23 citations · 54 across the 10 of their papers we have counts for
10 papers
High-Redshift Signatures from the Cosmic Dawn and the Epoch of Reionization
Rennan Barkana, Oliver Basquette, Ankita Bera +22
In this chapter, we provide a comprehensive overview of the astrophysical and cosmological processes that shape the 21-cm signal during Cosmic Dawn and the Epoch of Reionization. W…
A universal model for the accretion rates and formation times of dark matter halos
Ankita Bera, Benedikt Diemer
The formation histories of halos set the baseline rate at which galaxies accrete gas over cosmic time. While a number of models describe these histories and their derivative, the m…
Towards Reconciling Reionization with JWST: The Role of Bright Galaxies and Strong Feedback
Ankita Bera, Sultan Hassan, Robert Feldmann +2
The elevated UV luminosity functions (UVLF) from recent James Webb Space Telescope (JWST) have challenged the viability of existing theoretical models. To address this, we use a se…
Unveiling the cosmic dawn and epoch of reionization using cosmic 21-cm signal
Ankita Bera
The cosmological 21-cm signal from neutral hydrogen, which is considered as a promising tool, is being used to observe and study the cosmic dawn (CD) and epoch of reionization (EoR…
JWST constraints on the UV luminosity density at cosmic dawn: implications for 21-cm cosmology
Sultan Hassan, Christopher C. Lovell, Piero Madau +10
An unprecedented array of new observational capabilities are starting to yield key constraints on models of the epoch of first light in the Universe. In this Letter we discuss the…
Studying Cosmic Dawn using redshifted HI 21-cm signal: A brief review
Ankita Bera, Raghunath Ghara, Atrideb Chatterjee +2
In this review article, we briefly outline our current understanding of the physics associated with the HI 21-cm signal from cosmic dawn. We discuss different phases of cosmic dawn…
Bridging the Gap between Cosmic Dawn and Reionization favors Faint Galaxies-dominated Models
Ankita Bera, Sultan Hassan, Aaron Smith +4
It has been claimed that traditional models struggle to explain the tentative detection of the 21\,cm absorption trough centered at measured by the EDGES collaboration. O…
Impact of cosmic rays on the global 21-cm signal during cosmic dawn
Ankita Bera, Saumyadip Samui, Kanan K. Datta
It is extremely important to understand the processes through which the thermal state of the inter-galactic medium (IGM) evolved in the early universe in order to study the evoluti…
Primordial magnetic fields during the cosmic dawn in light of EDGES 21-cm signal
Ankita Bera, Kanan K. Datta, Saumyadip Samui
We study prospects of constraining the primordial magnetic field (PMF) and its evolution during the dark ages and cosmic dawn in light of EDGES 21-cm signal. Our analysis has been…
Cosmic recombination history in light of EDGES measurements of the cosmic dawn 21-cm signal
Kanan K. Datta, Aritra Kundu, Ankit Paul +1
The recent EDGES measurements of the global 21-cm signal from the cosmic dawn suggest that the kinetic temperature of the inter-galactic medium (IGM) might be significantly lower c…