94 citations · 123 across the 9 of their papers we have counts for
9 papers
Gravitational Lensing of the Bullet Cluster in the CCC+TL Cosmology: A Controlled Proof-of-Concept Study
Rajendra P. Gupta, Nikolaos Samaras
A proof-of-concept study of gravitational lensing in the Bullet Cluster under Covarying Coupling Constants plus Tired Light (CCC+TL) cosmology. Using a JWST spectroscopic catalogue…
Supernova Time Dilation in Hybrid Expansion-Tired-Light Cosmologies
Rajendra P. Gupta, Nikolaos Samaras, Utkarsh Kumar
Dark Energy Survey has shown that the emission light curve widths of supernovae increase to , obeying with $b=1.003\p…
Testing Covarying Coupling Constants (CCC) against the full SPARC rotation-curve sample: a like-for-like comparison with MOND and NFW
Rajendra P. Gupta, Nikolaos Samaras
The Covarying Coupling Constants (CCC) framework, developed to account for high-redshift JWST observations, contains a mechanism -- a covarying-constant effective mass field keyed…
Testing the CCC+TL cosmology with cosmic-chronometer measurements of the Hubble parameter
Rajendra P. Gupta
In a recent paper, it was shown that the Covarying Coupling Constants and Tired Light (CCC+TL) hybrid model yields the Hubble parameter that is substantially different from…
Big Bang Nucleosynthesis Constraints on the CCC+TL Cosmology
Rajendra P. Gupta, Nikolaos Samaras
We investigate whether Big Bang nucleosynthesis (BBN) remains compatible with the Covarying Coupling Constants plus Tired Light (CCC+TL) cosmology. In this framework, only quantiti…
Evolution of Size, Mass, and Density of Galaxies Since Cosmic Dawn
Rajendra P. Gupta
The formation and evolution of galaxies and other astrophysical objects have become of great interest, especially since the launch of the James Webb Space Telescope in 2021. The ma…
Testing CCC+TL Cosmology with Galaxy Rotation Curves
Rajendra P. Gupta
This paper aims to explore whether astrophysical observations, primarily galaxy rotation curves, result from covarying coupling constants (CCC) rather than from dark matter. We hav…
Testing CCC+TL Cosmology with Observed BAO Features
Rajendra P. Gupta
The primary purpose of this paper is to see how well a recently proposed new model fits (a) the position of the baryon acoustic oscillations (BAO) features observed in the large-sc…
JWST early Universe observations and ΛCDM cosmology
Rajendra Gupta
Deep space observations of the James Webb Space Telescope (JWST) have revealed that the structure and masses of very early Universe galaxies at high redshifts (z~15), existing at ~…