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Large scale bias in the universe


Research objectives and content
A major goal of Cosmology is to determine the density parameter of the Universe, which determines the Universe's future. The best determinations of this parameter come from large-scale structures, where we see evidence that the Universe might be closed, destined to recollapse.
Inevitably, this information comes from the distribution of luminous matter, and here lies the difficulty: the density parameter is related to the density of mass, and if the galaxies are not unbiased tracers of the mass, conclusions about the density parameter are changed. Indeed, it is true to say that ignorance of the bias parameter compromises all determinations of the density parameter from large-scale structure studies, and comprises one of the major unsolved problems in Cosmology. We have devised a rigorous method for determining the bias from the statistical distribution of galaxies on large scales. Our aim is to develop this method and apply it to galaxy redshift surveys. Once the bias is known, we will be able to determine directly the future evolution of the Universe
Training content (objective, benefit and expected impact)
Mathematical skills (Fourier transforms, perturbation theory), Computer skills (FORTRAN 90), Statistical Analysis of large data sets. Links with industry / industrial relevance (22)

Call for proposal

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Blackford hill, royal observatory
EH9 3HJ Edinburgh
United Kingdom

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EU contribution
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Participants (1)