Limits on f_NL parameters from WMAP 3yr data
天体物理学
2009-11-11 v2 高能物理 - 唯象学
高能物理 - 理论
摘要
We analyze the 3-year WMAP data and look for a deviation from Gaussianity in the form of a 3-point function that has either of the two theoretically motivated shapes: local and equilateral. There is no evidence of departure from Gaussianity and the analysis gives the presently tightest bounds on the parameters f_ NL^local and f_NL^equil., which define the amplitude of respectively the local and the equilateral non-Gaussianity: -36 < f_NL^local < 100, -256 < f_NL^equil. < 332 at 95% C.L.
引用
@article{arxiv.astro-ph/0610600,
title = {Limits on f_NL parameters from WMAP 3yr data},
author = {Paolo Creminelli and Leonardo Senatore and Matias Zaldarriaga and Max Tegmark},
journal= {arXiv preprint arXiv:astro-ph/0610600},
year = {2009}
}
备注
10 pages, 3 figures; v2: added some comments and equations, corrected the comments on the constraint on the speed of sound