Identification of Superclusters and Their Properties in the Sloan Digital Sky Survey Using the WHL Cluster Catalog

This paper presents a large catalog of 662 superclusters identified using a modified Friends of Friends algorithm applied to the WHL cluster catalog from the Sloan Digital Sky Survey (SDSS). The catalog covers a redshift range of 0.05 ≤ z ≤ 0.42 and a sky area of ~14,000 deg². The median mass of the superclusters is ~5.8 × 10¹⁵ M⊙, and the median size is ~65 Mpc. The properties of the observed superclusters are compared with mock superclusters from the Horizon Run 4 cosmological simulation, showing broad agreement. A correlation between supercluster density contrast and maximum extent is found, following a power law with an index of α ~ -2. The study also investigates the influence of the supercluster environment on cluster growth.

Shishir Sankhyayan, Joydeep Bagchi, Elmo Tempel, Surhud More, Maret Einasto, Pratik Dabhade, Somak Raychaudhury, Ramana Athreya, Pekka Heinämäki