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 15 of 15 for “"Galactic halo"”.
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Chemodynamics of the Galactic Halo
… science, which is now commonly referred to as Galactic Archaeology. Chapter 1 introduces all the core concepts necessary to understanding the science and results presented in this thesis. This includes a brief introduction to general galaxy formation, an overview of the Milky Way, an …
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The effects of inelastic self-interacting dark matter on galactic halo properties v/
… parameter profiles, and principal axis ratios of galactic halos are examined. We find that inelastic self-interacting dark matter halos differ from both cold dark matter halos and elastic self-interacting dark matter halos in density profiles, in velocity dispersion profiles, in pseudo-phase-space …
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An analysis of the sensitivity of a low pressure time projection chamber to a directional anisotropy due to WIMP interactions
… of these recoils which is consistent with the galactic halo models of dark matter. Such an observation would serve as convincing evidence that these incident particles have an extrasolar origin. In this thesis I discuss the workings of a TPC known as the 4-shooter, the analysis used to identify …
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Quantifying galactic propagation uncertainty in WIMP dark matter search with AMS01 Z=-1 spectrum
… isothermal distribution of dark matter in the Galactic halo. 90% upper bounds of the boost factor by which the flux from the DM annihilation could be enhanced without exceeding AMS01 data are derived to be - 10² - 10⁵, varied as different mSUGRA senarios. The Boron-to-Carbon ratio energy …
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A study of the absorption characteristics of gaseous galaxy halos in the local Universe
… not only of stars but also of gas and dust. The galactic halo, a sphere of gas that surrounds the stellar disk of a galaxy, is especially interesting. It provides a wealth of information about in and outflowing gaseous material towards and away from galaxies and their hierarchical evolution. For …
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Characterization of the Galactic White Dwarf Population in the Next Generation Virgo Cluster Survey
Halo white dwarfs remain one of the least studied stellar populations in the Milky Way because of their faint luminosities. Recent work has uncovered a population of hot white dwarfs which are thought to be remnants of low-mass Population II stars. This thesis uses optical data from the Next …
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Dark matter searches with cosmic-ray detectors and the Square Kilometre Array
… to dark matter annihilating in the dark matter galactic halo, but also on radio signals from the Milky Way and dwarf spheroidal galaxies. Our main purpose is to constrain the dark matter parameter space under the light of the latest experimental data for cosmic-rays and the new sensitivities …
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Schwerebeschleunigungen Kühler Sterne
… when it comes to studying giant stars in the Galactic halo.
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Oscillator strength measurements in singly-ionized, doubly-ionized and neutral lanthanides and transition elements (sm, nd, pr, gd, cu, and fe) using laser-induced breakdown spectroscopy.
… age determinations for stars in the Milky Way's galactic halo, and stellar chemical abundance determinations are dependent upon accurate atomic spectroscopic data to allow the correct interpretation of stellar absorption and emission spectra. It is well known that calculations of many …
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Chemical and kinematical evolution in nearby dwarf spheroidal galaxies
… contradiction to the properties of stars in the Galactic halo. Further, yet unsolved, puzzles include the missing satellite problem, the influence of feedback and reionization, and the nature of dark matter. How then do the dSphs form, to what extent do they contribute to the build-up of massive …
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A Search for WIMP Dark Matter using an Optimized Chi-square Technique on the Final Data from the Cryogenic Dark Matter Search Experiment (CDMS II).
… and cold. The dark matter resides in the halos surrounding galaxies, galaxy clusters and other large-scale structures.</p> <p>Weakly Interacting Massive Particles (WIMPs) are well motivated class of dark matter candidates that arise naturally in supersymmetric extensions to the Standard …