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Title: Constraints on dark energy cosmologies
Author: Abdalla, Filipe B.
ISNI:       0000 0004 2729 386X
Awarding Body: Oxford University
Current Institution: University of Oxford
Date of Award: 2006
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Observations to date have shown that the Universe is probably flat and composed mainly of baryons (",4%), dark matter (",26%) and dark energy ("'70%). Even though these observations provide us with a wealth of information, they fail to explain the nature of more than 90% of our Universe or to include known particles such as neutrinos in the standard model of Cosmology. We attempt here to show how future experiments can, with 'all hemisphere' surveys of the sky, probe further properties of dark energy that might give us an answer as to what its nature is and also show a concrete signal of neutrinos in cosmology. A deep redshift survey would be able to produce an accurate measurement of the power spectrum at different redshifts, thus helping us to probe the evolution of the components of the universe, including dark energy (Abdalla & Rawlings, 2005). A high resolution imaging survey of the sky would allow us to measure the shear power spectrum accurately and provide results orthogonal to existing or future constraints (Rawlings et al., 2004). Both surveys will be available, in the radio part of the spectrum, with the next generation of radio telescopes/interferometers. Even though this next generation of instruments will only be available by the next decade, theoretical predictions on these models are currently required given that these projects are being designed now (Blake et al., 2004). We estimate the possible answers these surveys will provide during the next decade in the case of dark energy (Abdalla et al., 2006) and neutrinos (Abdalla & Rawlings, 2006).
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available