Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.260..241c&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 260, no. 2, p. 241-252.
Astronomy and Astrophysics
Astronomy
65
Angular Correlation, Faint Objects, Galactic Clusters, Galactic Evolution, Astronomical Photography, Astronomical Photometry, Calibrating, Charge Coupled Devices, Data Reduction
Scientific paper
We present new results on the angular correlation function of galaxies, w(theta), and its evolution with apparent magnitude at VR of less than 23.5 mag. The analysis has been carried out on a data set containing 116,000 galaxies covering almost 4 sq deg at high galactic latitudes, obtained with the Berkeley f/1 CCD camera on the 3.9-m Anglo-Australian Telescope. We find that, at scales less than 0.2 deg, w(theta) is well described by a pure power law, w(theta) varies inversely as theta exp -0.70 +/- 0.05, with no evidence for any systematic change in the value of the power-law index with apparent magnitude limit. The strength of clustering (as measured by the amplitude of the correlation function) is found to decrease strongly with apparent magnitude, consistent with a model in which galaxy clustering is increasing at a rate R(z) varies inversely as (1 + z) with cosmic epoch. As such, this result is inconsistent with the predicted linear growth rate of structure, R(z) varies inversely as (1 + z) exp -1, in the 'standard' cold dark matter model of galaxy formation.
Boyle Brian J.
Couch Warrick J.
Jurcevic John S.
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