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2018

Viscous Self Interacting Dark Matter Cosmology For Small Redshift

Atreya, Abhishek, Bhatt, Jitesh R., Mishra, Arvind Kumar

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The viscosity of dark matter in cosmological models may cause an accelerated expansion and when this effect is sufficiently large, it can explain the dark energy.

In this work, attributing the origin of viscosity to self-interaction of dark matter, we study the viscous cosmology at small redshift $(0\leq z\leq2.5)$.
Assuming the cluster scale to be virialized and by modeling a power law behavior of velocity gradients, we calculate the Hubble expansion rate, $H(z)$ and the deceleration parameter, $q(z)$.
We then perform a $\chi^{2}$ analysis to estimate the best fit model parameters.

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