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School of Physics and Astronomy

GR simulations in cosmology

Queen Mary University of London, 7 & 8 September 2020

The detailed observation of cosmological large-scale structure with the next generation of astronomical surveys will bring the opportunity to study the precise geometry of the spacetime we inhabit. If general relativity holds, this will undoubtedly unravel some key information about the nature of the “dark” components of the Universe. However, to interpret the data correctly, we also need to up the game in our theoretical and numerical modelling.

This specialised workshop aims to bring together the young and active community that has set out to explore relativistic aspects of cosmology with numerical simulations. Developers of some of the state-of-the-art computational tools (Einstein Toolkit, gevolution, GRAMSES) will give overview presentations and lead hands-on tutorials to show how these tools can be used effectively for research projects in cosmology. While some numerical skills will be useful, no prior experience with any of the specific codes is required. Participants will also have the opportunity to present their research in short contributed talks (schedule below). The abstracts of these talks can be found here.

Important notice: Due to the ongoing public health emergency we have decided to hold the complete workshop remotely using a web conferencing platform (Zoom). It will not be necessary to travel. Participation is free of charge, please register by filling out this form (abstract submission closed on 14. August).

Schedule for Day 1 (7. September 2020)

Time (UK)Event
from 9.30 AM virtual reception
10.00 AM Cristian Barrera-Hinojosa (Durham)
"Exploring the vector modes in LCDM with GRAMSES simulations"
10.30 AM Michele Grasso (PAS)
"BiGONLight: a new tool for light propagation in numerical relativity"
11.00 AM bring-your-own coffee break
11.30 AM Daniel Price (Monash)
"Crazy ideas for GR in cosmology"
12.00 NOON Hayley Macpherson (Cambridge)
"An improved calculation of cosmological backreaction in simulations with numerical relativity"
12.30 PM lunch break
2.00 PM James Mertens (Washington U, St. Louis)
"Cosmograph & N-body in NR"
2.30 PM GR codes question time
3.00 PM bring-your-own tea & biscuits break
3.30 PM ET tutorial
4.30 PM bring-your-own tea & biscuits break
5.00 PM GRAMSES tutorial
6.00 PM bring-your-own drinks

Schedule for Day 2 (8. September 2020)

Time (UK)Event
10.00 AM Katy Clough (Oxford) + Josu Aurrekoetxea (KCL)
"GRChombo : Initial conditions for inflation, and beyond!"
10.30 AM Julian Adamek (U Zurich)
"gevolution, a precision tool for weak-field GR"
11.00 AM bring-your-own coffee break
11.30 AM Francesca Lepori (Geneva)
"Weak lensing observables in relativistic N-body simulations"
12.00 NOON Caroline Macedo Guandalin (São Paulo)
"Relativistic Effects in the Halo Two-Point Statistics"
12.30 PM lunch break
2.00 PM gevolution tutorial
3.00 PM bring-your-own tea & biscuits break
3.30 PM GR simulations playground
6.00 PM end