1999/12/14 by C. R. Mullis, Christopher R. Mullis, Mullis, Christopher R.
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Scientific Research and Discoveries #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9912258
4 pages, 1 figure, oral contribution to "Large-Scale Structure in the X-ray Universe", Santorini, GREECE (September 1999) Additional figures and animations are available at http://www.ifa.hawaii.edu/~mullis/nep.html
arxiv created 1999/12/14 · openalex publication_date 1999/12/14 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We have used the ROSAT All-Sky Survey around the North Ecliptic Pole to construct a complete sample of galaxy clusters. The deep and contiguous nature of the survey affords us the opportunity to examine large-scale structure in the Universe on scales of hundreds of megaparsecs. We have identified over 99% of the 446 X-ray sources in the survey area. The cluster sample consists of 65 objects with redshifts approaching unity. Surprisingly, some 20% of the clusters exists in a wall-like structure at z=0.088 spanning the entire 9 deg x 9 deg survey region. This is a very significant extension of both the membership and the spatial extent to a known supercluster in this location.