and the NVSS 1.4 GHz, nearly full sky radio galaxy survey. The level of correlations in these maps is consistent with that predicted for the integrated Sachs-Wolfe (ISW) effect in the context of a Lambda CDM cosmological model and, therefore, provides independent evidence for a cosmological constant. A maximum likelihood fit to the amplitude of the ISW effect relative to the predicted value is 1.13 +- 0.35 (statistical error only).
Cite
@article{arxiv.astro-ph/0404470,
title = {A Detection of the Integrated Sachs-Wolfe Effect},
author = {S. P. Boughn and R. G. Crittenden},
journal= {arXiv preprint arXiv:astro-ph/0404470},
year = {2009}
}
Comments
4 pages, 4 figures, presented at 6th UCLA Dark Matter/Dark Energy Symposium