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29 March 2024
 
  » arxiv » astro-ph/0006066

 Article overview


The 1-point PDF of the Initial Conditions of our Local Universe from the IRAS PSC redshift catalogue
P. Monaco ; G. Efstathiou ; S. J. Maddox ; E. Branchini ; C. S. Frenk ; R. G. McMahon ; S. J. Oliver ; M. Rowan-Robinson ; W. Saunders ; W. J. Sutherland ; H. Tadros ; S. D. M. White ;
Date 5 Jun 2000
Journal Mon.Not.Roy.Astron.Soc. 318 (2000) 681
Subject astro-ph
AbstractThe algorithm ZTRACE of Monaco & Efstathiou (1999) is applied to the IRAS PSCz catalogue to reconstruct the initial conditions of our local Universe with a resolution down to ~5 Mpc/h. The 1-point PDF of the reconstructed initial conditions is consistent with the assumptions that (i) IRAS galaxies trace mass on scales of ~5 Mpc/h, and (ii) the statistics of primordial density fluctuations is Gaussian. We use simulated PSCz catalogues, constructed from N-body simulations with Gaussian initial conditions, to show that local non-linear bias can cause the recovered initial PDF (assuming no bias) to be non-Gaussian. However, for plausible bias models, the distortions of the recovered PDF would be difficult to detect using the volume finely sampled by the PSCz catalogue. So, for Gaussian initial conditions, a range of bias models remain compatible with our PSCz reconstruction results.
Source arXiv, astro-ph/0006066
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