A Detection of the Integrated Sachs-Wolfe Effect

Details A Detection of the Integrated Sachs-Wolfe Effect A Detection of the Integrated Sachs-Wolfe Effect

2004-04-23

arxiv.org/abs/astro-ph/0404470v1

New Astron.Rev. 49 (2005) 75-78

Astronomy and Astrophysics

Astrophysics

4 pages, 4 figures, presented at 6th UCLA Dark Matter/Dark Energy Symposium

Scientific paper

10.1016/j.newar.2005.01.005

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).

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