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Confronting Braneworld Cosmology with Supernova data and Baryon Oscillations
Ujjaini Alam, Varun Sahni
Braneworld cosmology has several attractive and distinctive features. For instance the effective equation of state in braneworld models can be both quintessence-like (w_0 \geq -1)…
Quantum effects, soft singularities and the fate of the universe in a braneworld cosmology
Petr Tretyakov, Aleksey Toporensky, Yuri Shtanov +1
We examine a class of braneworld models in which the expanding universe encounters a "quiescent" future singularity. At a quiescent singularity, the energy density and pressure of…
Smoothing Supernova Data to Reconstruct the Expansion History of the Universe and its Age
Arman Shafieloo, Ujjaini Alam, Varun Sahni +1
We propose a non-parametric method of smoothing supernova data over redshift using a Gaussian kernel in order to reconstruct important cosmological quantities including H(z) and w(…
Cosmic Mimicry: Is LCDM a Braneworld in Disguise ?
Varun Sahni, Yuri Shtanov, Alexander Viznyuk
For a broad range of parameter values, braneworld models display a remarkable property which we call cosmic mimicry. Cosmic mimicry is characterized by the fact that, at low redshi…
Exploring the Geometry, Topology and Morphology of Large Scale Structure using Minkowski Functionals
Jatush V. Sheth, Varun Sahni
Modern redshift surveys such as the 2 degree field Galaxy Redshift Survey (2dFGRS) and the Sloan Digital Sky Survey (SDSS) reveal the fully 3 dimensional distribution of a million…
Cosmological Surprises from Braneworld models of Dark Energy
Varun Sahni
Properties of Braneworld models of dark energy are reviewed. Braneworld models admit the following interesting possibilities: (i) The effective equation of state can be w < -1 as w…