Constraining the dark fluid (2009)
Kunz, Martin, Liddle, Andrew R, Parkinson, David, Gao, Changjun
Cosmological observations are normally fit under the assumption that the dark sector can be decomposed into dark matter and dark energy components. However, as long as the probes remain purely...
A New Approach to Multi-wavelength Associations of Astronomical Sources (2009)
Roseboom, Isaac G., Oliver, Seb, Parkinson, David, Vaccari, Mattia
One of the biggest problems faced by current and next-generation astronomical surveys is trying to produce large numbers of accurate cross identifications across a range of wavelength regimes with...
Parkinson, David, Kunz, Martin, Liddle, Andrew R., Bassett, Bruce A., Nichol, Robert C., Vardanyan, Mihran
We extend our study of the optimization of large baryon acoustic oscillation (BAO) surveys to return the best constraints on the dark energy, building on Paper I of this series (Parkinson et al....
Planck priors for dark energy surveys (2008)
Mukherjee, Pia, Kunz, Martin, Parkinson, David, Wang, Yun
Although cosmic microwave background (CMB) anisotropy data alone cannot constrain simultaneously the spatial curvature and the equation of state of dark energy, CMB data provide a valuable addition...
WMAP normalization of inflationary cosmologies (2007)
Liddle, Andrew R., Parkinson, David, Leach, Samuel M., Mukherjee, Pia
We use the three-year WMAP observations to determine the normalization of the matter power spectrum in inflationary cosmologies. In this context, the quantity of interest is not the normalization...
Yamamoto, Kazuhiro, Parkinson, David, Hamana, Takashi, Nichol, Robert C., Suto, Yasushi
We consider the extent to which future imaging surveys of galaxies can distinguish between dark energy and modified gravity models for the origin of the cosmic acceleration. Dynamical dark energy...
Liddle, Andrew R, Corasaniti, Pier Stefano, Kunz, Martin, Mukherjee, Pia, Parkinson, David, Trotta, Roberto
In astro-ph/0702542v2, Linder and Miquel seek to criticize the use of Bayesian model selection for data analysis and for survey forecasting and design. Their discussion is based on three serious...
Optimising Baryon Acoustic Oscillation Surveys - I: Testing the concordance LCDM cosmology (2007)
Parkinson, David, Blake, Chris, Kunz, Martin, Bassett, Bruce A., Nichol, Robert C., Glazebrook, Karl
We optimize the design of future spectroscopic redshift surveys for constraining the dark energy via precision measurements of the baryon acoustic oscillations (BAO), with particular emphasis on the...
When can the Planck satellite measure spectral index running? (2007)
Pahud, Cédric, Liddle, Andrew R., Mukherjee, Pia, Parkinson, David
We use model selection forecasting to assess the ability of the Planck satellite to make a positive detection of spectral index running. We simulate Planck data for a range of assumed cosmological...
Optimizing baryon acoustic oscillation surveys I: testing the concordance (2007)
Parkinson, David, Blake, Chris, Kunz, Martin, Bassett, Bruce A., Nichol, Robert C., Glazebrook, Karl
We optimize the design of future spectroscopic redshift surveys for constraining the dark energy via precision measurements of the baryon acoustic oscillations (BAOs), with particular emphasis on the...
Parkinson, David, Blake, Chris, Kunz, Martin, Bassett, Bruce A., Nichol, Robert C., Glazebrook, Karl
We optimize the design of future spectroscopic redshift surveys for constraining the dark energy via precision measurements of the baryon acoustic oscillations (BAOs), with particular emphasis on the...
Parkinson, David, Blake, Chris, Kunz, Martin, Bassett, Bruce A., Nichol, Robert C., Glazebrook, Karl
We optimize the design of future spectroscopic redshift surveys for constraining the dark energy via precision measurements of the baryon acoustic oscillations (BAOs), with particular emphasis on the...
Parkinson, David, Blake, Chris, Kunz, Martin, Bassett, Bruce A., Nichol, Robert C., Glazebrook, Karl
We optimize the design of future spectroscopic redshift surveys for constraining the dark energy via precision measurements of the baryon acoustic oscillations (BAOs), with particular emphasis on the...
Parkinson, David, Blake, Chris, Kunz, Martin, Bassett, Bruce A., Nichol, Robert C., Glazebrook, Karl
We optimize the design of future spectroscopic redshift surveys for constraining the dark energy via precision measurements of the baryon acoustic oscillations (BAOs), with particular emphasis on the...
Parkinson, David, Blake, Chris, Kunz, Martin, Bassett, Bruce A., Nichol, Robert C., Glazebrook, Karl
We optimize the design of future spectroscopic redshift surveys for constraining the dark energy via precision measurements of the baryon acoustic oscillations (BAOs), with particular emphasis on the...
Quintessence reconstructed: new constraints and tracker viability (2006)
Sahlén, Martin, Liddle, Andrew R, Parkinson, David
We update and extend our previous work reconstructing the potential of a quintessence field from current observational data. We extend the cosmological dataset to include new supernova data, plus...
Present and future evidence for evolving dark energy (2006)
Liddle, Andrew R, Mukherjee, Pia, Parkinson, David, Wang, Yun
We compute the Bayesian evidences for one- and two-parameter models of evolving dark energy, and compare them to the evidence for a cosmological constant, using current data from Type Ia supernova,...
Cosmological model selection (2006)
Liddle, Andrew R., Mukherjee, Pia, Parkinson, David
Model selection aims to determine which theoretical models are most plausible given some data, without necessarily asking about the preferred values of the model parameters. A common model selection...
The WMAP normalization of inflationary cosmologies (2006)
Liddle, Andrew R, Parkinson, David, Leach, Samuel M, Mukherjee, Pia
We use the three-year WMAP observations to determine the normalization of the matter power spectrum in inflationary cosmologies. In this context, the quantity of interest is not the normalization...
A Bayesian model selection analysis of WMAP3 (2006)
Parkinson, David, Mukherjee, Pia, Liddle, Andrew R
We present a Bayesian model selection analysis of WMAP3 data using our code CosmoNest. We focus on the density perturbation spectral index $n_S$ and the tensor-to-scalar ratio $r$, which define the...
Model selection forecasts for the spectral index from the Planck satellite (2006)
Pahud, Cédric, Liddle, Andrew R, Mukherjee, Pia, Parkinson, David
The recent WMAP3 results have placed measurements of the spectral index n_S in an interesting position. While parameter estimation techniques indicate that the Harrison-Zel'dovich spectrum n_S=1 is...
Measuring the effective complexity of cosmological models (2006)
Kunz, Martin, Trotta, Roberto, Parkinson, David
We introduce a statistical measure of the effective model complexity, called the Bayesian complexity. We demonstrate that the Bayesian complexity can be used to assess how many effective parameters a...
Universal fitting formulae for baryon oscillation surveys (2006)
Blake, Chris, Parkinson, David, Bassett, Bruce A., Glazebrook, Karl, Kunz, Martin, Nichol, Robert C.
The next generation of galaxy surveys will attempt to measure the baryon oscillations in the clustering power spectrum with high accuracy. These oscillations encode a preferred scale which may be...
Universal fitting formulae for baryon oscillation surveys (2006)
Blake, Chris, Parkinson, David, Bassett, Bruce A., Glazebrook, Karl, Kunz, Martin, Nichol, Robert C.
The next generation of galaxy surveys will attempt to measure the baryon oscillations in the clustering power spectrum with high accuracy. These oscillations encode a preferred scale which may be...
Model selection as a science driver for dark energy surveys (2005)
Mukherjee, Pia, Parkinson, David, Corasaniti, Pier Stefano, Liddle, Andrew R., Kunz, Martin
A key science goal of upcoming dark energy surveys is to seek time evolution of the dark energy. This problem is one of {\em model selection}, where the aim is to differentiate between cosmological...
Universal fitting formulae for baryon oscillation surveys (2005)
Blake, Chris, Parkinson, David, Bassett, Bruce, Glazebrook, Karl, Kunz, Martin, Nichol, Robert C.
The next generation of galaxy surveys will attempt to measure the baryon oscillations in the clustering power spectrum with high accuracy. These oscillations encode a preferred scale which may be...
A Nested Sampling Algorithm for Cosmological Model Selection (2005)
Mukherjee, Pia, Parkinson, David, Liddle, Andrew R.
The abundance of new cosmological data becoming available means that a wider range of cosmological models are testable than ever before. However, an important distinction must be made between...
Direct reconstruction of the quintessence potential (2005)
Sahlén, Martin, Liddle, Andrew R., Parkinson, David
We describe an algorithm which directly determines the quintessence potential from observational data, without using an equation of state parametrisation. The strategy is to numerically determine...
Bassett, Bruce A., Parkinson, David, Nichol, Robert C.
We highlight the flexibility of the IPSO experiment-design framework by contrasting its application to CMB, weak lensing and redshift surveys. We illustrate the latter with a 10 parameter MCMC...
Testing for double inflation with WMAP (2004)
Parkinson, David, Tsujikawa, Shinji, Bassett, Bruce A., Amendola, Luca
With the WMAP data we can now begin to test realistic models of inflation involving multiple scalar fields. These naturally lead to correlated adiabatic and isocurvature (entropy) perturbations with...
Parkinson, David, Bassett, Bruce A., Copeland, Edmund J., Corasaniti, Pier-Stefano, Kunz, Martin
Dark energy affects the CMB through its perturbations and affects both CMB and Sn-Ia through its background evolution. Using recent CMB and Sn-Ia data sets, together with the most general...
Ph.D. thesis submitted to the Division of Earth Sciences, University of Glasgow, 2004.
Kunz, Martin, Corasaniti, Pier-Stefano, Parkinson, David, Copeland, Edmund J.
By combining the recent WMAP measurements of the cosmic microwave background anisotropies and the results of the recent luminosity distance measurements to type-Ia supernovae, we find that the...
Mapping the Dark Energy with Varying Alpha (2003)
Parkinson, David, Bassett, Bruce A., Barrow, John D.
Cosmological dark energy is a natural source of variation of the fine structure constant. Using a model-independent approach we show that once general assumptions about the alpha-varying interactions...
Condensate cosmology -- dark energy from dark matter (2002)
Bassett, Bruce A., Kunz, Martin, Parkinson, David, Ungarelli, Carlo
Imagine a scenario in which the dark energy forms via the condensation of dark matter at some low redshift. The Compton wavelength therefore changes from small to very large at the transition, unlike...
Did the dark energy always have a large Compton wavelength? (2002)
Bassett, Bruce A., Kunz, Martin, Parkinson, David, Ungarelli, Carlo
Until now all well-studied dark energy models proposed have very large Compton wavelengths, $\lambda_c > 100 Mpc$ at all time and hence show no clustering on small scales. Evidence against this would...
Correlation-consistency cartography of the double inflation landscape (2002)
Tsujikawa, Shinji, Parkinson, David, Bassett, Bruce A.
We show explicitly some exciting features of double-inflation: (i) it can often lead to strongly correlated adiabatic and entropy (isocurvature) power spectra. (ii) The two-field slow-roll...
Adoption of the Multidivisional Structure: Analyzing History from the Start (1998)
KOGUT, BRUCE, PARKINSON, DAVID
The multidivisional structure represents one of the most studied and important organizational innovations. Chandler's historical account stresses the imitation effects of industry adoption, and of...
First Language Acquisition of Inuktitut (1997)
The CLAL-Parkinson corpus of Inuktitut child language data includes language from at least 30 children between 3.10.04 and 6.10.22 (years, months, days) (mean age: 5.06.27) acquiring Inuktitut as...