Biased galaxies and non-linear correlations

Details Biased galaxies and non-linear correlations Biased galaxies and non-linear correlations

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...180l...5s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 180, no. 1-2, June 1987, p. L5-L8.

Statistics

Computation

22

Computational Astrophysics, Cosmology, Galactic Clusters, Galaxies, Stellar Luminosity, Astronomical Models, Mass Distribution, Nonlinearity

Scientific paper

From a model of the non-linear matter distribution that reproduces the probability of holes, the luminosity of rich clusters and their correlations, the author deduces the luminosity function of galaxies and shows it has the Schechter form. He calculates also the galaxy correlations that are seen to be proportional to the matter correlations, but to depend quadratically on luminosity. This implies that the luminous galaxies are more correlated than matter by a factor of ≡4 and provides a model for biased galaxies. This explanation of biasing of the luminous galaxies provides an alternative model that does not rely on any cosmological hypothesis, but simply on non-linear, hierarchical, clustering.

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