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Morphology of the supercluster-void network in LCDM cosmology
S. F. Shandarin, J. V. Sheth, V. Sahni
We report here the first systematic study of the supercluster-void network in the LCDM concordance cosmology in which voids and superclusters are treated on an equal footing. Super…
Is there Supernova Evidence for Dark Energy Metamorphosis ?
Ujjaini Alam, Varun Sahni, Tarun Deep Saini +1
We reconstruct the equation of state of dark energy (DE) using a recently released data set containing 172 type Ia supernovae without assuming the prior (in c…
Exploring the Expanding Universe and Dark Energy using the Statefinder Diagnostic
Ujjaini Alam, Varun Sahni, Tarun Deep Saini +1
The coming few years are likely to witness a dramatic increase in high quality Sn data as current surveys add more high redshift supernovae to their inventory and as newer and deep…
Can dark energy be decaying?
Ujjaini Alam, Varun Sahni, A. A. Starobinsky
We explore the fate of the universe given the possibility that the density associated with `dark energy' may decay slowly with time. Decaying dark energy is modeled by a homogeneou…