Spatial density fluctuations and selection effects in galaxy redshift surveys

F.S. Labini, D. Tekhanovich, Y.V. Baryshev

Research output: Contribution to journalLiterature review

3 Scopus citations

Abstract

One of the main problems of observational cosmology is to determine the range in which a reliable measurement of galaxy correlations is possible. This corresponds to determining the shape of the correlation function, its possible evolution with redshift and the size and amplitude of large scale structures. Different selection effects, inevitably entering in any observation, introduce important constraints in the measurement of correlations. In the context of galaxy redshift surveys selection effects can be caused by observational techniques and strategies and by implicit assumptions used in the data analysis. Generally all these effects are taken into account by using pair-counting algorithms to measure two-point correlations. We review these methods stressing that they are based on the a-priori assumption that galaxy distribution is spatially homogeneous inside a given sample. We show that, when this assumption is not satisfied by the data, results of the correlation analysis are affected by finite size effe
Original languageEnglish
Pages (from-to)035
JournalJournal of Cosmology and Astroparticle Physics
Volume2014
Issue number07
DOIs
StatePublished - 2014

Keywords

  • large scale structure of the Universe
  • methods of statistical analysis
  • redshift surveys

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