A modification of the action of general relativity leaves an imprint on the cosmic microwave
background (CMB) anisotropies due to a different pattern for the growth of the cosmic …

In order to explain cosmic acceleration without invoking “dark” physics, we consider f (R)
modified gravity models, which replace the standard Einstein-Hilbert action in General …

This thesis work focuses on the use of deep, wide field surveys to extract new cosmological
information. Precise photometry plays a large role in this quest, through the determination of …