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1 PublicationMass density vs. energy density at cosmological scales
Eingorn, M.; Yilmaz, E.; Yukselci, A. E.; Zhuk, O.
In the presence of the gravitational field, the energy density of matter no longer coincides with its mass density. A discrepancy exists, of course, also between the associated power spectra. Within the ΛCDM model, we derive a formula that relates the power spectrum of the energy density to that of the mass density and test it with the help of N-body simulations run in comoving boxes of 2.816 Gpc/h. The results confirm the validity of the derived formula and simultaneously show that the power spectra diverge significantly from one another at large cosmological scales.
Keywords: N-body simulations; large-scale structure; inhomogeneous Universe; cosmological perturbations; power spectrum; cosmic screening
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Data publication: Mass density vs. energy density at cosmological scales
ROBIS: 37511 HZDR-primary research data are used by this (Id 37510) publication
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Physics Letters B 851(2024), 138564
DOI: 10.1016/j.physletb.2024.138564
arXiv: 2309.02989 [gr-qc]
Permalink: https://www.hzdr.de/publications/Publ-37510