Game of Gravities: Disputing the dark with galaxy surveys - Ben Bose (University of Geneva)

Wednesday 17 Jun 2020, 13:15 → 14:00 Europe/Stockholm

Upcoming large-scale structure surveys will be able to measure the galaxy distribution to an unprecedented degree of accuracy, putting us in a position to learn a lot more about our Universe and the forces that have formed it. The amount we are able to learn though depends on how reliably we can model the physics we assume we are observing. Further, if we relax our assumptions about the physics, then the reliability and even availability of current predictive methods breaks down. In the first part of this talk I will present a promising method of accurately modelling non-standard physics in the matter power spectrum on linear to very non-linear scales. The second part will present a publicly available code, ReACT, that employs this method and can be directly applied to cosmic shear observations. Finally, I will present some applications of the code, including modified gravity forecasts for LSST and applications to galaxy clustering analyses.