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CMB-S4 Science Book, First Edition
This book lays out the scientific goals to be addressed by the next-generation ground-based cosmic microwave background experiment, CMB-S4, envisioned to consist of dedicated telescopes at the South
Gravitational leakage into extra dimensions: Probing dark energy using local gravity
The braneworld model of Dvali-Gabadadze-Porrati (DGP) is a theory where gravity is modified at large distances by the arrested leakage of gravitons off our four-dimensional universe. Cosmology in
Modifying gravity with the aether : An alternative to dark matter
There is evidence that Newton and Einstein's theories of gravity cannot explain the dynamics of a universe made up solely of baryons and radiation. To be able to understand the properties of
CMB Anomalies after Planck
Several unexpected features have been observed in the microwave sky at large angular scales, both by WMAP and by Planck. Among those features is a lack of both variance and correlation on the largest
No large-angle correlations on the non-Galactic microwave sky
We investigate the angular two-point correlation function of temperature in the Wilkinson Microwave Anisotropy Probe (WMAP) maps. Updating and extending earlier results, we confirm firm the lack of
Parametrization of dark-energy properties: a principal-component approach.
It is argued that, in the absence of a compelling model for dark energy, the parametrizations of functions about which the authors have no prior knowledge, such as w(z), should be determined by the data rather than by their ingrained beliefs or familiar series expansions.
Multipole vectors - A New representation of the CMB sky and evidence for statistical anisotropy or non-Gaussianity at 2 <= l <= 8
We propose a novel representation of cosmic microwave anisotropy maps, where each multipole order $\mathcal{l}$ is represented by $\mathcal{l}$ unit vectors pointing in directions on the sky and an
Is the low-l microwave background cosmic?
It is shown that the quadrupole plane and the three octopole planes are far more aligned than previously thought (99.9% C.L.) with the direction of the cosmological dipole and with the equinoxes.
Uncorrelated universe: Statistical anisotropy and the vanishing angular correlation function in WMAP years 1 3
The large-angle (low-l) correlations of the cosmic microwave background (CMB) as reported by the Wilkinson Microwave Anisotropy Probe (WMAP) after their first year of observations exhibited
Constraining the topology of the universe.
The first year data from the Wilkinson Microwave Anisotropy Probe are used to place stringent constraints on the topology of the Universe, and the nondetection rules out the possibility that the authors live in a universe with topology scale smaller than 24 Gpc.