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- University of Tennessee at KnoxvilleUS110 papers
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Showing 2009 · astro-ph.COShow all
3 papers · 2 filters
astro-ph.CO2009★ 22 cited
Unparticle dark energy
De-Chang Dai, Sourish Dutta, Dejan Stojkovic
We examine a dark energy model where a scalar unparticle degree of freedom plays the role of quintessence. In particular, we study a model where the unparticle degree of freedom ha…
astro-ph.CO2009★ 72 cited
Slow-roll k-essence
Takeshi Chiba, Sourish Dutta, Robert J. Scherrer
We derive slow-roll conditions for thawing k-essence with a separable Lagrangian . We examine the evolution of the equation of state parameter, , as a function…
astro-ph.CO2009★ 39 cited
New Parametrization for the Scale Dependent Growth Function in General Relativity
James B. Dent, Sourish Dutta, Leandros Perivolaropoulos
We demonstrate the scale dependence of the growth function of cosmological perturbations in dark energy models based on General Relativity. This scale dependence is more prominent…