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The WiggleZ Dark Energy Survey: constraining the evolution of Newton's constant using the growth rate of structure
Savvas Nesseris, Chris Blake, Tamara Davis +1
We constrain the evolution of Newton's constant using the growth rate of large-scale structure measured by the WiggleZ Dark Energy Survey in the redshift range . We…
Genetic algorithms and the analysis of SnIa data
Savvas Nesseris
The Genetic Algorithm is a heuristic that can be used to produce model independent solutions to an optimization problem, thus making it ideal for use in cosmology and more specific…
Observational constraints on Galileon cosmology
Savvas Nesseris, Antonio De Felice, Shinji Tsujikawa
We study the cosmology of a covariant Galileon field with five covariant Lagrangians and confront this theory with the most recent cosmological probes: the type Ia supernovae data…
Newton's constant in f(R,R_{μν}R^{μν},\Box R) theories of gravity and constraints from BBN
Savvas Nesseris, Anupam Mazumdar
We consider corrections to the Einstein-Hilbert action which contain both higher order and nonlocal terms. We derive an effective Newtonian gravitational constant applicable at the…