465 citations · 5k across the 107 of their papers we have counts for
5 papers · 1 filter
Constraining Thawing Dark Energy using Galaxy Cluster Number Counts
N. Chandrachani Devi, T. Roy Choudhury, Anjan A. Sen
We study the formation of galaxy clusters in the presence of thawing class of scalar field dark energy. We consider cases where the scalar field has canonical as well non canonical…
Data-constrained reionization and its effects on cosmological parameters
Stefania Pandolfi, Andrea Ferrara, T. Roy Choudhury +2
We perform an analysis of the recent WMAP7 data considering physically motivated and viable reionization scenarios with the aim of assessing their effects on cosmological parameter…
Constraining large scale HI bias using redshifted 21-cm signal from the post-reionization epoch
Tapomoy Guha Sarkar, Sourav Mitra, Suman Majumdar +1
In the absence of complex astrophysical processes that characterize the reionization era, the 21-cm emission from neutral hydrogen (HI) in the post-reionization epoch is believed t…
Joint QSO-CMB constraints on reionization history
Sourav Mitra, T. Roy Choudhury, Andrea Ferrara
Based on the work by Mitra, Choudhury & Ferrara (2010), we obtain model-independent constraints on reionization from cosmic microwave background (CMB) and QSO absorption line data…
Reply to [arXiv:1105.5653]: "Comment on 'Quasinormal modes in Schwarzschild-de Sitter spacetime: A simple derivation of the level spacing of the frequencies'"
T. Roy Choudhury, T. Padmanabhan
We explain why the analysis in our paper [Phys. Rev. D 69, 064033 (2004), arXiv:gr-qc/0311064 ] is relevant and correct.