A unified framework for theories of modified gravity will be an essential tool for interpreting
the forthcoming deluge of cosmological data. We present such a formalism, the …

We constrain f (R) and chameleon-type modified gravity in the framework of the Berstchinger-
Zukin parametrization using the recently released Planck data, including both the cosmic …

We examine the potential of polarization bispectra of the cosmic microwave background
(CMB) to constrain primordial magnetic fields (PMFs). We compute all possible bispectra …

Abstract Data from the Atacama Cosmology Telescope (ACT) and the South Pole Telescope
(SPT), combined with the nine-year data release from the WMAP satellite, provide very …

When predictions of Einstein's theory of General Relativity are compared against
observations of our Universe, a huge inconsistency is found. The most popular fix for this …

Non-Gaussianities in the cosmic microwave background maps arising from correlations
between lensing and time variations of the gravitational potential (the so-called integrated …

Understanding the apparent accelerating expansion rate of the universe is a challenge for
modern cosmology. One category of explanations is that we are using the wrong …

We forecast the constraints on both the Hu-Sawicki model and the Bertschinger-Zukin model
of f (R) modified gravity within the parametrized post-Friedmann formalism for the Planck …