منابع مشابه
The Density Contrast of the Shapley Supercluster
We calculate the density contrast of the Shapley Supercluster (SSC) based on the enhanced abundance of X-ray clusters in it, using the extended Press-Schechter formalism. We derive a total SSC mass of Mtot = (3.5 ± 0.35) × 10 16 M⊙ within a sphere of 50 Mpc centered at a distance of about 160 Mpc. The nonlinear fractional density contrast of the sphere is (1 + δ) = 1.39 ± 0.13 relative to the m...
متن کاملThe Large Scale Distribution of Galaxies in the Shapley Supercluster
We present new results of our wide-field redshift survey of galaxies in a 182 square degree region of the Shapley Supercluster (SSC) based on observations with the FLAIRII spectrograph on the UK Schmidt Telescope (UKST). In this paper we present new measurements to give a total sample of redshifts for 710 bright (R ≤ 16.6) galaxies, of which 464 are members of the SSC (8000 < v < 18000kms ). Ou...
متن کاملDetection of filamentary X-ray structure in the core of the Shapley supercluster
We report on X-ray observations of the core of the Shapley Supercluster. Combining data from pointed observations of the ROSAT PSPC detector and data from the ROSAT All-Sky Survey, the observed region covers an area of 6◦ × 3◦. It contains the central clusters A3562, A3558 and A3556. We find clear evidence for X-ray emission connecting the three clusters. This confirms the existence of a filame...
متن کاملShapley Optical Survey . I : Luminosity Functions in the Supercluster Environment ⋆
We present the Shapley Optical Survey, a photometric study covering a ∼ 2 deg2 region of the Shapley Supercluster core at z∼0.05 in two bands (B and R). The galaxy sample is complete to B = 22.5 (>M+6, Ngal = 16 588), and R = 22.0 (>M+7, Ngal = 28 008). The galaxy luminosity function cannot be described by a single Schechter function due to dips apparent at B ∼ 17.5 (MB ∼ 19.3) and R ∼ 17.0 (MR...
متن کاملPSPC observations of the Shapley Supercluster : A 3562
We present a combined analysis of the BeppoSAX and ROSAT PSPC observation of the cluster of galaxies A3562, a massive member of the core of the Shapley Supercluster. With a complex and interacting structure composed from two groups of galaxies and A3558 to the West, the surface brightness of A3562 shows excess in the sectors to East and South when compared with an azimuthally averaged model of ...
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ژورنال
عنوان ژورنال: Publications of the Astronomical Society of Australia
سال: 1999
ISSN: 1323-3580,1448-6083
DOI: 10.1071/as99113