Cora Uhlemann

School of Mathematics, Statistics and Physics, Newcastle University

Nuw Cosmology beyond the average from one-point statistics

Abstract: Nonlinear gravitational collapse shaped the cosmic web and created a plethora of different density environments – from voids through filaments to galaxy groups. To realise the full potential of galaxy surveys, we need to dissect different density environments that are lumped together in traditional two-point statistics. This is particularly important for detecting extensions of LCDM including massive neutrinos (Nu), dynamical dark energy (w) and modified gravity. I will show how to extract additional information from the mildly nonlinear one-point statistics of matter densities and associated galaxy survey observables. We showed that using the lensing PDF jointly with the 2pt correlation could improve parameter constraints on nuLCDM/wCDM models by 40% when combined with Planck. Recently, we demonstrated the strong discriminating power of the matter PDF for modified gravity finding an up to sixfold increase of the detection significance compared to the power spectrum alone.

یکشنبه 7 آذر 1400، ساعت 19:00

Sunday 28 November 2021 – 19:00 Tehran Time

اتاق سمینار مجازی –Virtual Seminar Room

https://vc.sharif.edu/ch/cosmology

گزینه ورود به صورت مهمان – Enter as a Guest