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galaxies: clustering

Publications of the Astronomical Society of Australia (1)

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The Large-scale Distribution of Radio Sources
Michael J. Drinkwater, Robert W. Schmidt
Journal:

Publications of the Astronomical Society of Australia / Volume 13 / Issue 2 / May 1996

Published online by Cambridge University Press:

25 April 2016, pp. 127-131
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We have used a sample of 263 Parkes half-Jansky flat-spectrum radio sources to measure the spatial correlation function of radio galaxies and radio-loud quasars on scales up to 1000 h−1 Mpc. We do not detect any clustering in the sample. If any undetected clustering is described by a power-law spatial correlation function [ξ(r) = (r/r0)−1·8], we can rule out clustering with scales r0 ≥ 50 h−1 Mpc at the 99·9% confidence level. We have also used the sample to test for the ‘possible’ large concentration of quasars in the direction of the microwave background dipole found by Shaver (1987). There is no evidence for such a concentration in our data and we show that the earlier result was probably biased by the use of non-uniform image classifications.