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

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

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Stichel, PeterUniBi; Zakrzewski, W. J.
Abstract / Bemerkung
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.
Erscheinungsjahr
2015
Zeitschriftentitel
The European Physical Journal C
Band
75
Ausgabe
1
Art.-Nr.
9
ISSN
1434-6044
Finanzierungs-Informationen
Open-Access-Publikationskosten wurden durch die Universität Bielefeld im Rahmen von SCOAP$^3$ – Sponsoring Consortium for Open Access Publishing in Particle Physics gefördert.
Page URI
https://pub.uni-bielefeld.de/record/2717488

Zitieren

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, Peter, and Zakrzewski, W. J. 2015. “General relativistic, nonstandard model for the dark sector of the Universe”. The European Physical Journal C 75 (1): 9.
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): 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, : 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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2019-09-06T09:18:29Z
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arXiv: 1409.1363

Inspire: 1315094

SCOAP3: 8773

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