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Type: Artigo de periódico
Title: Gravity with Extra Dimensions and Dark Matter Interpretation: Phenomenological Example via Miyamoto-Nagai Galaxy
Author: Letelier, P
Coimbra-Araujo, CH
Abstract: Any connection between dark matter and extra dimensions is revealed by the effective energy-momentum tensor associated with the theory. In order to investigate and test such a relationship, we examine a higher-dimensional space-time endowed with a factorizable general metric with a configuration such that its density profile coincides with the Newtonian potential for disk galaxies. An appropriate solution representing stratifications of mass in the central-bulge and disk part of galaxies, e.g., the Miyamoto-Nagai ansatz, is used to solve the Einstein equations. We compute the stable rotation curves of such systems and, with no adjustable parameters, accurately recover the observational data for flat or not asymptotically flat galaxy rotation curves. We present examples of density profiles and compare them to the profile obtained from purely Newtonian potentials.
Subject: Galaxies
Miyamoto-Nagai configurations
Dark matter
Rotation curves
Country: EUA
Editor: Springer
Citation: Brazilian Journal Of Physics. Springer, v. 42, n. 41671, n. 100, n. 109, 2012.
Rights: fechado
Identifier DOI: 10.1007/s13538-012-0059-0
Date Issue: 2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

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