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 9 of 9 for “"Milky Way Halo"”.
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Galactic Archaeology with Gaia
The halo of our Galaxy is believed to be mainly formed by the materials accreted/merged in the past, and so has "extragalactic" origin. Such formation process will leave dynamical traces imprinted in the halo, like stellar substructures, distinguishable from the in-situ halo component. Studying the …
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Computational analysis techniques using fast radio bursts to probe astrophysics
… techniques to measure the elusive baryonic halo of the Milky Way. We show that even with a limited data set, FRBs and an appropriate set of statistical tools can provide reasonable constraints on the dispersion measure of the Milky Way halo. Further, we expect that a modest increase in data …
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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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Search for Gamma-ray Spectral Lines with the Fermi Large Area Telescope and Dark Matter Implications
… particle (WIMP). Measurements indicate that the Milky Way Galaxy resides in a halo of dark matter, making it an ideal laboratory for investigating these elusive particles. As WIMPs are predicted to be heavy, their interactions should produce high-energy gamma rays that would be detected by the …
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Investigating the Relationship Between Chemical Abundance Ratios and Ages in Red Giant Stars
… it is necessary to study our own Galaxy, the Milky Way, where we can gather information with the highest amount of detail. However, a crucial parameter in that mission, the measurement of stellar ages for red giant stars, has been a challenge. Red giants are important to study because they …
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Investigating the Relationship Between Chemical Abundance Ratios and Ages in Red Giant Stars
… it is necessary to study our own Galaxy, the Milky Way, where we can gather information with the highest amount of detail. However, a crucial parameter in that mission, the measurement of stellar ages for red giant stars, has been a challenge. Red giants are important to study because they …
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Tracer populations in the local group
… reveals three significant substructures in the Milky Way halo: the Hercules-Aquila Cloud and the Sagittarius Stream, which were already known to exist, and the Pisces Overdensity, which was previously undetected. It is a faint, extended structure found at ~80 kpc and is of unknown origin. …
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A study of the absorption characteristics of gaseous galaxy halos in the local Universe
Today, it is well known that galaxies like the Milky Way consist 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 …
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Unveiling the History and Nature of the Milky Way with Galactic Surveys and Numerical Simulations
The galaxy within which we reside, the Milky Way, offers perhaps the highest fidelity training ground for models of galaxy formation, providing insights into its history of formation and evolution on a star-by-star basis. Such insights are only truly useful for constraining disc galaxy formation …