A journey in cosmic web filaments

December 13, 2021
3:00pm to 4:00pm

Online on Zoom

Theoretical Physics, general interest
Nabila Aghanim
Institut d'Astrophysique Spatiale, Paris

Online on Zoom


The cosmic web is made of nodes, filaments, sheets and voids that are well traced by the distribution of galaxies. Numerical simulations suggest that about 40% of the total baryons in the cosmic web are in the form of warm/hot baryons hidden in the filamentary structure between clusters of galaxies.

I will present how large cosmological simulations together with the combined use of surveys in the optical, in the millimeter (via the Sunyaev-Zel'dovich signal measured by Planck) and in the X-rays allows us to study the largest structures of the Universe and to use them as cosmological probes. Combining these observables, we detect the cosmic web elements, measure their gas content and tackle the problem of characterising and quantifying the hot hidden baryons in the filamentary structure of the cosmic web.