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Measuring the Universe with Galaxy Clustering and Motions

I will review some recent advances in studies of large-scale structure, focusing on the latest clustering results from our VIPERS project at the ESO VLT, together with parallel development of analysis and modeling techniques. With 90,000 galaxy redshifts and multi-band photometric information, VIPERS has delivered at redshift 0.5 < z < 1.2 both cosmological measurements (as e.g. various estimates of the growth rate of structure through Redshift Space Distortions) and new insights on the evolution of galaxies within their large-scale environment at these epochs. Having the latter aspects under control allows us to investigate how well specific galaxies trace the underlying mass distribution and to reduce systematic errors in the modeling, e.g. when using RSD to test gravity. I will then conclude discussing a recent complementary result, in which forward modeling of redshift-space clustering through numerical simulations, pushing well into the non-linear regime, provides a sensitive and seemingly robust probe of General Relativity.

Speaker: Gigi Guzzo, Milan

Tuesday, 10/16/18


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Campbell Hall, Rm 131

UC Berkeley
Berkeley, CA 94720