January 23, 2021

A cosmic colossus brings together eight galaxy clusters

Color image of the density map of galaxies.

Color image of the density map of galaxies.

A new cosmic giant composed of eight clusters of galaxies grouped has been identified in the data from the eFEDS (eROSITA Final Equatorial Depth Survey).

This newly found supercluster, which is found among the largest structures in the known universe, It consists of eight clusters of galaxies.

Finding superclusters, which contain various structures with a variety of masses, from massive and dense galaxy clusters to bridges, filaments, and sheets of low-density matter, may be essential in improving our understanding of the formation and evolution of large cosmic filaments. .

Now, a group of astronomers led by Vittorio Ghirardini of the Max Planck Institute for Extraterrestrial Physics in Garching, Germany, reports the discovery of a new supercluster in arXiv.

The supercluster consists of a chain of eight galaxy clusters with a redshift of 0.36. Observations show that the northernmost groups of this structure are undergoing significant off-axis fusion activity. Optical and X-ray data suggest that it is a triple fusion system with a double fusion and a prefusion.

The group designated eFEDS J093513.3 + 004746, which resides in the northern part of the supercluster, is the most massive and luminous of the eight. It is also one of the most massive and luminous groups in the entire field of eFEDS. Its mass was calculated at 580 billion solar masses.

The less massive clusters in this supercluster, eFEDS J093546.4-000115 and eFEDS J093543.9-000334, have masses of about 130 trillion solar masses. The masses of the remaining five clusters are estimated to be between 140 and 250 trillion solar masses.

Further, the data revealed the existence of two radio emission relics in the northern and southeastern region of the northernmost cumulus clouds and an elongated radius halo, which also supports the ongoing melting activity scenario.

Overall, the study reports that the X-ray properties of the eight groups that make up the new supercluster are similar to those of the common population of the eFEDS survey group. Furthermore, its morphological properties are also consistent with the sample of more than 300 clusters identified by eFEDS.


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