Anisotropic dark energy and CMB anomalies (2009)
We investigate the breaking of global statistical isotropy caused by a dark energy component with an energy-momentum tensor which has point symmetry, that could represent a cubic or hexagonal...
Gravity heats the Universe (2009)
Structure in the Universe grew through gravitational instability from very smooth initial conditions. Energy conservation requires that the growing negative potential energy of these structures is...
Matter temperature after cosmological recombination (2009)
The temperature of the atomic matter in the Universe is held to that of the Cosmic Background radiation until decoupling at z~100. After this it cools faster than the radiation (\propto(1+z)^2 rather...
The Universe as an Inside-Out Star (2008)
Crowe, Mitch, Moss, Adam, Scott, Douglas
Acoustic modes can be used to study the physics of the interior of a cavity, and this is especially useful when the inside region is inaccessible. Many astrophysicists use such sound waves as an...
How well do we understand cosmological recombination? (2007)
Wong, Wan Yan, Moss, Adam, Scott, Douglas
The major theoretical limitation for extracting cosmological parameters from the CMB sky lies in the precision with which we can calculate the cosmological recombination process. Uncertainty in the...
Constraints on Brane Inflation and Cosmic Strings (2007)
Battye, Richard A., Garbrecht, Bjorn, Moss, Adam, Stoica, Horace
By considering simple, but representative, models of brane inflation from a single brane-antibrane pair in the slow roll regime, we provide constraints on the parameters of the theory imposed by...
Observing the evolution of the CMB (2007)
Moss, Adam, Zibin, James P., Scott, Douglas
Most cosmological parameters are expected to change significantly only on cosmological time scales, but given the large amount of information contained within the Cosmic Microwave Background (CMB)...
Galaxy redshift surveys selected by neutral hydrogen using FAST (2007)
Duffy, Alan R., Battye, Richard A., Davies, Rod D., Moss, Adam, Wilkinson, Peter N.
We discuss the possibility of performing a substantial spectroscopic galaxy redshift survey selected via the 21cm emission from neutral hydrogen using the Five-hundred metre Aperture Spherical...
Cosmological Perturbations in Elastic Dark Energy Models (2007)
Battye, Richard A., Moss, Adam
We discuss the general framework for a perfect continuum medium in cosmology and show that an interesting generalization of the fluids normally used is for the medium to have rigidity and, hence, be...
Constraints on Supersymmetric Models of Hybrid Inflation (2006)
Battye, Richard A., Garbrecht, Bjorn, Moss, Adam
We point out that the inclusion of a string component contributing around 5% to the CMB power spectrum amplitude on large scales can increase the preferred value of the spectral index n_s of density...
Anisotropic perturbations due to dark energy (2006)
Battye, Richard A., Moss, Adam
A variety of observational tests seem to suggest that the universe is anisotropic. This is incompatible with the standard dogma based on adiabatic, rotationally invariant perturbations. We point out...
Elastic properties of anisotropic domain wall lattices (2005)
Battye, Richard A., Chachoua, Elie, Moss, Adam
Interest in the elastic properties of regular lattices constructed from domain walls has recently been motivated by cosmological applications as solid dark energy. This work investigates the...
Constraints on the solid dark universe model (2005)
Battye, Richard A., Moss, Adam
If the dark energy is modelled as a relativistic elastic solid then the standard CDM and $\Lambda$CDM models, as well as lattice configurations of cosmic strings or domain walls, are points in the...