Constraints on galaxy bias, matter density, and primordial non-Gaussianity from the PSCz galaxy redshift survey
View/ Open
Issue Date
2001-02Author
Feldman, Hume A.
Frieman, Joshua A.
Fry, J. N.
Scoccimarro, Román
Publisher
AMERICAN PHYSICAL SOC
Type
Article
Metadata
Show full item recordAbstract
We compute the bispectrum fur the IRAS PSCz catalog and find that the galaxy distribution displays the characteristic signature of gravity. Assuming Gaussian initial conditions, we obtain galaxy biasing parameters 1/b(1) = 1.20(-0.19)(+0.18) and b(2)/b(1)(2) = -0.42 +/- 0.19, with no sign of scale-dependent bias for k less than or equal to 0.3h Mpc(-1). These results impose stringent constraints on non-Gaussian initial conditions. For dimensional scaling models with chi (2)(N) statistics, we find N > 49, which implies a constraint on primordial skewness B-3 < 0.35.
Collections
Citation
Feldman, HA; Frieman, JA; Fry, JN; Scoccimarro, R. Constraints on galaxy bias, matter density, and primordial non-Gaussianity from the PSCz galaxy redshift survey. PHYSICAL REVIEW LETTERS. Feburary 2001. 86(8) : 1434-1437
Items in KU ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
We want to hear from you! Please share your stories about how Open Access to this item benefits YOU.