34 citations · 235 across the 18 of their papers we have counts for
18 papers
Machine Learning and the SKA for Cosmic Dawn and the Epoch of Reionization
Anshuman Acharya, Michele Bianco, Daniela Breitman +18
When operational, the SKA will generate unprecedented amounts of data and provide exquisite sensitivity for 21 cm tomography of Cosmic Dawn (CD) and the Epoch of Reionization (EoR)…
Cosmology with Multi-Wavelength Line Intensity Mapping Synergies in the SKAO Era
Debanjan Sarkar, Suman Majumdar, Chandra Shekhar Murmu +21
Line intensity mapping (LIM) has emerged as a powerful tool for surveying the large-scale structure of the Universe across cosmic time by measuring spatial fluctuations in the cumu…
Cosmology with Intensity Mapping via Statistics Beyond the Power Spectrum in the SKAO Era
Suman Majumdar, Debanjan Sarkar, Leon Noble +38
The cosmological distribution of neutral hydrogen (HI) during the post-reionization era is highly non-Gaussian due to the underlying non-linear structure formation, complex galaxy…
Machine Learning-Driven Analysis of kSZ Maps to Predict CMB Optical Depth
Farshid Farhadi Khouzani, Abinash Kumar Shaw, Paul La Plante +2
Upcoming measurements of the kinetic Sunyaev-Zel'dovich (kSZ) effect, which results from Cosmic Microwave Background (CMB) photons scattering off moving electrons, offer a powerful…
From ANN to BNN: Inferring Reionization Parameters using Uncertainty-aware Emulators of 21-cm Summaries
Yashrajsinh Mahida, Sanjay Kumar Yadav, Suman Majumdar +6
Inferring astrophysical parameters from radio interferometric observations of the redshifted 21-cm signal from the Epoch of Reionization (EoR) is a challenging yet crucial task. Th…
The size and shape dependence of the SDSS galaxy bispectrum
Anindita Nandi, Sukhdeep Singh Gill, Debanjan Sarkar +3
We have measured the spherically averaged bispectrum of the SDSS main galaxy sample, considering a volume-limited data cube with mean galaxy number density $…
The monopole and quadrupole moments of the Epoch of Reionization (EoR) 21-cm bispectrum
Sukhdeep Singh Gill, Suman Pramanick, Somnath Bharadwaj +2
We study the monopole () and quadrupole () moments of the 21-cm bispectrum (BS) from EoR simulations and present results for squeezed and stretched triang…
SKA Science Data Challenge 2: analysis and results
P. Hartley, A. Bonaldi, R. Braun +105
The Square Kilometre Array Observatory (SKAO) will explore the radio sky to new depths in order to conduct transformational science. SKAO data products made available to astronomer…
Studying the Multi-frequency Angular Power Spectrum of the Cosmic Dawn 21-cm Signal
Abinash Kumar Shaw, Raghunath Ghara, Saleem Zaroubi +5
The light-cone (LC) anisotropy arises due to cosmic evolution of the cosmic dawn 21-cm signal along the line-of-sight (LoS) axis of the observation volume. The LC effect makes the…
Probing early universe through redshifted 21-cm signal: Modelling and observational challenges
Abinash Kumar Shaw, Arnab Chakraborty, Mohd Kamran +8
The redshifted 21-cm radiation from the atomic hydrogen (HI) provides an excellent direct probe to study the evolution of HI in IGM and thus reveal the nature of the first luminous…
Detecting galaxies in a large H{\sc i}~spectral cube
Abinash Kumar Shaw, Manoj Jagannath, Aishrila Mazumder +4
The upcoming Square Kilometer Array (SKA) is expected to produce humongous amount of data for undertaking H{\sc i}~science. We have developed an MPI-based {\sc Python} pipeline to…
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…
The impact of non-Gaussianity on the Epoch of Reionization parameter forecast using 21-cm power spectrum measurements
Abinash Kumar Shaw, Somnath Bharadwaj, Rajesh Mondal
Measurements of the Epoch of Reionization (EoR) 21-cm signal hold the potential to constrain models of reionization. In this paper we consider a reionization model with three astro…
Predictions for measuring the 21-cm multi-frequency angular power spectrum using SKA-Low
Rajesh Mondal, Abinash Kumar Shaw, Ilian T. Iliev +5
The light-cone (LC) effect causes the mean as well as the statistical properties of the redshifted 21-cm signal to change with frequency (or cosmic t…
The impact of non-Gaussianity on the error covariance for observations of the Epoch of Reionization 21-cm power spectrum
Abinash Kumar Shaw, Somnath Bharadwaj, Rajesh Mondal
Recent simulations show the Epoch of Reionization (EoR) 21-cm signal to be inherently non-Gaussian whereby the error covariance matrix of the 21-cm power spectrum…
A method to determine the evolution history of the mean neutral Hydrogen fraction
Rajesh Mondal, Somnath Bharadwaj, Ilian T. Iliev +4
The light-cone (LC) effect imprints the cosmological evolution of the redshifted 21-cm signal along the frequency axis which is the line of sight (L…