255 citations
- Frankfurt Institute for Advanced StudiesDE10 papers
- Ben-Gurion University of the NegevIL9 papers
- Bulgarian Academy of SciencesBG2 papers
- Haldia Institute of TechnologyIN2 papers
- Institute for Nuclear Research and Nuclear EnergyBG2 papers
- Sister Nivedita UniversityIN2 papers
- University of CalcuttaIN2 papers
- Academy of AthensGR1 paper
- Asia Pacific Center for Theoretical PhysicsKR1 paper
- Astronomy and SpaceAU1 paper
- Atlantic Technological UniversityIE1 paper
- Banaras Hindu UniversityIN1 paper
17 papers
Observational Insights on DBI K-essence Models Using Machine Learning and Bayesian Analysis
Samit Ganguly, Arijit Panda, Eduardo Guendelman +3
We perform a late-time cosmological study; we compare the performance of two Dirac-Born-Infeld (DBI)-type k-essence scalar field extensions of the CDM model to the standard fram…
Non-Affine Extensions of the Raychaudhuri Equation in the K-essence Framework
Samit Ganguly, Goutam Manna, Debashis Gangopadhyay +2
We present a new avenue of the Raychaudhuri Equation (RE) by introducing a non-affine parametrization within the k-essence framework. This modification accounts for non-geodesic fl…
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…
Dark Energy as a Critical Period in Binary Motion: Bounds from Multi-scale Binaries
David Benisty, Jenny Wagner, Denitsa Staicova
The two-body problem under the influence of both dark energy and post-Newtonian modifications is studied. In this unified framework, we demonstrate that dark energy plays the role…
Much ado about no offset -- Characterising the anomalous multiple-image configuration and the model-driven displacement between light and mass in the multi-plane strong lens Abell 3827
Joyce Lin, Jenny Wagner, Richard E. Griffiths
Abell 3827 is a unique galaxy cluster with a dry merger in its core causing a highly-resolved multiple-image configuration of a blue spiral galaxy at . The surfa…
Is the Observable Universe Consistent with the Cosmological Principle?
Pavan Kumar Aluri, Paolo Cea, Pravabati Chingangbam +20
The Cosmological Principle (CP) -- the notion that the Universe is spatially isotropic and homogeneous on large scales -- underlies a century of progress in cosmology. It is conven…