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Full-Text Articles in Physical Processes
Response Of Galactic Disks To Dark Matter Halo Triaxiality, Alex J. Hutton
Response Of Galactic Disks To Dark Matter Halo Triaxiality, Alex J. Hutton
College of Graduate Studies: Theses & Dissertations
In this study we examine the influence of dark matter halo triaxiality on the evolution of galactic disks. We do this by running a series of collisionless N-body models. In a first set of models we place the galactic disk within an oblate halo at various orientations and examine the resulting evolution. In our second set we construct fully self-consistent models of a stellar disk embedded within a spherical halo, with an impacting external dark matter dwarf galaxy. After evolving the simulations for a Hubble time, we examine the disk orientation and warping along with other quantities such as bar …
Evolution Of Angular Momentum In Triaxial Dark Matter Halos, Tara C. Nester
Evolution Of Angular Momentum In Triaxial Dark Matter Halos, Tara C. Nester
Honors College Theses
Galactic halos are believed to form through both the early inflow of dark matter from the cosmic web and mergers over an extended period. At the same time, stellar disks are forming within this evolving halo. How a stellar disk responds to a changing halo is investigated in this study using live n-body disks embedded in an analytic triaxial potential. At triaxialities of a few percent, we find that while there are subtle perturbations in the disk, there is no significant change in the total disk angular momentum. However, between 5 and 10% triaxialities there is a sharp transition to …