3 papers
astro-ph.GA2026
Towards Bayesian Photometric Cosmic Chronometers: Application to VIPERS
Swaraj Pradhan, Pablo Renard, Enrique Gaztanaga +2
The cosmic chronometer (CC) method provides a direct measurement of the expansion history, , from the differential ages of passively evolving galaxies. However, most CC analy…
gr-qc2025
Gravitational Bounce from the Quantum Exclusion Principle
Enrique Gaztanaga, K. Sravan Kumar, Swaraj Pradhan +1
We investigate the fully relativistic spherical collapse model of a uniform distribution of mass with initial comoving radius and spatial curvature $k \equiv 1/Ï_k^2 \l…
gr-qc2025
Cold Collapse and Bounce of an FLRW Cloud
Swaraj Pradhan, Michael Gabler, Enrique Gaztañaga
We study the collapse of spherical cold clouds beyond black hole formation to investigate the possibility of a bounce in the in-falling matter when a critical density or pressure i…