Colloquia

Nicolas Tejos – The intergalactic medium in inter-cluster filaments of the cosmic web

Colloquia

“The intergalactic medium in inter-cluster filaments of the cosmic web”

Nicolas Tejos

Millenium Institute of Astrophysics

Modern analyses of structure formation predict a universe tangled in a 'cosmic web' of dark matter, galaxies and diffuse baryons. Galaxies seem to follow the predicted cosmic web, but they only account for a small fraction (~10%) of baryons in the Universe. The vast majority of baryons reside in the intergalactic medium (IGM), but its actual three-dimensional distribution remains poorly constrained. In this talk, I will present observational results on the properties and distribution of the IGM in intercluster filaments of the cosmic web. We have carefully chosen a single QSO whose sightline intersects 7 intercluster filaments and observed it with HST/COS. Our results are consistent with a filamentary structure for the intercluster gas,and hint towards the presence of a warm-hot intergalactic medium (WHIM). Our novel experimental design provides a viable way to constrain the properties of the IGM in filaments of the cosmic web.

Place:
Auditorium of Physics Faculty

Date:
Wed 12th April 2017

Hour:
15:00