Splashback and Shock radius in Omega500 Hydrodynamical Simulation
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Simulations
The cosmological simulations model the universe from cosmological initial conditions after the inflation to the current day. Idealized simulations are well positioned to model the hydrodynamics from smaller scales in high-resolution. Combining the two allows us to understand the physics as well as statistics to interpret large scale observations.
Modeling of Gas and Galaxies
Theoretical models of gas and galaxies are being studied to understand the physics behind gas and galaxies and their connections to dark matter. These models can be used to also paint large scale N-body simulations with physically motivated baryon profiles which can be learned from smaller scale hydrodynamic simulations. This approach reduces the computational cost significantly while preserving the understanding of physics.
Accretion of Cold Gas for Star Formation
Massive galaxies at redshift z>2 are fed by cold gas streams originating from cosmic web filaments. This allows massive galaxies to continually accrete cold gas needed for star formation at cosmic noon. I am using idealized and cosmological simulations of cold streams embedded in hot circumgalactic medium to study how cold gas is transported to the central galaxy in dark matter halos.
Idealized simulation of cold gas stream embedded in hot gas getting disrupted due to Kelvin-Helmholtz Instability (left), collapsing due to self-gravity (middle), or both (right).
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