ChJAA Vol 6, No 1 (2006) (1-124) / Deng

Super-Large-Scale Structures in the Sloan Digital Sky Survey

Xin-Fa Deng, Yi-Qing Chen, Qun Zhang, Ji-Zhou He

Abstract

We study the super-large-scale structures in the Sloan Digital Sky Survey by cluster analysis, and examine the geometry and the properties of the member galaxies. Two subsamples are selected from the SDSS, Subsample 1 at the celestial equator and Subsample 2 further north. In Subsample 1 we discover two compact super-large-scale structures: the Sloan Great Wall and the CfA Great Wall. The Sloan Great Wall, located at a median redshift of z = 0.07804, has a total length of about 433 Mpc and a mean galaxy density of about six times that of the whole sample. Most of its member galaxies are of medium size and brightness. The CfA Great Wall, located at a median redshift of z = 0.03058, has a total length of about 251 Mpc and includes large percentages of faint and small galaxies and relatively fewer early-type galaxies.

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DOI: https://doi.org/10.1088/1009-9271/6/1/004

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