Publications by authors named "W J Percival"
We examine the cosmological implications of measurements of the void-galaxy cross-correlation at redshift z=0.57 combined with baryon acoustic oscillation (BAO) data at 0.1
The combination of multiple observational probes has long been advocated as a powerful technique to constrain cosmological parameters, in particular dark energy. The Dark Energy Survey has measured 207 spectroscopically confirmed type Ia supernova light curves, the baryon acoustic oscillation feature, weak gravitational lensing, and galaxy clustering. Here we present combined results from these probes, deriving constraints on the equation of state, w, of dark energy and its energy density in the Universe.
View Article and Find Full Text PDFLow-redshift measurements of baryon acoustic oscillations (BAO) measure the late-time evolution of the Universe and are a vital probe of dark energy. Over the past decade both the 6-degree Field Galaxy Survey (6dFGS) and Sloan Digital Sky Survey Main Galaxy Sample (SDSS MGS) have provided important distance constraints at [Formula: see text] < 0.3.
View Article and Find Full Text PDFArticle Synopsis
- Euclid is a space mission by the European Space Agency launched in 2020, aimed at exploring the accelerated expansion of the universe.
- The mission will study galaxy shapes, red-shifts, and galaxy cluster distributions to enhance understanding of dark energy and cosmic evolution.
- This review highlights key topics in cosmology, including dark energy, modified gravity, dark matter, and data analysis methodologies guiding the mission's scientific focus.