An international team of astronomers discovered a new astronomical cluster. By analyzing data from the eROSITA Final Equatorial Depth Survey, or eFEDS.
The newly discovered structure consists of eight galactic groups. The discovery was reported in a paper published December 21 on the arXiv website.
Superclusters contain various structures with a range of masses, from massive, dense galaxy clusters to low-density bridges, strings and plates of matter, and are among the largest structures in the known universe.
Finding and investigating giant clusters in detail could be essential to improving our understanding of the formation and evolution of cosmic large filaments.
Ghirardini et al
And now, a group of astronomers led by Vittorio Gherardini of the Max Planck Institute for Extraterrestrial Physics in Garching, Germany, reported the discovery of a new super cluster. The structure was determined by eFEDS scanning during the performance verification (PV) phase.
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The supercluster consists of a series of eight galaxy clusters at a redshift of 0.36. Observations show that the northern agglomerations of this structure are undergoing significant off-axis fusion activity. Optical and X-ray data indicate that it is a triple merging system with double fusion and pre-merging.
The eFEDS group, classified as J093513.3 + 004746, residing in the northern part of the super cluster, is the largest and largest of the eight groups. It is also one of the largest and brightest groups in the entire eFEDS survey. Its mass has been calculated at 580 trillion solar masses.
The least dense clusters of this supercluster, eFEDS J093546.4-000115 and eFEDS J093543.9-000334, have masses of about 130 trillion solar masses.
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The remaining five groups are estimated to have between 140 and 250 trillion solar masses.
Moreover, the data revealed the presence of two pieces of radio residue in the northern and southeastern regions of the northern clusters and a long radio halo, which also supports the scenario of continuous fusion activity.
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The presence of an elongated radio halo linking the radio remnants of eFEDS J093513.3 + 004746 and eFEDS J093510.7 + 004910 indicates that the block is undergoing a major fusion process. This is supported by an oceanographic map of the galaxy’s density that shows two peaks in the northern and southern regions of the cluster system, according to astronomers.
Overall, the study indicates that the X-ray properties of the eight clusters that make up the new supermass are similar to those in the common eFEDS group. Moreover, their morphological characteristics are also consistent with a sample of more than 300 groups identified by eFEDS.
Source: phys.org
