Biasing and Hierarchical Statistics in Large-scale Structure

Details Biasing and Hierarchical Statistics in Large-scale Structure Biasing and Hierarchical Statistics in Large-scale Structure

1993-02-15

arxiv.org/abs/astro-ph/9302009v2

Astrophys.J. 413 (1993) 447-452

Astronomy and Astrophysics

Astrophysics

11 pages, LaTeX, FERMILAB-Pub-92/367-A

Scientific paper

10.1086/173015

In the current paradigm there is a non-trivial bias expected in the process of galaxy formation. Thus, the observed statistical properties of the galaxy distribution do not necessarily extend to the underlying matter distribution. Gravitational evolution of initially Gaussian seed fluctuations predicts that the connected moments of the matter fluctuations exhibit a hierarchical structure, at least in the limit of small dispersion. This same hierarchical structure has been found in the galaxy distribution, but it is not clear to what extent it reflects properties of the matter distribution or properties of a galaxy formation bias. In this paper we consider the consequences of an arbitrary, effectively local biasing transformation of a hierarchical underlying matter distribution. We show that a general form of such a transformation preserves the hierarchical properties and the shape of the dispersion in the limit of small fluctuations, i.e. on large scales, although the values of the

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