96 citations · 269 across the 11 of their papers we have counts for
11 papers
Investigating the Tension and Expansion-History Mismatch with Diverse Dark Energy Parametrization Frameworks
Upala Mukhopadhyay, Purba Mukherjee, Alexandre Tkatchenko
In this work, we investigate whether the mismatch between early- and late-Universe inferences of the cosmic expansion history is associated with a particular redshift range, and wh…
Inferring dark energy properties from the scale factor parametrisation
Upala Mukhopadhyay, Sandeep Haridasu, Anjan A Sen +1
We propose and implement a novel test to assess deviations from well-established concordance CDM cosmology while inferring dark energy properties. In contrast to the commonly im…
Negative cosmological constant in the dark energy sector: tests from JWST photometric and spectroscopic observations of high-redshift galaxies
Nicola Menci, Shahnawaz A. Adil, Upala Mukhopadhyay +2
Early observations with the James Webb Space Telescope (JWST) have revealed the existence of an unexpectedly large abundance of extremely massive galaxies at redshifts $z \gtrsim 5…
Dark energy in light of the early JWST observations: case for a negative cosmological constant?
Shahnawaz A. Adil, Upala Mukhopadhyay, Anjan A. Sen +1
Early data from the James Webb Space Telescope (JWST) has uncovered the existence of a surprisingly abundant population of very massive galaxies at extremely high redshift, which a…
Constraining PBH mass distributions from 21cm brightness temperature results and an analytical mapping between probability distribution of 21cm signal and PBH masses
Upala Mukhopadhyay, Debasish Majumdar, Ashadul Halder
The evaporation of Primordial Black Hole (PBH) via Hawking radiation influences the evolution of Inter Galactic Medium by heating up the latter and consequently affects the 21cm si…
Discriminating and Constraining the Synchrotron and Inverse Compton Radiations from Primordial Black Hole and Dark Matter at the Galactic Centre Region
Upala Mukhopadhyay, Debasish Majumdar, Avik Paul
The evaporations of Primordial Black Holes (PBH) (via Hawking radiation) can produce electrons/positrons () in the Galactic Centre (GC) region which under the influence of…
Gravitational Wave Signatures from Domain Wall and Strong First-Order Phase Transitions in a Two Complex Scalar extension of the Standard Model
Avik Paul, Upala Mukhopadhyay, Debasish Majumdar
We consider a simple extension of Standard Model by adding two complex singlet scalars with a symmetry. A discrete $\mathcal{Z}_2 \times \mathcal{Z}^{\prime}…
Probing Interacting Dark Energy and Scattering of Baryons with Dark Matter in Light of EDGES 21cm Signal
Upala Mukhopadhyay, Debasish Majumdar, Kanan K. Datta
The EDGES experiment has observed an excess trough ( mK) in the brightness temperature of the 21cm absorption line of neutral Hydrogen atom (HI) from t…
Addressing the High- Problem in Pseudo-Nambu-Goldstone Boson Dark Energy Models with Dark Matter - Dark Energy Interaction
Upala Mukhopadhyay, Avik Paul, Debasish Majumdar
We consider a dark energy scenario driven by a scalar field with a pseudo Nambu Goldstone boson (pNGB) type potential . The pNGB orig…
Swampland Criteria in the Slotheon Field Dark Energy
Upala Mukhopadhyay, Debasish Majumdar
We explore in this work whether Slotheon model of Dark Energy obeys the Swampland criteria of string theory. Since de Sitter vacuum is very difficult to construct in string theory…
Evolution of Dark Energy Perturbations for Slotheon Field and Power Spectrum
Upala Mukhopadhyay, Debasish Majumdar, Debabrata Adak
Within the framework of modified gravity model namely Slotheon model, inspired by the theory of extra dimensions, we explore the behaviour of Dark Energy and the perturbations ther…