TITLE：Flows For The Masses: The first non-linear perturbative power spectrum for massive neutrinos in cosmology

报告人：Amol Upadhye（Associate Research Professor, South-Western Institute For Astronomy Research,YNU） 

ABSTRACT: The neutrino mass sum is a fundamental particle physics parameter that will be measured cosmologically over the next several years,though a robust determination will require a precise understanding of neutrino clustering.  Recently I developed a non-linear cosmological perturbation theory for massive neutrinos.  It combines three ingredients: multi-fluid perturbation theories discretizing neutrinos'Fermi-Dirac distribution,Time-RG non-linear mode couplings,and Fast Fourier Transform acceleration.  I will describe the resulting neutrino power spectrum,including its dependence upon time and neutrino momentum,and test it against N-body simulations.  Finally,I will discuss ongoing and planned work on observable weak lensing predictions and improvements to N-body neutrino simulations.

报告时间：2024年4月23日（周二）14:00

报告地点：紫台5-516会议室

邀请人：李国亮 研究员（星系宇宙学团组首席）

欢迎大家参加！