Information content in the halo-model dark-matter power spectrum

Mark C. Neyrinck, I. Szapudi, Christopher D. Rimes

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

Using the halo model, we investigate the cosmological Fisher information in the non-linear dark-matter power spectrum about the initial amplitude of linear power. We find that there is little informationon'translinear' scales (where the one- and two-halo terms are both significant) beyond what is onlinear scales, but that additional information ispresent onsmall scales, where the one-halo term dominates. This behaviour agrees with the surprising results that Rimes & Hamilton found using N-body simulations. We argue that the translinear plateau in cumulative information arises largely from fluctuations in the numbers of large haloes in a finite volume. This implies that more information could be extracted on non-linear scales if the masses of the largest haloes in a survey are known.

Original languageEnglish
JournalMonthly Notices of the Royal Astronomical Society: Letters
Volume370
Issue number1
DOIs
Publication statusPublished - Jul 2006

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power spectra
halos
dark matter
rime
Fisher information
plateau
plateaus
simulation

Keywords

  • Cosmology: theory
  • Dark matter
  • Large-scale structure of Universe

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Information content in the halo-model dark-matter power spectrum. / Neyrinck, Mark C.; Szapudi, I.; Rimes, Christopher D.

In: Monthly Notices of the Royal Astronomical Society: Letters, Vol. 370, No. 1, 07.2006.

Research output: Contribution to journalArticle

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