The Cosmic Large-Scale Structure in X-rays (CLASSIX) Cluster Survey

It is important to map the large-scale matter distribution in local Universe for cosmological studies, such as tracing of peculiar velocity flow, characterisation environment different astronomical objects, and precision measurements parameters. We used X-ray luminous clusters this find that about 51% groups are members superclusters which occupy only a few percent volume. In paper we provide detailed description these structures. With friends-to-friends algorithm, eight with cluster overdensity ratio at least two five or more galaxy group cosmic volume out z = 0.03. The four most prominent ones Perseus-Pisces, Centaurus, Coma, Hercules supercluster, lengths from 40 over 100 Mpc estimated masses 0.6 ? 2.2 × 10 16 M ? . largest structures Perseus-Pisces supercluster. smaller include Local Abell 400 supercluster constellations Sagittarius Lacerta. maps, member catalogues, physical descriptions superclusters. By constructing range sub-samples lower luminosity limits, show main always reliably recovered.