1.5k citations · 4.5k across the 20 of their papers we have counts for
20 papers
Are and tensions generic to present cosmological data?
Archita Bhattacharyya, Ujjaini Alam, Kanhaiya Lal Pandey +2
Yes, for a wide range of cosmological models (CDM, non-interacting CDM or models with possible interactions between dark energy and dark matter, in either phantom or non-ph…
An Exploration of Heterogeneity in Supernova Type Ia Samples
Ujjaini Alam, Jeremie Lasue
We examine three SNe Type Ia datasets: Union2.1, JLA and Panstarrs to check their consistency using cosmology blind statistical analyses as well as cosmological parameter fitting.…
Constraining the Cosmology of the Phantom Brane using Distance Measures
Ujjaini Alam, Satadru Bag, Varun Sahni
The phantom brane has several important distinctive features: (i) Its equation of state is phantom-like, but there is no future `big rip' singularity, (ii) the effective cosmologic…
Nonparametric Reconstruction of the Dark Energy Equation of State from Diverse Data Sets
Tracy Holsclaw, Ujjaini Alam, Bruno Sanso +4
The cause of the accelerated expansion of the Universe poses one of the most fundamental questions in physics today. In the absence of a compelling theory to explain the observatio…
Reconstructing Dark Energy : A Comparison of Cosmological Parameters
Alexander V. Pan, Ujjaini Alam
A large number of cosmological parameters have been suggested for obtaining information on the nature of dark energy. In this work, we study the efficacy of these different paramet…
Nonparametric Dark Energy Reconstruction from Supernova Data
Tracy Holsclaw, Ujjaini Alam, Bruno Sanso +4
Understanding the origin of the accelerated expansion of the Universe poses one of the greatest challenges in physics today. Lacking a compelling fundamental theory to test, observ…