Suman Chatterjee
Visiting Fellow
Email: schatterjee [at] ncra.tifr.res.in
Phone: 020-2571 9252
Extn: 9252
Office: 218C
National Centre for Radio Astrophysics
Tata Institute of Fundamental Research
Savitribai Phule Pune University Campus,
Pune 411 007
Maharashtra, INDIA
Tata Institute of Fundamental Research
Savitribai Phule Pune University Campus,
Pune 411 007
Maharashtra, INDIA
Main Research Areas: Cosmology; Large scale structure; 21-cm cosmology.
Biography:
Suman Chatterjee obtained a B.Sc. in Physics in 2010 from the University of Calcutta, an M.Sc. in Physics in 2012 from the Indian Institute of Technology-Madras, Chennai, and a Ph.D. in 2020 from the Indian Institute of Technology-Kharagpur. He joined NCRA-TIFR in March 2020 as a Visiting Post-doctoral Fellow.Research description:
The study of phenomena at the largest cosmological scales in the late time universe has recently seen a renewed interest. This has been mostly driven by the forthcoming generation of experiments which will scrutinise the cosmic large-scale structure with unprecedented accuracy over the biggest volume ever surveyed. Hydrogen is ubiquitous in the Universe, amounting to ~75% of the gas mass present in the intergalactic medium (IGM). The 21-cm line is produced by the spin-flip transition of an electron between two hyperfine levels of the neutral Hydrogen (HI). Intensity mapping (IM) with the HI 21-cm radiation is a promising tool to study the large scale structures Universe. Several ongoing and upcoming experiments aim to detect the HI 21-cm radiation from the dark ages to the post-reionization era. The Ooty Wide Field Array (OWFA) is an upgrade of the Ooty Radio telescope (ORT) that aims to detect and measure HI 21-cm signal from redshift z = 3.35. Over the last few years, I have been working on different aspects of detecting the HI 21-cm signal using OWFA.Selected publications:
1. The Tracking Tapered Gridded Estimator (TTGE) for the power spectrum from drift scan observations (S.Chatterjee, S. Bharadwaj, S. Choudhuri, S. Sethi, A. K. Patwa, 2022, MNRAS, in press, arxiv:2212.01251) 2. Simulated Predictions for HI at z=3.35 with the Ooty Wide Field Array(OWFA) - II : Foreground Avoidance (S. Chatterjee, S. Bharadwaj and V. R. Marthi 2021, MNRAS, 500,4398) 3. On the Prospects of Measuring the Cosmic Dawn 21-cm Power Spectrum using the Upgraded Giant Metrewave Radio Telescope (uGMRT) (S. Chatterjee and S. Bharadwaj 2019, MNRAS, 483, 2269) 4. A Spherical Harmonic Analysis of the Ooty Wide Field Array (OWFA) Visibility Signal (S. Chatterjee and S. Bharadwaj 2018, MNRAS, 478, 2915) 5. Simulated foreground predictions for HI at z = 3.35 with the Ooty Wide Field Array: I. Instrument and the foregrounds (V. R. Marthi, S. Chatterjee, J. N. Chengalur and S. Bharadwaj 2017, MNRAS, 471, 3112)
BACK