Dr Jingjing Shi from KIAA will visit us on Nov 21.She got her PhD from SISSA & USTC in 2017 and works as a postdoc in KIAA since then. She is expertised in large-scale structure, assembly bias, and galaxy size evolution. She is familiar with N-body simulations, analytic galaxy evolution models, and IllustrisTNG. Below are the title and abstract of her talk.
Title:Halo Accretion and the Environment
Abstract:Halo accretion is anisotropic and it’s modulated by the large-scale environment. Using the environmental dependence of halo accretion,
we manage to explain how the halo dynamical properties at z=0 depend on the environment. Furthermore, we study the alignments between halo and large scale structure. We find that only in weak tidal fields does the spin-tidal field alignment follow the prediction of the tidal torque theory. Finally, I will briefly introduce our recent work on the bimodal formation time distribution of infall halos and how this bimodal feature is correlated with the galaxy properties using cosmological hydro-dynamical simulation IllustrisTNG.