Search for dissertations about: "Cosmology"
Showing result 16 - 20 of 519 swedish dissertations containing the word Cosmology.
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16. Modelling and Detecting Kilonovae in the Rubin Observatory Era
Abstract : Survey astronomy is a powerful tool for discoveries in astrophysics and cosmology. In the coming years, this field will be revolutionised with the start of the ten-year Legacy Survey of Space and Time (LSST), to be conducted at the Vera C. Rubin Observatory. READ MORE
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17. Cosmological aspects of universal extra dimensions
Abstract : It is an intriguing possibility that our world may consist of more than three spatial dimensions, compactified on such a small scale that they so far have escaped detection. In this thesis, a particular realization of this idea -- the scenario of so-called 'universal extra dimensions' (UED) -- is studied in some detail, with a focus on cosmological consequences and appplications. READ MORE
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18. Was Einstein Wrong? : Theoretical and observational constraints on massive gravity
Abstract : For more than a century, Einstein's theory of general relativity has described gravitational phenomena with astonishing precision. However, for the theory to fit observations we need to add two elusive substances: dark energy and dark matter. Together they add up to 95% of the energy budget of the Universe. READ MORE
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19. Sources of Dust Extinction in Type Ia Supernovae : Measurements and constraints from X-rays to the Infrared
Abstract : The use of Type Ia supernovae (SNe Ia) as distance indicators is essential for studying the expansion history of the Universe and for exploring the nature of dark energy. However, a lack of understanding of the progenitor systems and the empirically derived colour-brightness corrections represent severe limitations for SNe Ia as cosmological probes. READ MORE
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20. Heating the Early Universe : Numerical Methods and Their Analysis
Abstract : During the epoch when the first collapsed structures formed (6.... READ MORE