2010/07/31 by M. Baldi, Marco Baldi, Matteo Viel +1 · 34 citations
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #COSMIC cancer database #Cosmology and Gravitation Theories #Coupling (piping) #Dark energy #Dark matter #Flux (metallurgy) #Galaxies: Formation, Evolution, Phenomena #Intergalactic travel #Limit (mathematics) #Lyman limit #Range (aeronautics) #Spectral density #astro-ph.CO
paper · pdf · doi:10.1111/j.1745-3933.2010.00954.x
published in Monthly Notices of the Royal Astronomical Society Letters 409(1), L89-L93 (Oxford University Press) · 6 pages, 2 figures. Minor revisions. Published in MNRAS Letters
openalex publication_date 2010/10/20 · arxiv created 2011/01/31 · arxiv updated 2015/05/19 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Abstract We present an analysis of high-resolution hydrodynamical N-body simulations of coupled dark energy cosmologies which focuses on the statistical properties of the transmitted Lyman α flux in the high-redshift intergalactic medium (IGM). In these models the growth of the diffuse cosmic web differs from the standard ΛCDM case: the density distribution is skewed towards underdense regions and the matter power spectra are typically larger (in a scale-dependent way). These differences are also appreciable in the Lyman α flux and are larger than 5 per cent (10 per cent) at z= 2–4 in the flux probability distribution function (pdf) for high-transmissivity regions and for values of the coupling parameter β= 0.08 (β= 0.2). The flux power spectrum is also affected at the ∼2 per cent (∼5–10 per cent) level for β= 0.08 (β= 0.2) in a redshift-dependent way. We infer the behaviour of flux pdf and flux power for a reasonable range of couplings and present constraints using present high- and low-resolution data sets. We find an upper limit β≲ 0.15 (at 2σ confidence level), which is obtained using only IGM data and is competitive with those inferred from other large-scale structure probes.