Canny algorithm: A new estimator for primordial non-Gaussianities

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 l up to 1024, we find a 99% distinction between maps with local non-Gaussianity [functionof] sub(NL) [asymptotically =] 450 and Gaussian maps. We present evidence that high-resolution cosmic microwave background studies will strongly enhance the sensitivity of the Canny algorithm to non-Gaussianity, making it a promising technique to estimate primordial non-Gaussianity.