Suresh Kumar

activity

20202026

most citedCosmology Intertwined II: The Hubble Constant Tension

540 citations · 1.8k across the 17 of their papers we have counts for

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astro-ph.CO2026

Probing late-time deviations from $Λ$ CDM with a quadratic dark energy expansion

Sehjal Khandelwal, Abraão J. S. Capistrano, Suresh Kumar +1

We investigate the observational viability of a quadratic dark energy expansion (QDEE) model as a phenomenological extension of the standard $Λ CDM$ cosmological framework.…

astro-ph.CO2026

Statistical consistency of sign-switching vacuum energy with cosmological observations

Sehjal Khandelwal, Abraão J. S. Capistrano, Suresh Kumar

We assess dataset agreement and late-time predictive adequacy in $Λ$ CDM and its sign-switching extension, $Λ_{s}$ CDM, using a suite of Gaussian and exact non-Gaussian consisten…

astro-ph.CO2026

Probing dynamical dark energy with late-time data: Evidence, tensions, and the limits of the $w_{0} w_{a}$ CDM framework

Tengpeng Xu, Suresh Kumar, Yun Chen +2

We test the dynamical dark-energy $w_{0} w_{a}$ CDM (CPL) framework against $Λ$ CDM using CMB anisotropies and lensing together with DESI DR2, SDSS-IV, transverse/angular BAO (BAOtr), and…

Probing late-time deviations from ΛCDM with a quadratic dark energy expansion

Statistical consistency of sign-switching vacuum energy with cosmological observations

Probing dynamical dark energy with late-time data: Evidence, tensions, and the limits of the w0​wa​CDM framework

Probing late-time deviations from $Λ$ CDM with a quadratic dark energy expansion

Probing dynamical dark energy with late-time data: Evidence, tensions, and the limits of the $w_{0} w_{a}$ CDM framework