General relativistic, nonstandard model for the dark sector of the Universe

Stichel P, Zakrzewski WJ (2015)
The European Physical Journal C 75(1): 9.

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Journal Article | Original Article | Published | English
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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.
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Open Access publishing charge funded by SCOAP$^3$ – Sponsoring Consortium for Open Access Publishing in Particle Physics and Bielefeld University.
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Stichel P, Zakrzewski WJ. General relativistic, nonstandard model for the dark sector of the Universe. The European Physical Journal C. 2015;75(1):9.
Stichel, P., & Zakrzewski, W. J. (2015). General relativistic, nonstandard model for the dark sector of the Universe. The European Physical Journal C, 75(1), 9. doi:10.1140/epjc/s10052-014-3218-3
Stichel, P., and Zakrzewski, W. J. (2015). General relativistic, nonstandard model for the dark sector of the Universe. The European Physical Journal C 75, 9.
Stichel, P., & Zakrzewski, W.J., 2015. General relativistic, nonstandard model for the dark sector of the Universe. The European Physical Journal C, 75(1), p 9.
P. Stichel and W.J. Zakrzewski, “General relativistic, nonstandard model for the dark sector of the Universe”, The European Physical Journal C, vol. 75, 2015, pp. 9.
Stichel, P., Zakrzewski, W.J.: General relativistic, nonstandard model for the dark sector of the Universe. The European Physical Journal C. 75, 9 (2015).
Stichel, Peter, and Zakrzewski, W. J. “General relativistic, nonstandard model for the dark sector of the Universe”. The European Physical Journal C 75.1 (2015): 9.
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