109 citations · 252 across the 9 of their papers we have counts for
6 papers · 1 filter
Strong Lensing by Galaxy Clusters
Priyamvada Natarajan, Liliya L. Williams, Marusa Bradac +4
Galaxy clusters as gravitational lenses play a unique role in astrophysics and cosmology: they permit mapping the dark matter distribution on a range of scales; they reveal the pro…
What Multiple Images Say About the Large-Scale Mass Maps of Galaxy Clusters
Kekoa Lasko, Liliya L. R. Williams, Agniva Ghosh
All lens modeling methods, simply-parametrized, hybrid, and free-form, use assumptions to reconstruct galaxy clusters with multiply imaged sources, though the nature of these assum…
An excursion into the core of the cluster lens Abell 1689
Agniva Ghosh, Dominic Adams, Liliya L. R. Williams +3
Abell 1689 is a well studied cluster of galaxies and one of the largest gravitational lens systems ever observed. We have obtained a reconstruction of the cluster Abell 1689 using…
Further support for a trio of mass-to-light deviations in Abell 370: free-form Grale lens inversion using BUFFALO strong lensing data
Agniva Ghosh, Liliya L. R. Williams, Jori Liesenborgs +9
We use the Beyond Ultra-deep Frontier Fields and Legacy Observations (BUFFALO) strong lensing image catalog of the merging galaxy cluster Abell 370 to obtain a mass model using the…
Exotic Image Formation in Strong Gravitational Lensing by Clusters of Galaxies -- II: Uncertainties
Ashish Kumar Meena, Agniva Ghosh, J. S. Bagla +1
Due to the finite amount of observational data, the best-fit parameters corresponding to the reconstructed cluster mass have uncertainties. In turn, these uncertainties affect the…
Constraining the intergalactic medium at 9.1 using LOFAR Epoch of Reionization observations
R. Ghara, S. K. Giri, G. Mellema +19
We derive constraints on the thermal and ionization states of the intergalactic medium (IGM) at redshift 9.1 using new upper limits on the 21-cm power spectrum measured b…