Joint MCMC Constraint on αvisc from DESI DR2 Baryon Acoustic Oscillations, SH0ES, and SPARC within the Two-Parameter Bulk Viscous Framework

Key Points

• The aim is to constrain the parameter αvisc within a two-parameter bulk viscous framework using various cosmological datasets.
• Utilized joint MCMC (Markov Chain Monte Carlo) analysis from DESI DR2 and other datasets.
• Integrated data from baryon acoustic oscillations and SH0ES for parameter estimation.
• Defined constraints for αvisc, indicating its significance in current cosmological models.
• Established new insights into the interaction of dark energy and cosmic expansion parameters.