"Galaxy clusters and cosmic filaments in the first eROSITA all-Sky survey"

In the prevalent hiearchical model of structure formation, the distribution of matter in the Universe forms a cosmic web where massive clusters of galaxies are connected together by large-scale filaments. Hence, the number density and spatial distribution of galaxy clusters accross cosmic times holds precious clues as to the nature and abundance of different cosmic constituents, in particular the perplexing Dark Energy which is believed to accelerate cosmic expansion. Filaments also plays an important role in that context, since they are postulated to contain a thin and warm ionized gas component, the WHIM, that so far eluded observations, but could make up as much as 30% of baryonic matter in the local Universe. X-rays observations, which trace the distribution of hot (>10^6 K) plasmas, are a method of choice for studying both type of objects. In this talk, I will present cosmological results from the first public release of the eROSITA satellite mission, which was set to perform a new generation All-Sky X-ray survey and constrain the nature of Dark Energy with more than 100,000 galaxy clusters. This will include, in particular, new constraints on the equation of strate of Dark energy, the absolute mass scale of neutrinos, as well as unprecedented direct detections of a few cosmic filaments.

Transmisión en vivo vía biy.ly/YouTube_ICF

Participante: Dr. Florian Pacaud

Institución: University of Bonn, Alemania

Fecha y hora: Este evento terminó el Miércoles, 17 de Abril de 2024