Spherical Needlets for CMB Data Analysis

Details Spherical Needlets for CMB Data Analysis Spherical Needlets for CMB Data Analysis

2007-07-05

arxiv.org/abs/0707.0844v1

Monthly Notices of the Royal Astronomical Society, Volume 383, Issue 2, pp. 539-545, January 2008

Astronomy and Astrophysics

Astrophysics

7 pages, 7 figures

Scientific paper

10.1111/j.1365-2966.2007.12550.x

We discuss Spherical Needlets and their properties. Needlets are a form of spherical wavelets which do not rely on any kind of tangent plane approximation and enjoy good localization properties in both pixel and harmonic space; moreover needlets coefficients are asymptotically uncorrelated at any fixed angular distance, which makes their use in statistical procedures very promising. In view of these properties, we believe needlets may turn out to be especially useful in the analysis of Cosmic Microwave Background (CMB) data on the incomplete sky, as well as of other cosmological observations. As a final advantage, we stress that the implementation of needlets is computationally very convenient and may rely completely on standard data analysis packages such as HEALPix.

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