Séminaire Univers / |
| « Simulation-based large-scale structure inference » |
|
Florent Leclercq |
| The last few years have seen vast progress in the field of generative large-scale structure inference, which differs in intent from traditional measurements of statistical summaries from galaxy survey catalogues. In this talk, I will present the outcomes of recent methodological advances, aiming at fitting large-scale structure data with a very general numerical model: a noisy non-linear dynamical system with millions of latent variables. The proposed approach reduces the number of required simulations by several orders of magnitude, yet the computational cost remains a major challenge. As an answer, in a second part, I will introduce an innovative approach for embarrassingly parallel cosmological simulations, based on a spatial splitting of the considered volume in a frame comoving with Lagrangian Perturbation Theory observers. |
|
mardi 23 janvier 2018 - 11:15 Salle 281 Institut d'Astrophysique de Paris |
| Pages web du séminaire / Seminar's webpage |