Generation of primordial cosmological density inhomogeneities with scale invariant power spectrum during the standard radiation dominated expansion of the universe

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dc.creatorOaknin, David H.
dc.date2007-07-01
dc.date2008-10-23
dc.date.accessioned2026-07-07T10:12:14Z
dc.date.available2026-07-07T10:12:14Z
dc.descriptionThe most distinctive feature of the primordial density inhomogeneities that existed in the cosmic plasma at the instant of decoupling is their scale invariant power spectrum ${\cal P}(k) \sim k$ over the range $k \ll H_{eq}$ of modes with cosmologically large comoving wavelength. We characterize this feature in real space, in terms of their correlation function at two points. We show that over cosmologically large comoving distances $r \gg H^{-1}_{eq}$ the primordial inhomogeneities were (anti)correlated as $f(r) \sim - r^{-4}$. We revisit the so-called {\it origin of structures problem} of the standard cosmology at the light of this observation. Our conclusions contradict the current wisdom on this issue.
dc.descriptionDiscussion about causality constrains expanded. In this new version the assumption of fluid incompressibility has been eliminated. Abstract revised. Conclusions unchanged
dc.identifierhttps://arxiv.org/abs/0707.0121
dc.identifierhttp://arxiv.org/abs/0707.0121
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/172117
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Theory
dc.titleGeneration of primordial cosmological density inhomogeneities with scale invariant power spectrum during the standard radiation dominated expansion of the universe
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