Information content in the halo-model dark-matter power spectrum - II. multiple cosmological parameters

Mark C. Neyrinck, István Szapudi

Research output: Contribution to journalLetter

32 Citations (Scopus)

Abstract

We investigate the cosmological Fisher information in the non-linear dark matter power spectrum in the context of the halo model. We find that there is a plateau in information content on translinear scales which is generic to all cosmological parameters we tried. There is a rise in information on smaller scales, but we find that it is quite degenerate among different cosmological parameters (except, perhaps, the tilt). This suggests that it could be difficult to constrain cosmological parameters using the non-linear regime of the dark-matter power spectrum. We suggest ways to get around this problem, such as removing the largest haloes from consideration in survey analysis.

Original languageEnglish
Pages (from-to)L51-L55
JournalMonthly Notices of the Royal Astronomical Society: Letters
Volume375
Issue number1
DOIs
Publication statusPublished - Feb 1 2007

Keywords

  • Cosmology: theory
  • Large-scale structure of universe

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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