Quantifying angular clustering in wide-area radio surveys

Details Quantifying angular clustering in wide-area radio surveys Quantifying angular clustering in wide-area radio surveys

2002-08-19

arxiv.org/abs/astro-ph/0208350v1

Mon.Not.Roy.Astron.Soc. 337 (2002) 993

Astronomy and Astrophysics

Astrophysics

26 pages, 13 figures, accepted for publication in MNRAS

Scientific paper

10.1046/j.1365-8711.2002.05979.x

We quantify the angular clustering of radio galaxies in the NVSS and FIRST radio surveys using the two-point correlation function and the moments of counts-in-cells - both important points of comparison with theory. These investigations consistently demonstrate that the slope of the correlation function for radio galaxies agrees with that for optically-selected galaxies, gamma = 1.8. We describe how to disentangle the imprint of galaxy clustering from the two observational problems: resolution of radio galaxies into multiple components and gradients in source surface density induced by difficulties in processing "snapshot" radio observations (significant in both surveys below 15 mJy). This study disagrees in some respects with previous analyses of the angular clustering of radio galaxies.

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