20 citations · 75 across the 10 of their papers we have counts for
10 papers
Revisiting the equation of state of dark energy from DESI BAO with SNe Ia and CMB
Jie Zheng, Da-Chun Qiang, Zhi-Qiang You +1
The Dark Energy Spectroscopic Instrument (DESI) measurements of baryon acoustic oscillations (BAO) have recently shown a mild preference for dynamical dark energy over the standard…
From Nonparametric Distance Reconstruction to Testing the Etherington Relation and Cosmic Curvature Using 2D and 3D BAO Measurements
Darshan Kumar, Jie Zheng, Zhi-Qiang You +1
We present a joint test of cosmic curvature, , and the cosmic distance-duality relation (CDDR) using the Etherington relation, which connects the luminosity and angular dia…
A cosmographic analysis using DESI-DR2 and strong lensing: I. Time-Delay measurements
Darshan Kumar, Deepak Jain, Shobhit Mahajan
Strong gravitational lensing time-delay measurements, together with the distance sum rule (DSR), offer a model-independent approach to probe the geometry and expansion of the unive…
A cosmographic analysis using DESI-DR2 and strong lensing: II. Distance Ratio measurements
Darshan Kumar, Deepak Jain, Shobhit Mahajan
The distance ratios derived from strong lensing systems, combined with complementary cosmological observations, allow for the study of cosmic expansion and curvature without assumi…
The impact of 2D and 3D BAO measurements on the Cosmic Distance Duality Relation with HII galaxies
Jie Zheng, Da-Chun Qiang, Zhi-Qiang You +1
The cosmic distance duality relation (CDDR) is a fundamental and practical condition in observational cosmology that connects the luminosity distance and angular diameter distance.…
Study of Various Dark Matter Halo Profiles in Milky Way and M31 Galaxies within the Standard Cosmology Framework
Darshan Kumar, Nisha Rani, Deepak Jain +2
In this paper, we study the rotation curves of the Milky Way galaxy (MW) and Andromeda galaxy (M31) by considering their bulge, disk, and halo components. We model the bulge region…
Gamma Rays Bursts: A Viable Cosmological Probe?
Darshan Kumar, Nisha Rani, Deepak Jain +2
In this work, our focus is on exploring the potential of current GRB measurements to provide reliable constraints on cosmological model parameters at high redshift. This work is di…
Constraints on the Transition Redshift using Hubble Phase Space Portrait
Darshan Kumar, Deepak Jain, Shobhit Mahajan +2
One of the most significant discoveries in modern cosmology is that the universe is currently in a phase of accelerated expansion after a switch from a decelerated expansion. The r…
A non-parametric test of variability of Type Ia supernovae luminosity and CDDR
Darshan Kumar, Akshay Rana, Deepak Jain +3
The first observational evidence for cosmic acceleration appeared from Type Ia supernovae (SNe Type Ia) Hubble diagram from two different groups. However, the empirical treatment o…
Constraining Cosmological and Galaxy Parameters using Strong Gravitational Lensing Systems
Darshan Kumar, Deepak Jain, Shobhit Mahajan +2
Strong gravitational lensing along with the distance sum rule method can constrain both cosmological parameters as well as density profiles of galaxies without assuming any fiducia…