3 papers
astro-ph.CO2025
How Complex is Dark Energy? A Bayesian Analysis of CPL Extensions with Recent DESI BAO Measurements
Mohammad Malekjani, Saeed Pourojaghi, Zahra Davari
The nature of dark energy is one of the big puzzling issues in cosmology. While CDM provides a good fit to the observational data, evolving dark energy scenarios, such as the C…
astro-ph.CO2025
Cosmological constraints on dark energy parametrizations after DESI 2024: Persistent deviation from standard CDM cosmology
M. Malekjani, Z. Davari, S. Pourojaghi
In this work, we present a study on cosmological constraints of dark energy (DE) parametrizations after the observations of Dark Energy Spectroscopic Instruments (DESI) for Baryon…
astro-ph.CO2025
CDM model against cosmography: A possible deviation after DESI 2024
Saeed Pourojaghi, Mohammad Malekjani, Zahra Davari
In this study, we present an analysis of the standard flat-CDM model using a cosmographic approach, incorporating recent DESI BAO observations and Supernovae Type Ia catalogues…