Improved Method for Detecting Local Discontinuities in CMB data by Finite Differencing
Cosmology and Nongalactic Astrophysics
2015-03-17 v2 High Energy Physics - Phenomenology
Abstract
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.
Keywords
Cite
@article{arxiv.1011.1791,
title = {Improved Method for Detecting Local Discontinuities in CMB data by Finite Differencing},
author = {Jude Bowyer and Andrew H. Jaffe},
journal= {arXiv preprint arXiv:1011.1791},
year = {2015}
}
Comments
5 pages, 6 figures; Text has been edited, in line with the PRD article