Astronomy seminar

Cosmography of the local Universe based in X-ray Galaxy Clusters

Hans Böhringer

We use our statistically complete and well defined CLASSIX Cluster Survey based on the ROSAT X-ray sky to map the density distribution in the local Universe. We find that our immediate neighborhood out to about 85 - 170 Mpc is less dense than the mean density on large scales and that the structures in this region are mostly concentrated around the Supergalactic plane. We identify the largest superclusters, most of which are well known, and characterise them with our new statistical approach. The largest structure found out to a redshift of z = 0.03 is the Perseus-Pisces supercluster.

Seminar takes place in Tartu Observatory, Tõravere and is streamed over Zoom.

All 2023/24 seminars.