290 citations · 1.8k across the 59 of their papers we have counts for
8 papers · 1 filter
Prediction of the 21-cm signal from reionization: comparison between 3D and 1D radiative transfer schemes
Raghunath Ghara, Garrelt Mellema, Sambit K. Giri +3
Three-dimensional radiative transfer simulations of the epoch of reionization can produce realistic results, but are computationally expensive. On the other hand, simulations relyi…
On Asymptotic Standard Normality of the Two Sample Pivot
Rajeshwari Majumdar, Suman Majumdar
The asymptotic solution to the problem of comparing the means of two heteroscedastic populations, based on two random samples from the populations, hinges on the pivot underpinning…
Necessary and Sufficient Condition for Asymptotic Normality of Standardized Sample Means
Rajeshwari Majumdar, Suman Majumdar
The double sequence of standardized sample means constructed from an infinite sequence of square integrable independent random vectors in the plane with identically distributed coo…
On the Conditional Distribution of a Multivariate Normal given a Transformation - the Linear Case
Rajeshwari Majumdar, Suman Majumdar
We show that the orthogonal projection operator onto the range of the adjoint of a linear operator can be represented as where is an invertible linear operator. Using…
Quantifying the non-Gaussianity in the EoR 21-cm signal through bispectrum
Suman Majumdar, Jonathan R. Pritchard, Rajesh Mondal +3
The epoch of reionization (EoR) 21-cm signal is expected to be highly non-Gaussian in nature and this non-Gaussianity is also expected to evolve with the progressing state of reion…
A fast estimator for the bispectrum and beyond - A practical method for measuring non-Gaussianity in 21-cm maps
Catherine A Watkinson, Suman Majumdar, Jonathan R Pritchard +1
In this paper we establish the accuracy and robustness of a fast estimator for the bispectrum - the "FFT bispectrum estimator". The implementation of the estimator presented here o…
Upper limits on the 21-cm Epoch of Reionization power spectrum from one night with LOFAR
A. H. Patil, S. Yatawatta, L. V. E. Koopmans +25
We present the first limits on the Epoch of Reionization (EoR) 21-cm HI power spectra, in the redshift range , using the Low-Frequency Array (LOFAR) High-Band Antenna (…
Recovering the HII region size statistics from 21-cm tomography
Koki Kakiichi, Suman Majumdar, Garrelt Mellema +7
We introduce a novel technique, called "granulometry", to characterize and recover the mean size and the size distribution of HII regions from 21-cm tomography. The technique is ea…