Limits on f_NL parameters from WMAP 3yr data Export

@misc{citeulike:910130, abstract = {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. In models with modified kinetic term for the inflaton, like DBI inflation, where a large equilateral non-Gaussianity is related to a reduced speed of sound c\_s, our analysis gives the lower bound: c\_s \> 0.028 (at 95\% C.L.).}, archivePrefix = {arXiv}, author = {Creminelli, Paolo and Senatore, Leonardo and Zaldarriaga, Matias and Tegmark, Max}, citeulike-article-id = {910130}, citeulike-linkout-0 = {http://arxiv.org/abs/astro-ph/0610600}, citeulike-linkout-1 = {http://arxiv.org/pdf/astro-ph/0610600}, day = {19}, eprint = {astro-ph/0610600}, keywords = {constraints, inflation, nongaussianities}, month = {Oct}, posted-at = {2006-10-23 13:51:18}, priority = {2}, title = {Limits on f\_NL parameters from WMAP 3yr data}, url = {http://arxiv.org/abs/astro-ph/0610600}, year = {2006} }

TY - ELEC ID - citeulike:910130 L3 - citeulike-article-id:910130 N2 - 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. In models with modified kinetic term for the inflaton, like DBI inflation, where a large equilateral non-Gaussianity is related to a reduced speed of sound c_s, our analysis gives the lower bound: c_s > 0.028 (at 95% C.L.). TI - Limits on f_NL parameters from WMAP 3yr data KW - constraints KW - inflation KW - nongaussianities AU - Creminelli, Paolo AU - Senatore, Leonardo AU - Zaldarriaga, Matias AU - Tegmark, Max PY - 2006/Oct/19/ UR - http://arxiv.org/abs/astro-ph/0610600 ER -