Connecting the Galactic and Cosmological Scales: Dark Energy and the Cuspy-Core Problem

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dc.creatorSpeliotopoulos, A. D.
dc.date2007-12-03
dc.date.accessioned2026-07-07T08:46:51Z
dc.date.available2026-07-07T08:46:51Z
dc.descriptionWe propose a solution to the `cuspy-core' problem by extending the geodesic equations of motion using the Dark Energy length scale $λ_{DE}=c/(Λ_{DE} G)^{1/2}$. This extension does not affect the motion of photons; gravitational lensing is unchanged. A cosmological check of the theory is made, and $σ_8$ is calculated to be $0.68_{\pm0.11}$, compared to $0.761_{-0.048}^{+0.049}$ for WMAP. We estimate the fractional density of matter that cannot be determined through gravity at $0.197_{\pm 0.017}$, compared to $0.196^{+0.025}_{-0.026}$, the fractional density of nonbaryonic matter. The fractional density of matter that can be determined through gravity is estimated at $0.041_{-0.031}^{+0.030}$, compared to $0.0416_{-0.0039}^{+0.0038}$ for $Ω_B$.
dc.descriptionEleven pages, written in RevTex. This letter submitted for publication reports on the results of the analysis found in the preprint 0711.3124 [astro-ph]. Moreover, the value of $Ω_{asymp}$ has been corrected to 0.197, and $Omega_{Dyn}$ has been corrected to 0.041. Please refer to the longer paper for the detailed calculations and theory
dc.identifierhttps://arxiv.org/abs/0712.0216
dc.identifierhttp://arxiv.org/abs/0712.0216
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/143393
dc.subjectAstrophysics
dc.titleConnecting the Galactic and Cosmological Scales: Dark Energy and the Cuspy-Core Problem
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