311 citations · 874 across the 10 of their papers we have counts for
16 papers
Large HI optical depth and Redshifted 21-cm signal from cosmic dawn
Kanan K. Datta, Raghunath Ghara, Ariful Hoque +1
The HI 21-cm optical depth () can be considerably large as the kinetic and spin temperature of the inter-galactic medium (IGM) is expected to be very low during cosmic dawn. I…
Constraining the state of the intergalactic medium during the Epoch of Reionization using MWA 21-cm signal observations
Raghunath Ghara, Sambit K. Giri, Benedetta Ciardi +2
The Murchison Widefield Array (MWA) team has derived new upper limits on the spherically averaged power spectrum of the 21-cm signal at six redshifts in the range $z \approx 6.5-8.…
Redshifted 21-cm bispectrum II: Impact of the spin temperature fluctuations and redshift space distortions on the signal from the Cosmic Dawn
Mohd Kamran, Raghunath Ghara, Suman Majumdar +5
We present a study of the 21-cm signal bispectrum (which quantifies the non-Gaussianity in the signal) from the Cosmic Dawn (CD). For our analysis, we have simulated the 21-cm sign…
Prospects of constraining reionization model parameters using Minkowski tensors and Betti numbers
Akanksha Kapahtia, Pravabati Chingangbam, Raghunath Ghara +2
We explore the possibility of constraining model parameters of the Epoch of Reionization (EoR) from 21cm brightness temperature maps, using a combination of morphological descripto…
Redshift-space distortions in simulations of the 21-cm signal from the cosmic dawn
Hannah E. Ross, Sambit K. Giri, Keri L. Dixon +3
The 21-cm signal from the Cosmic Dawn (CD) is likely to contain large fluctuations, with the most extreme astrophysical models on the verge of being ruled out by observations from…
Comparing Foreground Removal Techniques for Recovery of the LOFAR-EoR 21cm Power Spectrum
Ian Hothi, Emma Chapman, Jonathan R. Pritchard +10
We compare various foreground removal techniques that are being utilised to remove bright foregrounds in various experiments aiming to detect the redshifted 21cm signal of neutral…