Yun Chen

collaborators

3 papers

astro-ph.CO2026

Dynamical Dark Energy and the Unresolved Hubble Tension: Multi-model Constraints from DESI 2025 and Other Probes

Zhuoming Zhang, Tengpeng Xu, Yun Chen

We present a Bayesian comparative analysis of five cosmological models: $I^$ CDM, $w$ CDM, $w_{0} w_{a}$ CDM, $I ¨ $ CDM (with scalar-field dark energy), and an interacting dark energy scenar…

astro-ph.CO2026

Probing dynamical dark energy with late-time data: Evidence, tensions, and the limits of the $w_{0} w_{a}$ CDM framework

Tengpeng Xu, Suresh Kumar, Yun Chen +4

We test the dynamical dark-energy $w_{0} w_{a}$ CDM (CPL) framework against $Λ$ CDM using CMB anisotropies and lensing together with DESI DR2, SDSS-IV, transverse/angular BAO (BAOtr), and…

astro-ph.CO2025

Genetic algorithm demystified for cosmological parameter estimation

Reginald Christian Bernardo, Yun Chen

Genetic algorithm (GA) belongs to a class of nature-inspired evolutionary algorithms that leverage concepts from natural selection to perform optimization tasks. In cosmology, the…

Dynamical Dark Energy and the Unresolved Hubble Tension: Multi-model Constraints from DESI 2025 and Other Probes

Probing dynamical dark energy with late-time data: Evidence, tensions, and the limits of the w0​wa​CDM framework

Genetic algorithm demystified for cosmological parameter estimation

Probing dynamical dark energy with late-time data: Evidence, tensions, and the limits of the $w_{0} w_{a}$ CDM framework