170 citations · 1k across the 18 of their papers we have counts for
9 papers · 1 filter
A direct detection of neutral hydrogen intensity mapping on Mpc scales at and
Sourabh Paul, Zhaoting Chen, Mario G. Santos +1
We report the detection of the cosmological power spectrum using the intensity mapping signal from 21-cm emission of neutral hydrogen (HI), derived from interferometric observation…
A framework to mitigate patchy reionization contamination on the primordial gravitational wave signal
Divesh Jain, Tirthankar Roy Choudhury, Suvodip Mukherjee +1
One of the major goals of future cosmic microwave background (CMB) -mode polarization experiments is the detection of primordial gravitational waves through an unbiased measurem…
HI intensity mapping with the MIGHTEE survey: power spectrum estimates
Sourabh Paul, Mario G. Santos, Junaid Townsend +5
Intensity mapping (IM) with neutral hydrogen is a promising avenue to probe the large scale structure of the Universe. In this paper, we demonstrate that using the 64-dish MeerKAT…
CMB constraints on a physical model of reionization
Tirthankar Roy Choudhury, Suvodip Mukherjee, Sourabh Paul
We study constraints on allowed reionization histories by comparing predictions of a physical semi-numerical model with secondary temperature and polarization anisotropies of the c…
Inevitable imprints of patchy reionization on the cosmic microwave background anisotropy
Sourabh Paul, Suvodip Mukherjee, Tirthankar Roy Choudhury
Reionization of the cosmic neutral hydrogen by the first stars in the Universe is an inhomogeneous process which produces spatial fluctuations in free electron density. These fluct…
Is patchy reionization an obstacle in detecting the primordial gravitational wave signal?
Suvodip Mukherjee, Sourabh Paul, Tirthankar Roy Choudhury
The large-scale CMB B-mode polarization is the direct probe to the low frequency primordial gravitational wave signal. However, unambiguous measurement of this signal requires a pr…
Delay Spectrum with Phase-Tracking Arrays: Extracting the HI power spectrum from the Epoch of Reionization
Sourabh Paul, Shiv K. Sethi, Miguel F. Morales +51
The Detection of redshifted 21 cm emission from the epoch of reionization (EoR) is a challenging task owing to strong foregrounds that dominate the signal. In this paper, we propos…
Confirmation of Wide-Field Signatures in Redshifted 21 cm Power Spectra
Nithyanandan Thyagarajan, Daniel C. Jacobs, Judd D. Bowman +52
We confirm our recent prediction of the "pitchfork" foreground signature in power spectra of high-redshift 21 cm measurements where the interferometer is sensitive to large-scale s…
Empirical Covariance Modeling for 21 cm Power Spectrum Estimation: A Method Demonstration and New Limits from Early Murchison Widefield Array 128-Tile Data
Joshua S. Dillon, Abraham R. Neben, Jacqueline N. Hewitt +52
The separation of the faint cosmological background signal from bright astrophysical foregrounds remains one of the most daunting challenges of mapping the high-redshift intergalac…