Improved Method for Detecting Local Discontinuities in CMB data by Finite Differencing

Details Improved Method for Detecting Local Discontinuities in CMB data by Finite Differencing Improved Method for Detecting Local Discontinuities in CMB data by Finite Differencing

2010-11-08

arxiv.org/abs/1011.1791v2

Phys.Rev.D83:023503,2011

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

5 pages, 6 figures; Text has been edited, in line with the PRD article

Scientific paper

10.1103/PhysRevD.83.023503

An unexpected distribution of temperatures in the CMB could be a sign of new physics. In particular, the existence of cosmic defects could be indicated by temperature discontinuities via the Kaiser-Stebbins effect. In this paper, we show how performing finite differences on a CMB map, with the noise regularized in harmonic space, may expose such discontinuities, and we report the results of this process on the 7-year Wilkinson Microwave Anisotropy Probe data.

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