A Cluster of High Redshift Quasars with Apparent Diameter 2.3 Degrees

TL;DR

This paper reports the discovery of a large, high-redshift quasar cluster spanning over 2.3 degrees on the sky, with 14 quasars closely grouped in redshift, suggesting a significant cosmic structure.

Contribution

It presents the identification of a high-redshift quasar cluster with an unusually large apparent diameter, highlighting potential large-scale cosmic structures.

Findings

14 quasars clustered at z ≈ 2.149

Cluster spans over 2.3 degrees on the sky

Estimated physical diameter exceeds 180 Mpc

Abstract

During analysis of the relation of quasars to galaxies in the 2dF deep field a concentration of quasars was noted. Most striking was the closeness in redshift of 14 quasars about the mean redshift z = 2.149 with a range of $\pm 0.018$. The cluster in spite of its high redshift subtends an area of diameter more than 2.3 degrees on the sky. At conventional redshift distance its diameter would be 181 mega parsecs and the back should be receding with about $10,000 km/s$ with respect to the front.