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General relativisitic, nonstrandard model for the dark sector of the Universe

Stichel, P.C.; Zakrzewski, W.J.

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Authors

P.C. Stichel

W.J. Zakrzewski



Abstract

We present a general relativistic version of the self-gravitating fluid model for the dark sector of the Universe (darkon fluid) introduced in Stichel and Zakrzewski (Phys Rev D 80:083513, 2009) and extended and reviewed in Stichel and Zakrzewski (Entropy 15:559, 2013). This model contains no free parameters in its Lagrangian. The resulting energy-momentum tensor is dustlike with a nontrivial energy flow. In an approximation valid at sub-Hubble scales we find that the present-day cosmic acceleration is not attributed to any kind of negative pressure but it is due to a dynamically determined negative energy density. This property turns out to be equivalent to a time-dependent spatial curvature. The obtained cosmological equations, at sub-Hubble scales, agree with those of the nonrelativistic model but they are given a new physical interpretation. Furthermore, we have derived the self-consistent equation to be satisfied by the nonrelativistic gravitational potential produced by a galactic halo in our model from a weak-field limit of a generalized Tolman–Oppenheimer–Volkoff equation.

Citation

Stichel, P., & Zakrzewski, W. (2015). General relativisitic, nonstrandard model for the dark sector of the Universe. The European Physical Journal C, 75(1), Article 9. https://doi.org/10.1140/epjc/s10052-014-3218-3

Journal Article Type Article
Acceptance Date Dec 4, 2014
Online Publication Date Jan 14, 2015
Publication Date Jan 14, 2015
Deposit Date Jan 29, 2015
Publicly Available Date Nov 10, 2016
Journal European Physical Journal C: Particles and Fields
Print ISSN 1434-6044
Electronic ISSN 1434-6052
Publisher SpringerOpen
Peer Reviewed Peer Reviewed
Volume 75
Issue 1
Article Number 9
DOI https://doi.org/10.1140/epjc/s10052-014-3218-3

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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
© The Author(s) 2014 Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited. Funded by SCOAP3 / License Version CC BY 4.0.





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