High accuracy Power Spectra at high redshift in Dynamical Dark Energy simulations

L. Casarini, A. V. Macciò, S. A. Bonometto

Research output: Contribution to journalArticlepeer-review


Accurate predictions on non-linear power spectra, at various redshift z, will be a basic tool to interpret cosmological data from next generation mass probes. We need then high precision simulations, exploring the functional space of w (a) DE state equations, for the admitted cosmological parameter ranges. A procedure was however suggested, making recourse to suitable w = const. auxiliary models, and yielding a ∼1% precision at z = 0. The precision of this procedure, however, worsens at higher z. Here we follow a different criterion for high z. Our N-body gravitational simulations then show that auxiliary w = const. models still meet given w (a) model spectra within 1% at z = 0, but are much better at higher redshift, where they approach a permil precision.

Original languageEnglish (US)
Pages (from-to)185-189
Number of pages5
JournalNuclear Physics B - Proceedings Supplements
Issue numberC
StatePublished - Oct 2009

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics


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