290 citations · 1.8k across the 59 of their papers we have counts for
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Extracting the 21-cm Power Spectrum and the reionization parameters from mock datasets using Artificial Neural Networks
Madhurima Choudhury, Abhirup Datta, Suman Majumdar
Detection of the \hi~ 21-cm power spectrum is one of the key science drivers of several ongoing and upcoming low-frequency radio interferometers. However, the major challenge in su…
Large HI optical depth and Redshifted 21-cm signal from cosmic dawn
Kanan K. Datta, Raghunath Ghara, Ariful Hoque +1
The HI 21-cm optical depth () can be considerably large as the kinetic and spin temperature of the inter-galactic medium (IGM) is expected to be very low during cosmic dawn. I…
Revisiting the [C II] line-intensity mapping power spectrum from the EoR using non-uniform line-luminosity scatter
Chandra Shekhar Murmu, Karen P. Olsen, Thomas R. Greve +9
Detecting the line-intensity mapping (LIM) signal from the galaxies of the Epoch of Reionization is an emerging tool to constrain their role in reionization. Ongoing and upcoming e…
A maximum likelihood estimate of the parameters of the FRB population
Siddhartha Bhattacharyya, Himanshu Tiwari, Somnath Bharadwaj +1
We consider a sample of non-repeating FRBs detected at Parkes, ASKAP, CHIME and UTMOST each of which operates over a different frequency range and has a different detection cr…
CII and HI 21-cm line intensity mapping from the EoR: Impact of the light-cone effect on auto and cross-power spectra
Chandra Shekhar Murmu, Suman Majumdar, Kanan K. Datta
CII line intensity mapping (LIM) is a potential technique to probe the early galaxies from the Epoch of Reionization (EoR). Several experiments e.g. CONCERTO, TIME, CCAT-p are unde…
Probing IGM Physics during Cosmic Dawn using the Redshifted 21-cm Bispectrum
Mohd Kamran, Suman Majumdar, Raghunath Ghara +5
With the advent of the first luminous sources at Cosmic Dawn (CD), the redshifted 21-cm signal, from the neutral hydrogen in the Inter-Galactic Medium (IGM), is predicted to underg…
Improving constraints on the reionization parameters using 21-cm bispectrum
Himanshu Tiwari, Abinash Kumar Shaw, Suman Majumdar +2
Radio interferometric experiments aim to constrain the reionization model parameters by measuring the 21-cm signal statistics, primarily the power spectrum. However the Epoch of Re…
A fast estimator for quantifying the shape dependence of the 3D bispectrum
Abinash Kumar Shaw, Somnath Bharadwaj, Debanjan Sarkar +3
The dependence of the bispectrum on the size and shape of the triangle contains a wealth of cosmological information. Here we consider a triangle parameterization which allows us t…
The Epoch of Reionization 21-cm Bispectrum: The impact of light-cone effects and detectability
Rajesh Mondal, Garrelt Mellema, Abinash Kumar Shaw +2
We study the spherically averaged bispectrum of the 21-cm signal from the Epoch of Reionization (EoR). This metric provides a quantitative measurement of the level of non-Gaussiani…
Redshifted 21-cm bispectrum II: Impact of the spin temperature fluctuations and redshift space distortions on the signal from the Cosmic Dawn
Mohd Kamran, Raghunath Ghara, Suman Majumdar +5
We present a study of the 21-cm signal bispectrum (which quantifies the non-Gaussianity in the signal) from the Cosmic Dawn (CD). For our analysis, we have simulated the 21-cm sign…