23-25 September 2020
America/Bogota timezone

From the $\beta$-skeleton to the Cosmic Web elements

Sep 25, 2020, 9:40 AM
20m

Speaker

Mr John F. Suárez-Pérez (Universidad de los Andes)

Description

The spatial distribution of galaxies on large scales forms a striking filamentary pattern known as the cosmic web. Measuring and characterizing this pattern is one of the main goals in cosmology. There are algorithms that can perform this task using the full dark matter distribution as an input. However, in observations, the dark matter distribution is not observable. To bypass this limitation there are other types of algorithms that build a graph on top of an observed 3-dimensional galaxy distribution to roughly quantify the cosmic web patterns.
In this talk, I will show a Machine Learning-based approach that can link these two types of algorithms and help us to infer the dark matter cosmic web from observed galaxies. I use state-of-the-art cosmological simulations from the Illustris-TNG project as a training data-set.
I will present results for our cosmic web reconstruction methods and comment on its possible application on observational data from the Dark Energy Spectroscopic Instrument (DESI).

Primary authors

Mr John F. Suárez-Pérez (Universidad de los Andes) Yeimy Dallana Camargo Camargo (Universidad Nacional de Colombia) Dr Jaime Forero-Romero (Universidad de los Andes) Dr Xiao-Dong Li (School of Physics and Astronomy, Sun Yat-Sen University)

Presentation materials