Publications (83)
Cross-correlation of the HI 21-cm Signal and Lyman-alpha Forest: A Probe Of Cosmology
Tapomoy Guha Sarkar, Somnath Bharadwaj, Tirthankar Roy Choudhury +1
The Life and Science of Thanu Padmanabhan
Jasjeet Singh Bagla, Krishnakanta Bhattacharya, Sumanta Chakraborty +21
CosmoReionMC: A package for estimating cosmological and astrophysical parameters using CMB, Lyman-α absorption and global 21 cm data
Atrideb Chatterjee, Tirthankar Roy Choudhury, Sourav Mitra
Warm dark matter constraints from high-$z$ Direct Collapse Black Holes using the JWST
Pratika Dayal, Tirthankar Roy Choudhury, Fabio Pacucci +1
Heavy dark matter particle annihilation in dwarf spheroidal galaxies: radio signals at the SKA telescope
Arpan Kar, Sourav Mitra, Biswarup Mukhopadhyaya +1
Ruling out 3 keV warm dark matter using 21 cm-EDGES data
Atrideb Chatterjee, Pratika Dayal, Tirthankar Roy Choudhury +1
Dark matter annihilation in $Ï$ Centauri: Astrophysical implications derived from the MWA radio data
Arpan Kar, Biswarup Mukhopadhyaya, Steven Tingay +6
Conditioning halos on the tidal environment for fast and accurate HI power spectra during reionization
Gaurav Pundir, Tirthankar Roy Choudhury, Aseem Paranjape
A framework to mitigate patchy reionization contamination on the primordial gravitational wave signal
Divesh Jain, Tirthankar Roy Choudhury, Suvodip Mukherjee +1
Halo models of HI selected galaxies
Niladri Paul, Tirthankar Roy Choudhury, Aseem Paranjape
Probing the large scale structure using gravitational-wave observations of binary black holes
Aditya Vijaykumar, M. V. S. Saketh, Sumit Kumar +2
Simulating the epoch of Helium Reionization in photon-conserving semi-numerical code SCRIPT
Akanksha Kapahtia, Tirthankar Roy Choudhury
Cosmic backgrounds from the radio to the far-infrared: recent results and perspectives from cosmological and astrophysical surveys
Carlo Burigana, Elia Sefano Battistelli, Laura Bonavera +8
Modelling the star-formation activity and ionizing properties of high-redshift galaxies
Anirban Chakraborty, Tirthankar Roy Choudhury
Lyman-alpha emitters gone missing: the different evolution of the bright and faint populations
Lewis H. Weinberger, Girish Kulkarni, Martin G. Haehnelt +2
Gravitational Wave Informed Inference of 21-cm Global Signal Parameters
Avinash Tiwari, Sajad A. Bhat, Tirthankar Roy Choudhury +3
Efficient exploration of reionization parameters for the upcoming 21 cm observations using a photon conserving semi-numerical model SCRIPT
Barun Maity, Tirthankar Roy Choudhury
First study of reionization in tilted flat and untilted non-flat dynamical dark energy inflation models
Sourav Mitra, Chan-Gyung Park, Tirthankar Roy Choudhury +1
Disentangling patchy reionization signatures from primordial gravitational waves using CMB $E$-mode and $B$-mode polarization
Divesh Jain, Suvodip Mukherjee, Tirthankar Roy Choudhury
A White Paper on The Multi-Messenger Science Landscape in India
Samsuzzaman Afroz, Sanjib Kumar Agarwalla, Dipankar Bhattacharya +35
Large 21 cm signals from AGN-dominated reionization
Girish Kulkarni, Tirthankar Roy Choudhury, Ewald Puchwein +1
CMB constraints on a physical model of reionization
Tirthankar Roy Choudhury, Suvodip Mukherjee, Sourabh Paul
Three- and two-point spatial correlations of IGM at $z\sim 2$: Cloud based analysis using simulations
Soumak Maitra, Raghunathan Srianand, Prakash Gaikwad +3
Detailed study of ELAIS N1 field with the uGMRT -- II. Source Properties and Spectral Variation Of Foreground Power Spectrum from 300-500 MHz Observations
Arnab Chakraborty, Nirupam Roy, Abhirup Datta +8
A hint on the metal-free star formation rate density from 21cm-EDGES data
Atrideb Chatterjee, Pratika Dayal, Tirthankar Roy Choudhury +1
Reionization with galaxies and active galactic nuclei
Pratika Dayal, Marta Volonteri, Tirthankar Roy Choudhury +6
Dark energy constraints from the 21~cm intensity mapping surveys with SKA1
Bikash R. Dinda, Anjan A Sen, Tirthankar Roy Choudhury
First multi-redshift limits on post-Epoch of Reionization (post-EoR) 21 cm signal from z = 1.96 - 3.58 using uGMRT
Arnab Chakraborty, Abhirup Datta, Nirupam Roy +8
ELAIS-N1 deep field uGMRT Band-2: constraints on diffuse Galactic synchrotron emission power spectrum
Rashmi Sagar, Abhirup Datta, Arnab Chakraborty +13
Accelerating HI density predictions during the Epoch of Reionization using a GPR-based emulator on N-body simulations
Gaurav Pundir, Aseem Paranjape, Tirthankar Roy Choudhury
Bubble mapping with the Square Kilometer Array -- I. Detecting galaxies with Euclid, JWST, WFIRST and ELT within ionized bubbles in the intergalactic medium at z>6
Erik Zackrisson, Suman Majumdar, Rajesh Mondal +16
Do astrophysical data disfavour the minimal supersymmetric standard model?
Arpan Kar, Sourav Mitra, Biswarup Mukhopadhyaya +1
The mass assembly of high-redshift black holes
Olmo Piana, Pratika Dayal, Marta Volonteri +1
The impact of black hole feedback on the UV luminosity and stellar mass assembly of high-redshift galaxies
Olmo Piana, Pratika Dayal, Tirthankar Roy Choudhury
Lognormal semi-numerical simulations of the Lyman-$α$ forest: comparison with full hydrodynamic simulations
Bhaskar Arya, Tirthankar Roy Choudhury, Aseem Paranjape +1
Nearest Neighbour-Based Statistics for 21cm-Galaxy Cross-Correlations in the Epoch of Reionization
Anirban Chakraborty, Kwanit Gangopadhyay, Arka Banerjee +1
A consistent and robust measurement of the thermal state of the IGM at $2 \leq z \leq 4$ from a large sample of Ly$α$ forest spectra: Evidence for late and rapid HeII reionization
Prakash Gaikwad, Raghunathan Srianand, Martin G. Haehnelt +1
First study of reionization in the Planck 2015 normalized closed $Î$CDM inflation model
Sourav Mitra, Tirthankar Roy Choudhury, Bharat Ratra
Using Artificial Neural Networks to extract the 21-cm Global Signal from the EDGES data
Madhurima Choudhury, Atrideb Chatterjee, Abhirup Datta +1
Reionization and Galaxy Formation in Warm Dark Matter Cosmologies
Pratika Dayal, Tirthankar Roy Choudhury, Volker Bromm +1
Reconciling large-scale Lyman-$α$ correlations with the SCRIPT Semi-numerical Model
Saptarshi Sarkar, Tirthankar Roy Choudhury
Detailed study of the ELAIS N1 field with the uGMRT - I. Characterizing the 325 MHz foreground for redshifted 21 cm observations
Arnab Chakraborty, Abhirup Datta, Samir Choudhuri +8
Multi-wavelength mock galaxy catalogs of the low-redshift Universe
Aseem Paranjape, Tirthankar Roy Choudhury, Ravi K. Sheth
The hierarchical assembly of galaxies and black holes in the first billion years: predictions for the era of gravitational wave astronomy
Pratika Dayal, Elena M. Rossi, Banafsheh Shiralilou +3
Overview of 21cm Experiments at high redshift with SKAO
CD Science Working Group, Gianni Bernardi, Daniela Breitman +81
Efficient adiabatic hydrodynamical simulations of the high-redshift intergalactic medium
Prakash Gaikwad, Tirthankar Roy Choudhury, Raghunathan Srianand +1
SCRIPT in the Cosmic Dawn: Distinguishing Redshift-Evolving Galaxy Populations with 21-cm Fluctuations
Janakee Raste, Tirthankar Roy Choudhury
Constraints on dark matter annihilation in dwarf spheroidal galaxies from low frequency radio observations
Arpan Kar, Sourav Mitra, Biswarup Mukhopadhyaya +2
Inevitable imprints of patchy reionization on the cosmic microwave background anisotropy
Sourabh Paul, Suvodip Mukherjee, Tirthankar Roy Choudhury
Effect of non-equilibrium ionization on derived physical conditions of the high-$z$ intergalactic medium
Prakash Gaikwad, Raghunathan Srianand, Vikram Khaire +1
The redshift evolution of escape fraction of hydrogen ionizing photons from galaxies
Vikram Khaire, Raghunathan Srianand, Tirthankar Roy Choudhury +1
Efficient hybrid technique for generating sub-grid haloes in reionization simulations
Ankur Barsode, Tirthankar Roy Choudhury
A fast method of reionization parameter space exploration using GPR trained SCRIPT
Barun Maity, Aseem Paranjape, Tirthankar Roy Choudhury
Probing intergalactic radiation fields during cosmic reionization through gamma-ray absorption
Susumu Inoue, Ruben Salvaterra, Tirthankar Roy Choudhury +3
The distribution of HI velocity profiles in a $Î$CDM universe
Aseem Paranjape, R. Srianand, Tirthankar Roy Choudhury +1
Probing the Physics of Reionization Using kSZ Power Spectrum from Current and Upcoming CMB Surveys
Divesh Jain, Tirthankar Roy Choudhury, Srinivasan Raghunathan +1
Covariance matrices for the Lyman-$α$ forest using the lognormal approximation
Bhaskar Arya, Aseem Paranjape, Tirthankar Roy Choudhury
Warm Dark Matter constraints from the joint analysis of CMB, Lyman-$α$, and global 21 cm data
Atrideb Chatterjee, Tirthankar Roy Choudhury
A Short Introduction to Reionization Physics
Tirthankar Roy Choudhury
Can an Anti-de Sitter Vacuum in the Dark Energy Sector Explain JWST High-Redshift Galaxy and Reionization Observations?
Anirban Chakraborty, Tirthankar Roy Choudhury, Anjan Ananda Sen +1
Astro2020 Science White Paper: A proposal to exploit galaxy-21cm synergies to shed light on the Epoch of Reionization
Anne Hutter, Pratika Dayal, Sangeeta Malhotra +26
Measuring the reionization 21 cm fluctuations using clustering wedges
Dinesh Raut, Tirthankar Roy Choudhury, Raghunath Ghara
Prospects of constraining reionization model parameters using Minkowski tensors and Betti numbers
Akanksha Kapahtia, Pravabati Chingangbam, Raghunath Ghara +2
Probing the fluctuating Ultra-violet background using the Hubble Frontier Fields
Tirthankar Roy Choudhury, Pratika Dayal
VoIgt profile Parameter Estimation Routine (VIPER): H I photoionization rate at z<0.5
Prakash Gaikwad, Raghunathan Srianand, Tirthankar Roy Choudhury +1
Constraining the reionization and thermal history of the Universe using a semi-numerical photon-conserving code SCRIPT
Barun Maity, Tirthankar Roy Choudhury
Lyman-alpha emitters gone missing: evidence for late reionization?
Tirthankar Roy Choudhury, Ewald Puchwein, Martin G. Haehnelt +1
Accelerating reionization constraints: An ANN-emulator framework for the SCRIPT Semi-numerical Model
Saptarshi Sarkar, Tirthankar Roy Choudhury
Astraeus II: Quantifying the impact of cosmic variance during the Epoch of Reionization
Graziano Ucci, Pratika Dayal, Anne Hutter +6
Intergalactic Lyman continuum photon budget in the past 5 billion years
Prakash Gaikwad, Vikram Khaire, Tirthankar Roy Choudhury +1
Three- and two-point spatial correlations of intergalactic medium at $z\sim 2$ using projected quasar triplets
Soumak Maitra, Raghunathan Srianand, Patrick Petitjean +4
A modified lognormal approximation of the Lyman-$α$ forest: comparison with full hydrodynamic simulations at $2\leq z\leq 2.7$
Bhaskar Arya, Tirthankar Roy Choudhury, Aseem Paranjape +1
Is patchy reionization an obstacle in detecting the primordial gravitational wave signal?
Suvodip Mukherjee, Sourabh Paul, Tirthankar Roy Choudhury
Unbiased constraints on reionization model parameters in presence of the foreground wedge
Dinesh Raut, Tirthankar Roy Choudhury
Probing Reionization-Era Galaxies with JWST UV Luminosity Functions and Large-Scale Clustering
Anirban Chakraborty, Tirthankar Roy Choudhury
Reionization and its sources
Anirban Chakraborty, Tirthankar Roy Choudhury
Constraining large scale HI bias using redshifted 21-cm signal from the post-reionization epoch
Tapomoy Guha Sarkar, Sourav Mitra, Suman Majumdar +1
Can SKA--Phase 1 go much beyond the LHC in supersymmetry search?
Arpan Kar, Sourav Mitra, Biswarup Mukhopadhyaya +1
Probing the thermal history during reionization using a semi-numerical photon-conserving code SCRIPT
Barun Maity, Tirthankar Roy Choudhury
Models of the Cosmological 21 cm Signal from the Epoch of Reionization Calibrated with Lyman-alpha and CMB Data
Girish Kulkarni, Tirthankar Roy Choudhury, Ewald Puchwein +1
Studying the morphology of HI isodensity surfaces during reionization using Shapefinders and percolation analysis
Satadru Bag, Rajesh Mondal, Prakash Sarkar +3
Capturing Small-Scale Reionization Physics: A Sub-Grid Model for Photon Sinks with SCRIPT
Tirthankar Roy Choudhury, Anirban Chakraborty
Dark matter, extra-terrestrial gamma-rays and the MSSM: a viability study
Arpan Kar, Sourav Mitra, Biswarup Mukhopadhyaya +1