Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Stellar halo"”.
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Stellar Halos: modelling formation in the L-Galaxies 2020 semi-analytic model
… 2020 semi-analytic model simulates the stellar halos of galaxies and the intracluster stellar (ICS) components of galaxy clusters. Two galaxy disruption models were tested, namely instantaneous disruption and gradual disruption. Furthermore, two stellar halo profiles were applied to the …
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The stellar halos of Milky Way type galaxies in the EAGLE simulations
The stellar halo component of a galaxy contains a wealth of valuable information on the host galaxy's formation history. As the diffuse outskirts of galaxies which have been built up through hierarchical assembly, their content and structure is directly tied to the material that was accreted onto …
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Galactic Stellar Haloes in the CDM Model
This thesis studies galactic stellar haloes built up through the tidal disruption of accreted dwarf galaxies. Numerical simulations are used to explore this process in the context of the Cold Dark Matter model of cosmological structure formation. We predict the properties of stellar structures that …
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Hobby-Eberly Telescope Chemical Abundances of Stars in the Halo (CASH) project : spectroscopic analyses of the first ~80 stars
… Telescope Chemical Abundances of Stars in the Halo (CASH) project aims to characterize the nature of the early universe through the study of metal-poor stars in the stellar halo of the galaxy. Once completed, this will be the largest set of abundances determined for metal-poor stars from high …
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Galactic dynamics : multiple tracers and gravitational lensing
… to infer the prope1ties of Dark Matter (DM) haloes and investigate scenarios of galaxy formation. It begins with a study of the virial properties (flattening and global anisotropy) of stellar populations in different DM profiles. General theorems are presented, with some application to the …
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Cosmological Simulations of Galactic Disc Assembly
… $z=0$ and find that four of the simulations, the stellar disc appears to undergo continual/secular heating. Two other simulations suggest a “saturation” in the heating profile for young stars in the disc. None of the simulations have thin discs as old as that of the Milky Way. We also analyse the …
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Chemodynamics of the Galactic Halo
… providing data for well over a billion stellar objects, the study of our home galaxy has evolved into a data-driven science. The Galaxy now acts as an environment in which we can employ novel data-driven techniques, while still maintaining a deep link with the classical mathematical …
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The Effect of the Large Magellanic Cloud on the Dark Matter Halo of the Milky Way
… measurements of tracers (satel- lites, streams, halo stars) of the dark matter (DM) distribution and assembly history of the MW. Using results from 8 high-resolution N-body simulations, I will describe the main perturbations caused by the LMC: the DM wake, the barycenter displace- ment, and the …
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Formation and dynamics of the Galactic disc and halo
… interpreted dynamically. The disc, the bar, the halo and the satellites are all components of the Galaxy's dynamical system which are able to interact to create, perturb and destroy substructure. By using tailored and cosmological simulations, this substructure can be modelled and interpreted to …
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Models of the Galaxy and the massive spectroscopic stellar survey RAVE
… in computational power as well as in massive stellar surveys we are now able to compare resolved stellar populations in simulations and in observations. In this thesis we use a number of approaches to relate the results of the two fields to each other. The major observational data set we refer …