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arXiv · 2105.07883

The cosmological behaviour and the statefinder diagnosis for the New Tsallis agegraphic dark energy

Umesh Kumar Sharma·Shikha Srivastava
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Abstract

In this work, we have considered the recently proposed new Tsallis Agegraphic Dark Energy model (NTADE) (Mod. Phys. Lett. A 34, 1950086, 2019) within the framework of a flat Friedmann-Robertson-Walker(FRW) Universe by taking various values of the parameter $\delta$. The NTADE model shows the current phase transition of the Universe from decelerated to accelerated phase. The NTADE EoS parameter shows a rich behaviour as it can be quintessence-like or phantom-like depending on the value of $\delta$. For discriminating the NTADE model from $\Lambda$CDM, we have plotted the statefinder parameters $r(z)$, $s(z)$ and $(r, s)$, $(r, q)$ pair. The NTADE model shows distinct evolutionary trajectories of their evolution in ($ r, s$) and ($ r, q$) plane. An analysis using the snap parameter and the $\omega_{D}-\omega_{D}^{'}$ pair dynamical analysis have also been performed.

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Umesh Kumar Sharma, Shikha Srivastava. 2021-05-14. The cosmological behaviour and the statefinder diagnosis for the New Tsallis agegraphic dark energy. https://doi.org/10.1142/s0217732320503186

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