Mapping the Universe with the Lyman alpha forest

Lead Research Organisation: University College London
Department Name: Physics and Astronomy

Abstract

The study of the large scale structure of the Universe can answer some of the most important and challenging questions in physics: the nature of the dark energy causing the acceleration of the Universe; the inflationary origin of the density fluctuations; the physical properties of the dark matter component; and the number of neutrino species and their mass. A novel and exciting approach is to study this structure by looking at the distribution of intergalactic gas as seen in absorption features in the spectra of very high redshift quasars, a phenomenon known as the Lyman alpha forest. The goal of this project is to develop a theoretical framework to model the clustering of the Lyman alpha forest, and compare the predictions to recent and future observations from different international surveys (mainly BOSS and DESI) to provide new insights on dark energy, the nature of dark matter, the mass of the neutrinos and the initial stages of the Universe.

Publications

10 25 50

Studentship Projects

Project Reference Relationship Related To Start End Student Name
ST/R505183/1 01/10/2017 30/09/2021
1923402 Studentship ST/R505183/1 01/10/2017 30/09/2020 James Farr
 
Description Through this award, I developed new software to generate synthetic datasets for testing analysis pipelines. This has already been used in one major analysis, and will be used extensively in the next 5 years as the Dark Energy Spectroscopic Instrument (DESI) begins to make measurements.

Additionally, I developed methods to make best use of classification tools in DESI. This will be used in the near future to improve DESI's data pipeline.
Exploitation Route The outcomes of this funding will continue to be developed by members of DESI in the coming years.
Sectors Other