A fluctuation analysis for optical cluster galaxies - I. Theory

D Windridge*, S Phillipps

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

3 Citations (Scopus)


It is evident that considerable information exists in astronomical data below the threshold for the detection of individual sources (perhaps set for a '5 sigma' total detection, or for isophotal detection thresholds of '2 sigma' above the sky background), and that such information, if descriptive of an underlying population of objects characterized by a relatively small parameter set, could in principle be used to set constraints on these parameters. We therefore derive a general theoretical framework for fluctuation analysis (after the radio astronomers' 'P(D)' analysis) of optical imaging data on faint galaxy fields, in particular; on fields containing rich clusters of galaxies, in an attempt to determine the Schechter luminosity function of the dwarf galaxies that dominate the statistics at this magnitude range.

Original languageEnglish
Pages (from-to)591-605
Number of pages15
JournalMonthly Notices of the Royal Astronomical Society
Issue number2
Publication statusPublished - 1 Dec 2000

Bibliographical note

Publisher: Blackwell Science


  • techniques : image processing
  • galaxies : clusters : general
  • galaxies : luminosity function, mass function

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