@misc{9246665,
  abstract     = {{This thesis investigates how modifying the initial angular momentum (AM) condition of a Milky Way-like dark matter halo affects the orbital and structural properties of its satellite subhalos. This work uses a suite of five dark-matter-only (DMO) cosmological zoom-in simulations, the VINTERGATAN-GM-AM, in which the initial AM of the Lagrangian patch is modified using the genetIC code to obtain the following set of initial conditions relative to the fiducial simulation; AM_fid × {0.5, 1.05, 1.1, 1.2, 2.0}. The evolution is initialized at z = 99 and ends at z = 0, and we use ROCKSTAR to extract subhalo information for our analysis. 
In order to proceed, we develop a method to identify, match and track three subhalo candidates around our central halo. Using this limited sample size, we provided an analysis of the evolution of four properties in subhalos - the specific orbital AM, the virial radius, the virial mass and the radial distance to the central halo.
In our results, it is found that the specific orbital AM is strongly sensitive to the modification of the main halo’s initial AM and that this sensitivity is persistent throughout the entire redshift range studied(z ∼ 6 to z = 0), with the ordering being set by the initial conditions. Moreover, the structural properties of the subhalos - the virial radius and mass - are shown to be largely insensitive to initial condition variations. Indeed, the virial radius of each run is shown to deviate by less than 10% compared to the reference run AM_fid× {1.1}. At low redshift, more significant deviations are observed and these are attributed to tidal stripping, occurring during orbital inspirals - an analysis of the radial distances show notable differences between simulation runs and the effect of the initial conditions modifications on the trajectory. 
The results of this work show that modifying the initial AM condition leaves a persistent effect on the orbital properties of the subhalos. However, it provides evidence for little direct effect on the virial radius and virial mass evolution. Overall, the results present a physically consistent and coherent picture of the interplay between different dynamical processes in a purely gravitational environment, and are consistent with the predictions of Tidal Torque Theory (TTT) and the existing literature.}},
  author       = {{Chérel, Théo}},
  language     = {{eng}},
  note         = {{Student Paper}},
  title        = {{The Influence of Initial Angular Momentum on the Orbital and Structural Evolution of Satellite Subhalos in a Milky Way-like Dark Matter Halo}},
  year         = {{2026}},
}