Key points are not available for this paper at this time.
We compute the bispectrum for 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/b₁{0ex{0ex}=0ex{0ex}1. 20}-₀. ₁₉^+0. 18 and b₂/b₁^20ex{0ex}=0ex{0ex}-0. 420. 19, with no sign of scale-dependent bias for k0. 3hMpc^-1. These results impose stringent constraints on non-Gaussian initial conditions. For dimensional scaling models with ₍^2 statistics, we find N>49, which implies a constraint on primordial skewness B₃<0. 35.
Feldman et al. (Mon,) studied this question.