465 citations · 5k across the 107 of their papers we have counts for
7 papers · 1 filter
Halo models of HI selected galaxies
Niladri Paul, Tirthankar Roy Choudhury, Aseem Paranjape
Modelling the distribution of neutral hydrogen (HI) in dark matter halos is important for studying galaxy evolution in the cosmological context. We use a novel approach to infer th…
First study of reionization in the Planck 2015 normalized closed CDM inflation model
Sourav Mitra, Tirthankar Roy Choudhury, Bharat Ratra
We study reionization in two non-flat CDM inflation models that best fit the Planck 2015 cosmic microwave background anisotropy observations, ignoring or in conjunction with bar…
Do astrophysical data disfavour the minimal supersymmetric standard model?
Arpan Kar, Sourav Mitra, Biswarup Mukhopadhyaya +1
If the minimal supersymmetric standard model (MSSM) is the only new physics around the TeV-scale, it has to account for the entire dark matter relic density, or else it will cease…
Measuring the reionization 21 cm fluctuations using clustering wedges
Dinesh Raut, Tirthankar Roy Choudhury, Raghunath Ghara
One of the main challenges in probing the reionization epoch using the redshifted 21 cm line is that the magnitude of the signal is several orders smaller than the astrophysical fo…
Efficient adiabatic hydrodynamical simulations of the high-redshift intergalactic medium
Prakash Gaikwad, Tirthankar Roy Choudhury, Raghunathan Srianand +1
We present a post-processing tool for GADGET-2 adiabatic simulations to model various observed properties of the Ly forest at that enables an efficient param…
Warm dark matter constraints from high- Direct Collapse Black Holes using the JWST
Pratika Dayal, Tirthankar Roy Choudhury, Fabio Pacucci +1
We use a semi-analytic model, , that jointly tracks the dark matter and baryonic assembly of high-redshift () galaxies to gain insight on the number de…