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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…
Revealing the Nature of Dark Energy Using Bayesian Evidence
T. D. Saini, J. Weller, S. L. Bridle
We apply the Bayesian concept of `evidence' to reveal systematically the nature of dark energy from present and future supernova luminosity distance measurements. We express the un…
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…
A Regularized Free Form Estimator for Dark Energy
Tarun Deep Saini
We construct a simple, regularized estimator for the dark energy equation of state by using the recently introduced linear response approximation. We show that even a simple regula…
Response of distance measures to the equation of state
Tarun Deep Saini, T. Padmanabhan, Sarah Bridle
We show that the distance measures (such as the luminosity and angular diameter distances) are linear functionals of the equation-of-state function w(z) of the dark energy to a fai…