3 papers
astro-ph.CO2026
Probing cosmic anisotropy with galaxy clusters and supernovae
Shubham Barua, Sujit K. Dalui, Shantanu Desai
Using CDM and Padé-(2,1) cosmography, we study directional variations in the Hubble constant, , using galaxy cluster and Type Ia Supernovae (from Pantheon Plus) by the he…
astro-ph.CO2026
A test of invariance of halo surface density for FIRE-2 simulations with cold dark matter and self-interacting dark matter
Sujit K. Dalui, Shantanu Desai
Numerous observations have shown that the dark matter halo surface density, defined as the product of core radius and halo central density of cored dark matter haloes is nearly con…
astro-ph.CO2025
Testing the cosmic distance duality relation using model-independent approach
Shubham Barua, Sujit K. Dalui, Rikiya Okazaki +1
In this work, we test the cosmic distance duality relation (CDDR) using the arbitrary redshift pivot Padé-(2,1) expansion methodology developed in arXiv:2509.16196. This approach…