Large-Scale Structure in the ROSAT North Ecliptic Pole Survey

Details Large-Scale Structure in the ROSAT North Ecliptic Pole Survey Large-Scale Structure in the ROSAT North Ecliptic Pole Survey

1999-12-14

arxiv.org/abs/astro-ph/9912258v1

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure, oral contribution to "Large-Scale Structure in the X-ray Universe", Santorini, GREECE (September 1999) Addi

Scientific paper

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.

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