Currently one of the most exciting problems in cosmology is the nature of dark energy,which is responsible for the late time accelerated expansion of the universe. Darkenergy modifies the distance-redshift relation, and governs the late time evolution ofgravitational potentials in the universe. Therefore by observing large scale structurewe can gain valuable information on the nature of dark energy. In this thesis we examinea particular theory of dark energy, known as elastic dark energy. Using weaklensing and the ISW effect, coupled with CMB and SNIa data, we find lower boundsfor the sound speed of elastic dark energy. We also explore how this model behaves inthe presence of collapsing matter.
Date of Award | 31 Dec 2011 |
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Original language | English |
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Awarding Institution | - The University of Manchester
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Supervisor | Richard Battye (Supervisor) |
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- Elastic Dark Energy
- Cosmology
Dark Energy And Large Scale Structure
Pediani, S. (Author). 31 Dec 2011
Student thesis: Phd