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Probing primordial non-Gaussianity with large-scale structure
Physical Review D
We consider primordial non-Gaussianity due to quadratic corrections in the gravitational potential parametrized by a non-linear coupling parameter fnl. We study constraints on fnl from measurements of the galaxy bispectrum in redshift surveys. Using estimates for idealized survey geometries of the 2dF and SDSS surveys and realistic ones from SDSS mock catalogs, we show that it is possible to probe |fnl|~100, after marginalization over bias parameters. We apply our methods to the galaxydoi:10.1103/physrevd.69.103513 fatcat:m2ksfds5zbf5zhuxor3cwvgjyu