Canny Algorithm: A New Estimator for Primordial Non-Gaussianities
Cosmology and Nongalactic Astrophysics
2013-05-30 v3 High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
We utilize the Canny edge detection algorithm as an estimator for primordial non-Gaussianities. In preliminary tests on simulated sky patches with a window size of 57 degrees and multipole moments up to 1024, we find a distinction between maps with local non-Gaussianity (or ) and Gaussian maps. We present evidence that high resolution CMB studies will strongly enhance the sensitivity of the Canny algorithm to non-Gaussianity, making it a promising technique to estimate primordial non-Gaussianity.
Keywords
Cite
@article{arxiv.1108.2265,
title = {Canny Algorithm: A New Estimator for Primordial Non-Gaussianities},
author = {Rebecca J. Danos and Andrew R. Frey and Yi Wang},
journal= {arXiv preprint arXiv:1108.2265},
year = {2013}
}
Comments
4 pages, 4 figures; v2. 5pp, as submitted to PRD; v3. 5pp, minor clarifications and added discussion of negative fNL values