3 papers
astro-ph.CO2026
Spherical Collapse and Halo Formation in a Cosmology with Decaying Dark Matter and a Semi-Cosmographic Dark Energy
Mohit Yadav, Tapomoy Guha Sarkar
We investigate nonlinear structure formation in a cosmological model combining one-body decaying dark matter (DDM) with a semi-cosmographic reconstruction of dark energy. In this s…
astro-ph.CO2026
Semi-cosmographic constraints on decaying dark matter and dynamical dark energy: DESI DR2 BAO and 21\, cm intensity-mapping forecasts
Mohit Yadav, Pankaj Chavan, Tapomoy Guha Sarkar
Cosmographic reconstructions provide a model-agnostic approach towards constraining cosmic evolution. In this work, we develop a semi-cosmographic framework that adopts a Padé-rat…
astro-ph.CO2025
Probing Decaying Dark Matter Using the Post-EoR HI 21-cm signal
Mohit Yadav, Tapomoy Guha Sarkar
We propose the HI 21-cm power spectrum from the post-reionization epoch as a probe of a cosmological model with decaying dark matter particles. The unstable particles are assumed t…