SO Colloquium – Filaments: from the large-scale structure to the CGM

I will present a characterisation of filamentary structures at different scales, from the large-scale cosmic filaments forming the skeleton of the cosmic web, to the smaller-scale filaments playing a crucial role in the circum-galactic medium (CGM).

Using the outputs of recent large-scale hydro-dynamical simulations, I will focus on some fundamental properties of filaments at z=0, and show how cosmic filaments evolved since z=4. In the second part of my talk, I will zoom into CGM scales to show how the smaller-scale filaments (or streams) influence the star-formation activity of galaxies, and present the latest observational detections using a combination of the miniJPAS and DESI datasets. I will conclude on the importance of understanding the multi-scale nature of the cosmic web and discuss prospects for observing filamentary structures with current and future multi-wavelength datasets.

Fecha y lugar: 02/07/2026 – 12:30 | Salón de Actos
Daniela Galárraga Espinosa
Kavli Institute for the Physics and Mathematics of the Universe (IPMU) – Tokyo, Japan