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 5 of 5 for “"galaxy structure"”.
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Constraints on early-type galaxy structure from spectroscopically selected gravitational lenses
… of a unique spectroscopic survey for strong galaxy-galaxy gravitational lenses: motivation, candidate selection, ground-based spectroscopic follow-up, Hubble Space Telescope imaging, data analysis, and results on the radial density profile of the lens galaxies. The lens candidates are …
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The Disk Structure of Late Type Galaxies: Determining the Black Hole Mass Function of Low Surface Brightness Galaxies Through Logarithmic Spiral Arm Pitch Angle Measurement
<p>This dissertation pertains to the geometric structure of late type (spiral) galaxies, specifically on the relation between the logarithmic spiral pitch angle of the galactic spiral arms with other properties of the galaxy, such as central Supermassive Black Hole (SMBH) mass. Our work continues a …
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Weighing the Milky Way While Exploring Dynamical Disequilibrium
Modern cosmology suggests that galaxies and galaxy clusters formed in gravitational potential wells defined by dark matter overdensities in the structural formation stage of the universe. Therefore, the decomposition of matter into baryonic and dark contributions is a fundamental problem for …
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Multi-messenger constraints and pressure from dark matter annihilation into electron-positron pairs
… emission from the central regions of the Galaxy. According to our results, the annihilation cross-section should not be higher than the canonical value for a thermal relic if the mass of the dark matter candidate is smaller than a few GeV. In addition, we also derive a stringent upper …
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Understanding massive disk galaxy formation through resolved stellar populations
… populations to improve our understanding of galaxy formation and evolution. In the first part we improve a method for metallicity determination of faint old stellar systems, in the second and third part we analyze the individual history of six nearby disk galaxies outside the Local Group. A …