Formation and evolution of kinky vortons (2009)
Battye, Richard A., Pearson, Jonathan A., Pike, Simon, Sutcliffe, Paul M.
We present field theory simulations of a model with Z_2xU(1) symmetry in (2+1)-dimensions. This model has two discrete vacua, allowing for domain walls, and also a conserved Noether charge. For...
Light Nuclei of Even Mass Number in the Skyrme Model (2009)
Battye, Richard A., Manton, Nicholas S., Sutcliffe, Paul M., Wood, Stephen W.
We consider the semiclassical rigid-body quantization of Skyrmion solutions of mass numbers B = 4, 6, 8, 10 and 12. We determine the allowed quantum states for each Skyrmion, and find that they often...
Statistics of the Sunyaev-Zel'dovich Effect power spectrum (2009)
Peel, Michael W., Battye, Richard A., Kay, Scott T.
Using large numbers of simulations of the microwave sky, incorporating the Cosmic Microwave Background (CMB) and the Sunyaev-Zel'dovich (SZ) effect due to clusters, we investigate the statistics of...
Textures and Semi-Local Strings in SUSY Hybrid Inflation (2008)
Battye, Richard A., Garbrecht, Bjorn, Pilaftsis, Apostolos
Global topological defects may account for the large cold spot observed in the Cosmic Microwave Background. We explore possibilities of constructing models of supersymmetric F-term hybrid inflation,...
Genova-Santos, Ricardo, Rubino-Martin, Jose Alberto, Rebolo, Rafael, Battye, Richard A., Blanco, Francisco, Davies, Rod D., ...
We present interferometric imaging at 33 GHz, with the new superextended configuration of the Very Small Array (VSA), of a very deep decrement in the cosmic microwave background (CMB) temperature....
Parallel Computations Allow Cosmologists to Rule Out a Theory of Galaxy Formation (2007)
Andreas Albrecht Richard, Richard A. Battye, James Robinson
Cosmic defect models offer a interesting alternative to the standard "inflationary" models of cosmic stucture formation. Here, we calculate predictions from defect models of structure...
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...
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...
Do consistent $F(R)$ models mimic General Relativity plus $\Lambda$? (2007)
Appleby, Stephen A., Battye, Richard A.
Modified gravity models are subject to a number of consistency requirements which restrict the form that the function $F(R)$ can take. We study a particular class of $F(R)$ functions which satisfy...
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...
Scaife, Anna, Green, David A., Battye, Richard A., Davies, Rod D., Davis, Richard J., Dickinson, Clive, ...
We present results from observations made at 33 GHz with the Very Small Array (VSA) telescope towards potential candidates in the Galactic plane for spinning dust emission. In the cases of the...
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...
Non-Gaussianity in the Very Small Array CMB maps with Smooth-Goodness-of-fit tests (2006)
Rubino-Martin, Jose Alberto, Aliaga, Antonio M., Barreiro, R. B., Battye, Richard A., Carreira, Pedro, Cleary, Kieran, ...
(Abridged) We have used the Rayner & Best (1989) smooth tests of goodness-of-fit to study the Gaussianity of the Very Small Array (VSA) data. Out of the 41 published VSA individual pointings...
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...
Spinning Skyrmions and the Skyrme Parameters (2005)
Battye, Richard A., Krusch, Steffen, Sutcliffe, Paul M.
The traditional approach to fixing the parameters of the Skyrme model requires the energy of a spinning Skyrmion to reproduce the nucleon and delta masses. The standard Skyrme parameters, which are...
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...
Source subtraction for the extended Very Small Array and 33-GHz source count estimates (2004)
Cleary, Kieran A., Taylor, Angela C., Waldram, Elizabeth, Battye, Richard A., Dickinson, Clive, Davies, Rod D., ...
We describe the source subtraction strategy and observations for the extended Very Small Array, a CMB interferometer operating at 33 GHz. A total of 453 sources were monitored at 33 GHz using a...
Linearized self-forces for branes (2004)
Battye, Richard A., Carter, Brandon, Mennim, Andrew
We compute the regularized force density and renormalized action due to fields of external origin coupled to a brane of arbitrary dimension in a spacetime of any dimension. Specifically, we consider...
Optimizing the yield of Sunyaev-Zel'dovich cluster surveys (2004)
Battye, Richard A., Weller, Jochen
We consider the optimum depth of a cluster survey selected using the Sunyaev-Zel'dovich effect. By using simple models for the evolution of the cluster mass function and detailed modeling for a...
Multiple-scales analysis of cosmological perturbations in brane-worlds (2004)
Battye, Richard A., Mennim, Andrew
We present a new approximation method for solving the equations of motion for cosmological tensor perturbations in a Randall-Sundrum brane-world model of the type with one brane in a five-dimensional...
Probing the primordial power spectrum with the VSA (and other CMB experiments) (2004)
Battye, Richard A., Collaboration, The VSA
We present estimates of parameters which model the primordial density fluctuations using CMB data from the VSA, 1st year WMAP, CBI and ACBAR along with external priors from 2dF and the HST. Taken at...
High sensitivity measurements of the CMB power spectrum with the extended Very Small Array (2004)
Dickinson, Clive, Battye, Richard A., Cleary, Kieran, Davies, Rod D., Davis, Richard J., Genova-Santos, Ricardo, ...
We present deep Ka-band ($\nu \approx 33$ GHz) observations of the CMB made with the extended Very Small Array (VSA). This configuration produces a naturally weighted synthesized FWHM beamwidth of...
Cosmological parameter estimation using Very Small Array data out to l=1500 (2004)
Rebolo, Rafael, Battye, Richard A., Carreira, Pedro, Cleary, Kieran, Davies, Rod D., Davis, Richard J., ...
We estimate cosmological parameters using data obtained by the Very Small Array (VSA) in its extended configuration, in conjunction with a variety of other CMB data and external priors. Within the...
Estimating the bispectrum of the Very Small Array data (2004)
Smith, Sarah, Rocha, Graca, Challinor, Anthony, Battye, Richard A., Carreira, Pedro, Cleary, Kieran, ...
We estimate the bispectrum of the Very Small Array data from the compact and extended configuration observations released in December 2002, and compare our results to those obtained from Gaussian...
Neutral hydrogen surveys for high redshift galaxy clusters and proto-clusters (2004)
Battye, Richard A., Davies, Rod D., Weller, Jochen
We discuss the possibility of performing blind surveys to detect large-scale features of the universe using 21cm emission. Using instruments with approx. 5'-10' resolution currently in the planning...
Cosmological parameter estimation using Very Small Array data out to l? = 1500 (2004)
Rebolo, Rafael, Battye, Richard A., Carreira, Pedro, Cleary, Kieran, Davies, Rod D., Davis, Richard J., ...
Searching for non-Gaussianity in the VSA data (2003)
Savage, Richard, Battye, Richard A., Carreira, Pedro, Cleary, Kieran, Davies, Rod D., Davis, Richard J., ...
We have tested Very Small Array (VSA) observations of three regions of sky for the presence of non-Gaussianity, using high-order cumulants, Minkowski functionals, a wavelet-based test and a Bayesian...
Constraining cosmological parameters using Sunyaev-Zel'dovich cluster surveys (2003)
Battye, Richard A., Weller, Jochen
We discuss how future cluster surveys can constrain cosmological parameters with particular reference to the properties of the dark energy component responsible for the observed acceleration of the...
Sunyaev-Zel'dovich cluster surveys using a large beam (2003)
Battye, Richard A., Weller, Jochen
Sunyaev Zel'dovich cluster surveys can be used to constrain cosmological parameters. Extracting clusters from the primary anisotropies and the unresolved background from very faint clusters is simple...
Gradient formula for linearly self-interacting branes (2002)
Carter, Brandon, Battye, Richard A., Uzan, Jean-Philippe
The computation of long range linear self-interaction forces in string and higher dimensional brane models requires the evaluation of the gradients of regularised values of divergent self-interaction...
Stable Skyrmions in two-component Bose-Einstein condensates (2001)
Battye, Richard A., Cooper, N. R., Sutcliffe, Paul M.
We show that stable Skyrmions exist in two-component atomic Bose-Einstein condensates, in the regime of phase separation. Using full three-dimensional simulations we find the stable Skyrmions with...
Simulated gravity without true gravity in asymmetric brane-world scenarios (2001)
Carter, Brandon, Uzan, Jean-Philippe, Battye, Richard A., Mennim, Andrew
This article investigates asymmetric brane-world scenarios in the limit when the bulk gravity is negligible. We show that, even when true self gravity is negligible, local mass concentrations will be...
Einstein equations for an asymmetric brane-world (2001)
Battye, Richard A., Carter, Brandon, Mennim, Andrew, Uzan, Jean-Philippe
We consider a brane-world of co-dimension one without the reflection symmetry that is commonly imposed between the two sides of the brane. Using the coordinate-free formalism of the Gauss-Codacci...
Domain Wall Dominated Universes (1999)
Battye, Richard A., Bucher, Martin, Spergel, David
We consider a cosmogony with a dark matter component consisting of a network of frustrated domain walls. Such a network provides a solid dark matter component with $p=-(2/3)\rho $ that remains...
Battye, Richard A., Magueijo, Joao, Weller, Jochen
Quantum fluctuations created during inflation can account for the observed matter distribution in the linear regime if the universe has two components of dark matter, one which is cold and...
Reionization by active sources and its effects on the cosmic microwave background (1998)
Weller, Jochen, Battye, Richard A., Albrecht, Andreas
We investigate the possible effects of reionization by active sources on the cosmic microwave background. We concentrate on the sources themselves as the origin of reionization, rather than early...
Battye, Richard A., Sutcliffe, Paul M.
It has been suggested recently that knots might exist as stable soliton solutions in a simple three-dimensional classical field theory, opening up a wide range of possible applications in physics and...
The case against scaling defect models of cosmic structure formation (1997)
Albrecht, Andreas, Battye, Richard A., Robinson, James
We calculate predictions from defect models of structure formation for both the matter and Cosmic Microwave Background (CMB) over all observable scales. Our results point to a serious problem...