UCL Astrophysics Group


PhD Projects: Cosmology and Surveys


* Large-scale structure cosmology from the ESA Euclid space mission

Euclid [https://www.euclid-ec.org] will launch in 2023 and carry out the most detailed deep-Universe galaxy survey from Space ever made. Exciting new constraints on cosmological structure formation will be derived from the clustering of galaxies and general relativistic gravitational lensing effects. The student will join the Euclid Consortium and the Euclid team in the UCL Astrophysics Group to make key contributions to the measurement of cosmological signals and the modelling of cosmological, astrophysical, and observational signatures, both analytically and simulation-based.

Contact: Prof Benjamin Joachimi (b.joachimi AT ucl.ac.uk


* Mapping and Measuring the Universe with DESI

The PhD project will focus on extracting cosmological and astrophysical information from the Dark the Dark Energy Spectroscopic Instrument (DESI), which will map the 3D distribution of about 35 million galaxies. The work will use  statistical measures such as Minimum Spanning Tree to characterise the Cosmic Web in the galaxy distribution observed by DESI, beyond the 2-point statistics, and further AI approaches.

Contact: Prof Ofer Lahav (o.lahav AT ucl.ac.uk)


* Fundamental physics with future gravitational wave observatories

Gravitational waves are an exciting frontier at the intersection of physics, astronomy and cosmology. At present, the waves detected by LIGO and VIRGO emanate from relatively nearby objects in relation to the scale of the universe but, in the coming decades, new facilities (Einstein Telescope and Cosmic Explorer) will be sensitive enough to detect signals from across the entire Universe. Simultaneously, the LISA satellite mission will open up the low frequency band for observations, giving a multiband view of the extreme universe. There is a huge potential for new discoveries, such as probing phase transitions in the earliest moments of the universe or understanding how supermassive black holes are formed in our universe. The goal of this project is to create precise modelling of such signals, informing the planning and design of these exciting future facilities. The work will mainly be theoretical and computational in nature but will connect to the experimental context. 

Contact: Prof Hiranya Peiris (h.peiris AT ucl.ac.uk) and Prof Andrew Pontzen (a.pontzen AT ucl.ac.uk)


Related projects are also advertised under Cosmoparticle Physics and Extragalactic Astrophysics.