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The Tracking Tapered Gridded Estimator (TTGE) for the power spectrum from drift scan observations
Suman Chatterjee, Somnath Bharadwaj, Samir Choudhuri +2
Intensity mapping with the redshifted 21-cm line is an emerging tool in cosmology. Drift scan observations, where the antennas are fixed to the ground and the telescope's pointing…
Modelling the energy distribution in CHIME/FRB Catalog-1
Siddhartha Bhattacharyya, Somnath Bharadwaj, Himanshu Tiwari +1
We characterize the intrinsic properties of any FRB using its redshift , spectral index and energy in units of emitted across $2128 - 2848\; {\…
Quantifying the redshift space distortion of the bispectrum III : Detection prospects of the multipole moments
Arindam Mazumdar, Debanjan Sarkar, Somnath Bharadwaj
The redshift space anisotropy of the bispectrum is generally quantified using multipole moments. The possibility of measuring these multipoles in any survey depends on the level of…
Towards 21-cm Intensity Mapping at with uGMRT using the Tapered Gridded Estimator I: Foreground Avoidance
Srijita Pal, Kh. Md. Asif Elahi, Somnath Bharadwaj +8
The post-reionization neutral hydrogen (HI) 21-cm intensity mapping signal holds the potential to probe the large scale structures, study the expansion history and cons…
Redshifted 21-cm bispectrum: Impact of the source models on the signal and the IGM physics from the Cosmic Dawn
Mohd Kamran, Raghunath Ghara, Suman Majumdar +5
The radiations from the first luminous sources drive the fluctuations in the 21-cm signal at Cosmic Dawn (CD) via two dominant astrophysical processes i.e. the Ly coupling and X…