Essays about: "f R gravity"
Found 3 essays containing the words f R gravity.
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1. The Largest Void and Cluster in Non-Standard Cosmology
University essay from Uppsala universitet/Teoretisk astrofysikAbstract : We employ observational data about the largest cosmic void and most massive galaxy cluster known to date, the 'Cold Spot' void and the 'El Gordo' cluster, in order to constrain the parameter |fR0| from the f(R) gravity formulation by Hu and Sawicki and the matter power spectrum normalization at present time, σ8. We obtain the marginalized posterior distribution for these two parameters through a Markov Chain Monte Carlo analysis, where the likelihood function is modeled through extreme value statistics. READ MORE
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2. Galaxy clusters and cosmic voids in modified gravity scenarios
University essay from Uppsala universitet/Teoretisk astrofysikAbstract : The so-called 'cosmic web', comprising cosmic voids and galaxy clusters, has been proven to be extremely sensitive to deviations from General Relativity. This could be further investigated by future large-scale surveys, such as with the European Space Agency satellite Euclid. READ MORE
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3. Potassium in the Galactic thin and thick discs
University essay from Lunds universitet/Astronomi - Genomgår omorganisationAbstract : To understand the evolution of our galaxy, the chemical abundance patterns and trends within the stars of the different regions are explored. The process of synthesizing these elements reveals key details about the way the stars and, therefore, the galaxy formed. READ MORE
