Statistical Analysis of Random Fields in Cosmology

Session

Chair: Kazuyuki Akitsu

6 Mar 2024, 09:30

Tsukuba Campus, KEK, Tsukuba, Japan

22. Consistency relations of the kurtosis in large scale structure and modified gravity

Sora Yamashita

06/03/2024, 09:30

Skewness and kurtosis parameters are the quantities to probe non-Gaussianities of density fluctuations.
By introducing some spatial derivatives, we can define multiple skewness and kurtosis parameters.
We argue that the consistency relations among observables of the skewness and kurtosis parameters can be derived, particularly focusing on the kurtosis parameters in this talk.
The...

26. Emulators for cosmological inference

Takahiro Nishimichi

06/03/2024, 10:10

Cosmological large-scale structure is a nonlinear stochastic process governed mainly by gravity. Its statistical properties depend on the initial conditions and the energy components that constitute the universe. Therefore, extracting information on these fundamental cosmological problems from observational data is an inverse problem. The computational cost of numerical simulations is a...