Status: Bibliographieeintrag
Standort: ---
Exemplare:
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| Online-Ressource |
Verfasst von: | Jamali, Sara [VerfasserIn]  |
| Roshan, Mahmood [VerfasserIn]  |
| Amendola, Luca [VerfasserIn]  |
Titel: | On the cosmology of scalar-tensor-vector gravity theory |
Verf.angabe: | Sara Jamali, Mahmood Roshan and Luca Amendola |
Fussnoten: | Gesehen am 19.10.2017 |
Titel Quelle: | Enthalten in: De.arxiv.org |
Jahr Quelle: | 2017 |
Band/Heft Quelle: | (2017) Artikel-Nummer 1707.02841, 16 Seiten |
Abstract: | We consider the cosmological consequences of a special scalar-tensor-vector theory of gravity, known as MOG in the literature, proposed to address the dark matter problem. This theory introduces two scalar fields $G(x)$ and $\mu(x)$, and one vector field $\phi_{\alpha}(x)$, in addition to the metric tensor. We set the corresponding self-interaction potentials to zero, as in the standard form of MOG. Then using the phase space analysis in the flat Friedmann-Robertson-Walker background, we show that the theory possesses a viable sequence of cosmological epochs with acceptable time dependency for the cosmic scale factor. We also investigate MOG's potential as a dark energy model and show that extra fields in MOG can not provide a late time accelerated expansion. Furthermore, using a dynamical system approach to solve the non-linear field equations numerically, we calculate the angular size of the sound horizon, i.e. $\theta_{\text{s}}$, in MOG. We find that $8\times 10^{-3}\text{rad}<\theta_{\text{s}}<8.2\times 10^{-3} \text{rad} $ which is way outside the current observational bounds. Finally we generalize MOG to find a model that passes the sound-horizon constraint and might produce a viable version of MOG. |
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Kostenfrei: Verlag: http://arxiv.org/abs/1707.02841 |
Datenträger: | Online-Ressource |
Sprache: | eng |
K10plus-PPN: | 1564571408 |
Verknüpfungen: | → Sammelwerk |
On the cosmology of scalar-tensor-vector gravity theory / Jamali, Sara [VerfasserIn] (Online-Ressource)
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