Séminaire Univers / |
| « Large-scale clustering with counts-in-cells statistics » |
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Cora Uhlemann |
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In this talk, I will describe how to follow the gravitational evolution of the large scale structure of matter in the Universe using counts-in-cells statistics. Based on the theory of large deviations, I will argue that spherical collapse dynamics can be used to predict the statistics of counts in spherical cells. I will then compare analytical predictions for counts-in-cells statistics against state of the art dark matter simulations showing that they can access a mildly nonlinear regime beyond what is commonly achievable with perturbative calculations. Finally, I will discuss the impact of the initial conditions and cosmological parameters on counts-in-cells statistics and comment on its future potential to constrain cosmology using future galaxy surveys by describing biased tracers and applying the formalism to angular clustering and weak lensing.
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mardi 28 février 2017 - 11:15 Salle 281 Institut d'Astrophysique de Paris |
| Pages web du séminaire / Seminar's webpage |